Easy Tool - Real time connection table analysis v4.0

[HeikoAnkenbrand]

Overview

From version R80.10 to version R81.10.

For many Check Point users the question arises again and again, which connections and services are used by a rule, a port, an destination IP or source IP  in real time. For this purpose I have created a small tool, which all information about a rule can be read out in real time from the connection table.

This is good for optimizing the ruleset, as it provides a real-time view of the connection table with the corresponding info. This can be a good solution in more complex environments to see what this rule really do.

The following questions can be answered:

• In which rules is port 443 currently used?
• In which rules is the source or destination IP is used?
• Which connections, ports, protocols and are active for rule xy?
• How many connections are there for rule xy in the TCP SYN, ACK or FIN state?
• How can I simplify rules and combine them, for example, into class C or B networks?
• What IP communication is there e.g. for port 80 or for the rule xy?

This tool will help you quickly answer these questions and many more.

Tool

When you execute this oneliner, a new cli command "econn" will be created.
After that, you only need to execute the following cli command in expert mode with the parameters.

The output of the tool always show:

• Shows all rules to which the filter applies
• Shows all UDP and TCP ports to which the filter applies.
• Shows a summary of all TCP (SYN, Syn-ACK, ACK,FIN) , UDP, ICMP, VRRP, IGMP values for the filtered connections.
• Indicates which protocols are currently in use (TCP, UDP,...)
• Summary of all used Check Point services (https, echo-request, CPD_amon, FW1_log,...)
• Incoming and outgoing interface (eth0, bond1.10, ...)
• Check Point service names 
• Formatted output of the connection table:
  (rule,  protoll  ,source IP, source port, destination IP, destination port, session timeout, TCP state, interface in and out, Check Point service)

Since version 3.0 VSX is supported:
On VSX systems, change to the corresponding virtual system with "vsenv" and execute "econn" on that VS system.

Filter Syntax	Description
-a	Show the information about the complete connection table.
-r <rule number>	Show the information about a specific rule with the corresponding rule number. Inline rules for example 2.1 are not possible. You can only use the base rule in this case 2.
-p <port>	Show the information about a specific destination port with the corresponding port number.
-d <destination IP>	Show the information about a specific destination IP with the corresponding IP.
-s <source IP>	Show the information about a specific source IP with the corresponding IP.
-g <grep parameter>	Search filter for the corresponding grep parameters in the raw data of "fw ctl conntab".
-e <grep parameter>	Search filter for the corresponding grep parameters in the connection table output view.

Delete Connections	Description
-x	Attention!!! This parameter deletes all connections from the connection table that match the filters. Grep parameters (-g) cannot be deleted in the combination with this option. This parameter is only available from R81 and higher.

Output extension	Description
-c	Shows the corresponding connection table entries.
-t	Tip! Display possible class C and B networks where the corresponding IP addresses from the connection table would match. This function is good to simplify rules.
-i	Displays only the summarized IP communication. Also used to simplify the set of rules.
-n	No summary output.

File	Description
-w <file name>	Write connection table to file.
-f <file name>	Read connection table from file. Important! Search filters (-r, -p, -d, -s ) only work when writing the file -w not with the option -f.

Examples

Examples	Description
# econn -r 10 -c	Shows all basic informations (used Ports, counter TCP/UDP/ICMP...) to rule 10 and displays the appropriate connection table entries.
# econn -a	Gives an overview of all connectiontabel entries (used ports, used protocols and counter TCP/UDP/ICMP...).
# econn -p 443 -c	Displays all rules where port 443 is used and prints all connection table entries.
# econn -d 1.1.1.1 -c	Displays all rules where destination IP 1.1.1.1 is used and gives an overview of all connection table entries (used ports, used protocols and counter TCP/UDP/ICMP...) and prints all connection table entries.
# econn -s 1.1.1.1 -c	Displays all rules where source IP 1.1.1.1 is used and gives an overview of all connection table entries (used ports, used protocols and counter TCP/UDP/ICMP...) and prints all connection table entries.
# econn -s 1.1.1.0-1.1.1.255	Displays all rules where source IP range from 1.1.1.1 to 1.1.1.255
# econn -r 10 -t -i	Shows all basic informations to rule 10 and summarizes all IP addresses to possible class C and B networks and output the IP communication summed by source IP's.
# econn -p 80 -t -i -c	Shows all possible informations to port 80 in the connection table: rules, connection summaries, used protocols and ports, grouped networks, IP communication
# econn -p 443 -g SYN -c	Shows all possible informations to port 443 in the connection table with "TCP SYN" state
# econn -r 10 -p 53 -x	Attention!!! Delete all possible connections with port 53 in rule 10 in the connection table.
# econn -w test -p 433	Write the connection table to tar file where port 443 is used.
# econn -f test -c -e SYN	Read the connection table from tar file and show the output with the filter view option for SYN.
# econn -n -p 443 -e SYN_SENT	Don't show the connection summary + show connection table for port 443 and TCP state SYN.

Install Tool

Use this auto installer script from "Spoiler" on the Firewall Gateway as CLI command in expert mode:

Click to Expand

curl_cli -k http://www.ankenbrand24.de/inst_econn > /tmp/inst_econn && chmod 770 /tmp/inst_econn && /tmp/inst_econn

Or "copy and past" the following script block from "Spoiler" to your Firewall Gateway (in expert mode):

Click to Expand

cat <<EOT > /usr/bin/econn
#!/bin/bash
VERSION="4.0";
SHOW_CONN="0";
SHOW_GROUPED="0";
SHOW_IP="0";
DEL_CONN="0";
SUCHEN="";
FILTER_GREP="-v 'fgsdg'";
ENTRIE_GREP="-v 'hgdfk'";
FILE_Y="0";
FILE_FY="0";
SHOW_SUM="1";
echo "" > /tmp/econn_ip.txt
clear;
echo -e "\e[7m";printf '%.s ' {1..132}; echo;
echo  " Real time connection table analysis                                                                by Heiko Ankenbrand 2021 (v\$VERSION) ";
printf '%.s ' {1..132};echo -e "\e[0m";
IsGATEWAY=`cpprod_util FwIsFirewallModule`;
if [ \$IsGATEWAY != "1" ] ;
  then 
    echo ;
    echo "This is not a gateway!";
    echo ;
    exit 1;
fi
while [[ \$# -gt 0 ]]
do
key1="\$1"
case \$key1 in
    -h|--help.)
       shift;
       echo;
       echo -e "\e[6m";echo -n " Help overview";printf '%.s ' {1..118};echo -e "\e[0m";
       echo 
       echo "Filter Syntax"
       echo "   -a                           Show the information about the complete connection table.";
       echo "   -r <rule number>             Show the information about a specific rule with the corresponding rule number.";
       echo "   -p <port>                    Show the information about a specific destination port with the corresponding port number.";
       echo "   -d <destination IP>          Show the information about a specific destination IP with the corresponding IP.";
       echo "   -d <dIP_start-dIP_end>       Show the information about a specific destination IP range with the corresponding IP.";
       echo "   -s <source IP>               Show the information about a specific source IP with the corresponding IP.";
       echo "   -g <grep parameter>          Filters the search for the corresponding grep parameters.";
       echo ;
       echo "Output extension";
       echo "   -c                           Shows the corresponding connection table entries.";
       echo "   -e                           Is an option that sets a grep filter only on the output of the connection table view.";
       echo "   -t                           Display possible class C and B networks where the corresponding IP addresses from ";
       echo "                                the connection table would match. This function is good to simplify rules.";
       echo "   -i                           Displays only the summarized IP communication. Also used to simplify the set of rules.";
       echo "   -n                           No summary output";
       echo ;
       echo "Delete connection";
       echo "   -x                           Attention!!! This parameter deletes all connections from the connection table that match the "
       echo "                                             filters. Grep parameters (-g) cannot be deleted in the combination with this option.";
       echo "File";
       echo "   -w <file name>               Write connection table to file.";
       echo "   -f <file name>               Read connection table from file."; 
       echo "                                Important!";
       echo "                                Search filters only work when writing the file -w not with the option -f.";
       echo -e "\e[6m";echo -n " Examples";printf '%.s ' {1..123};echo -e "\e[0m";
       echo "# econn -r 10 -c                Shows all basic informations (used Ports, counter TCP/UDP/ICMP...) to rule 10 and displays";
       echo "                                the appropriate connection table entries.";
       echo "# econn -a                      Gives an overview of all connectiontabel entries (used ports, used protocols and counter";
       echo "                                TCP/UDP/ICMP...)";
       echo "# econn -p 443 -c               Displays all rules where port 443 is used and prints all connection table entries.";
       echo "# econn -d 1.1.1.1 -c           Displays all rules where destination IP 1.1.1.1 is used and gives an overview of all ";
       echo "                                connection table entries (used ports, used protocols and counter TCP/UDP/ICMP...) and";
       echo "                                prints all connection table entries.";
       echo "# econn -s 1.1.1.1 -c           Displays all rules where source IP 1.1.1.1 is used and gives an overview of all connection";
       echo "                                table entries (used ports, used protocols and counter TCP/UDP/ICMP...) and prints all";
       echo "                                connection table entries.";   
       echo "# econn -s 1.1.1.0-1.1.1.255    Displays all rules where source IP range from 1.1.1.1 to 1.1.1.255.";
       echo "# econn -r 10 -t -i             Shows all basic informations to rule 10 and summarizes all IP addresses to possible";
       echo "                                class C and B networks and output the IP communication summed by source IP's.";
       echo "# econn -p 80 -t -i -c          Shows all possible informations to port 80 in the connection table: rules, connection ";
       echo "                                summaries, used protocols and ports, grouped networks, IP communication.";
       echo "# econn -p 443 -g SYN -c        Shows all possible informations to port 443 in the connection table with 'TCP SYN' state";
       echo "# econn -r 10 -p 53 -x          Attention!!! Delete all possible connections with port 53 in rule 10 in the connection table.";
       echo "# econn -w test -p 433          Write the connection table to tar file where port 443 is used.";
       echo "# econn -f test                 Read the connection table from tar file and show the output.";
       echo "# econn -f test -c -e SYN       Read the connection table from tar file and show the output with the filter view option for SYN.";
       echo "# econn -n -p 443 -e SYN_SENT   Don't show the connection summary + show connection table for port 443 and TCP state SYN.";
       echo;
       exit 1;
    ;;
    -x|-del)
       shift;
       SHOW_CONN="1";
       DEL_CONN="1";
    ;;
    -n)
       shift;
       SHOW_SUM="0";
       SHOW_CONN="1";
    ;;
    -s|--sip)
       key="\$2";
       FILTER="\$FILTER -sip=\$key";
       SUCHEN="\$SUCHEN Source IP=\$key ";
       shift;
       shift;
    ;; 
    -d|--dip)
       key="\$2";
       FILTER="\$FILTER -dip=\$key"; 
       SUCHEN="\${SUCHEN}Destination IP=\$key ";
       shift;
       shift;
    ;;
    -p|--port)
       key="\$2";
       FILTER="\$FILTER -dport=\$key";
       SUCHEN="\${SUCHEN}DPort=\$key ";
       shift;
       shift;
    ;;
    -a|--all)
       key="\$2";
       FILTER="";
       SUCHEN="Complete connection table!";
       shift;
    ;;
    -r|--role)
       key="\$2";
       FILTER="\$FILTER -rule=\$key"; 
       SUCHEN="\${SUCHEN}Rule=\$key ";
       shift;
       shift;
    ;;
    -g|--grep)
       key="\$2";
       FILTER_GREP="\$key"; 
       SUCHEN="\${SUCHEN}GREP='\$key' ";
       shift;
       shift;
    ;;
    -e)
       ENTRIE_GREP="\$2";
       SHOW_CONN="1";
       if [ "x\$ENTRIE_GREP" = "x" ]
         then
           echo "Parameter -e not correct set!";
           ENTRIE_GREP="-v dsfgdsj";
       fi
       shift;
       shift;
    ;;
    -t|-tip)
       shift;
       SHOW_GROUPED="1";
    ;;
    -i|-ip)
       shift;
       SHOW_IP="1";
    ;;
    -c|-conn)
       SHOW_CONN="1";
       shift;
    ;;
    -w)
       FILE_W="\$2";
       FILE_W="\${FILE_W}.tgz";
       FILE_Y="1";
       shift;
       shift;
    ;;
    -f)
       FILE_F="\$2";
       FILE_F="\${FILE_F}.tgz";
       FILE_FY="1";
       shift;
       shift;
    ;;

    *)
    POSITIONAL+=("\$1") # save it in an array for later
    shift # past argument
    ;;
esac
done
if [ \$FILE_FY == "1" ] ;
  then
     if test -f "\$FILE_F"; 
        then
           echo -e "\e[6m";echo -n " Read connection table from tar archive";printf '%.s ' {1..93};echo -e "\e[0m";
           echo "Read  file     : \$FILE_F";
           tar xzfP \$FILE_F;
           FILTER="";
           SUCHEN="";
           if [ ! -f /tmp/econn_ports ]; then
               echo;
               echo "File /tmp/econn_ports not found in tar!";
               echo;
               exit 1;
           fi
           if [ ! -f /tmp/econn_ip.txt ]; then
               echo;
               echo "File /tmp/econn_ip.txt not found in tar!";
               echo;
               exit 1;
           fi
           if [ ! -f /tmp/econn_if ]; then
               echo;
               echo "File /tmp/econn_if not found in tar!";
               echo;
               exit 1;
           fi
           echo -n "CT entries     : ";
           more /tmp/econn_ip.txt | wc -l;

        else 
           echo;
           echo "File \$FILE_F not exist";
           echo;
           exit 1;
     fi
  else

     fw ctl conntab \$FILTER 2>&1 |grep \$FILTER_GREP | grep -v "Got NULL" |grep -v "gen_services_array Failed" | egrep -v '^\s*$|^#' > /tmp/econn_ip.txt;
     fw ctl iflist > /tmp/econn_if;
     if test -f "\$FWDIR/state/__tmp/FW1/local.set"; then
         more \$FWDIR/state/__tmp/FW1/local.set | grep srv_name | awk '{split(\$0,a,","); print a[1] " " a[3];}' | sed -e 's/: (\"//g' > /tmp/econn_ports;
     fi
fi

if [ \$FILE_Y == "1" ] ;
  then
   echo -e "\e[6m";echo -n " Write connection table to tar archive";printf '%.s ' {1..94};echo -e "\e[0m";
   echo -n "Search filter            : \$SUCHEN";
   tar -czf \$FILE_W -P /tmp/econn_ip.txt /tmp/econn_if /tmp/econn_ports;
   echo;
   echo -n "Connection table entries : ";
   more /tmp/econn_ip.txt | wc -l;
   echo "Written in file          : \$FILE_W";
   echo ;
   exit 1;
fi
if [ \$SHOW_SUM == "1" ] ;
  then 
echo -e "\e[6m";echo -n " Connection Summary";printf '%.s ' {1..113};echo -e "\e[0m";
echo -n "Search         : \$SUCHEN";
vsx_system=\`fw vsx stat 2>&1 | grep -c "VSX is not supported"\`
echo ;
if [ \$vsx_system == "0" ] 
     then
        echo -n "VSX VS         : ";
        vsx_vsenv1=\`vsx get | awk '{split(\$0,a,"("); sub(/ID /, "", a[2]); sub(/)./, "", a[2]);  print a[2]; }'\`
        echo "\$vsx_vsenv1"
fi 
echo -n "Rules          : ";
more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#' | awk '{printf "%s, \n", \$1}' 2>&1 | grep -v -E '^[1-9][0-9][0-9][0-9][0-9][0-9]' |grep -v '0,' | sort -n | uniq | tr -d '\n' | sed -e 's/0000002f/GRE/g' | sed -e 's/00000070/VRRP/g' | sed 's/\(.*\),/\1\t/' | sed -e 's/^, //g'  
echo ;
echo -n "Protocoll      : ";
more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#' | awk '{printf "%s, \n", \$6}' 2>&1 | sort -n | uniq | tr -d '\n' | sed -e 's/0000002f/GRE/g' | sed -e 's/00000070/VRRP/g' | sed 's/\(.*\),/\1\t/' | sed -e 's/^, //g'
echo;
echo -n "Used Ports     : ";
more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#' | awk '{printf "%s %s, \n", \$5, \$6}' 2>&1 | sort -n | uniq | tr -d '\n' | sed -e 's/0000002f/GRE/g' | sed -e 's/00000070/VRRP/g' | sed 's/\(.*\),/\1\t/' | sed -e 's/^ , //g' | sed -e 's/0 ICMP, //g' | sed -e 's/0 IGMP, //g' | sed -e 's/0 VRRP, //g'
echo -e "\n\e[6m";echo -n " Counter";printf '%.s ' {1..124};echo -e "\e[0m";
echo -n '  TCP          : ';more /tmp/econn_ip.txt | grep 'TCP' |wc -l;
echo -n '  TCP  SYN     : ';more /tmp/econn_ip.txt | grep 'SYN_SENT' |wc -l;
echo -n '     SYN-ACK   : ';more /tmp/econn_ip.txt | grep 'SYN_ACK' |wc -l;
echo -n '     ACK       : ';more /tmp/econn_ip.txt | grep 'ESTAB' |wc -l;
echo -n '     FIN       : ';more /tmp/econn_ip.txt | grep 'FIN' |wc -l;
echo -n '  UDP          : ';more /tmp/econn_ip.txt | grep 'UDP' |wc -l
echo -n '  ICMP         : ';more /tmp/econn_ip.txt | grep 'ICMP' |wc -l;
echo -n '  IGMP         : ';more /tmp/econn_ip.txt | grep 'IGMP' |wc -l;
echo -n '  VRRP         : ';more /tmp/econn_ip.txt | grep '00000070)' |wc -l; 
echo -n '  GRE          : ';more /tmp/econn_ip.txt | grep '0000002f)' |wc -l;
echo -e "\e[6m";echo -n " Interface";printf '%.s ' {1..122};echo -e "\e[0m";
echo -n "Incomming      : ";
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[4];}' |grep in | sort |uniq > /tmp/econn_in
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[5];}' |grep in | sort |uniq >> /tmp/econn_in 
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[6];}' |grep in | sort |uniq >> /tmp/econn_in
more /tmp/econn_in | sort |uniq| awk '{split(\$1,c,"=") ;system("cat /tmp/econn_if |grep ^"c[2] ); }' |  awk '{split(\$0,d,":") ;print "," d[2] ;}' |sort | uniq| tr -d '\n' | sed -e 's/^, //g'
echo
echo -n "Outgoing       : ";
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[4];}' |grep out | sort |uniq > /tmp/econn_out
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[5];}' |grep out | sort |uniq >> /tmp/econn_out 
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ;print b[6];}' |grep out | sort |uniq >> /tmp/econn_out
more /tmp/econn_out | sort |uniq| awk '{split(\$1,c,"=") ;system("cat /tmp/econn_if |grep ^"c[2] ); }' |  awk '{split(\$0,d,":") ;print "," d[2] ;}' |sort |uniq | tr -d '\n' | sed -e 's/^, //g'
echo
echo -e "\e[6m";echo -n " Services";printf '%.s ' {1..123};echo -e "\e[0m";
echo -n "CP Service     : ";
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ; print b[3];}' |grep service |grep -v "(" | sort |uniq > /tmp/econn_service_used
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' |  awk '{split(\$0,b,",") ; print b[4];}' |grep service |grep -v "(" | sort |uniq >> /tmp/econn_service_used
more /tmp/econn_service_used | sort |uniq| awk '{split(\$1,c,"=") ;system("cat /tmp/econn_ports |grep ^"c[2] ); }' | awk '{split(\$0,b," ") ; print ", " b[2];}' | tr -d '\n' | sed -e 's/^, //g' > /tmp/econn_service_used_all 
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' | awk '{split(\$0,b,",") ; print b[3];}' |grep service |grep  "(" |sort |uniq | awk '{split(\$1,s2,"("); sub(/)/, "[[:blank:]]",s2[2]); service_id="^"s2[2]; system("cat /tmp/econn_ports |egrep "service_id)}' |awk '{split(\$0,b," ") ; print ", " b[2];}' | tr -d '\n' >> /tmp/econn_service_used_all
more /tmp/econn_ip.txt | awk '{split(\$0,a,";"); print a[2];}' | awk '{split(\$0,b,",") ; print b[4];}' |grep service |grep  "(" |sort |uniq | awk '{split(\$1,s2,"("); sub(/)/, "[[:blank:]]",s2[2]); service_id="^"s2[2]; system("cat /tmp/econn_ports |egrep "service_id)}' |awk '{split(\$0,b," ") ; print ", " b[2];}' | tr -d '\n' >> /tmp/econn_service_used_all
more /tmp/econn_service_used_all | sed -e 's/, FW1_omi-sic(40)//g' | sed -e 's/^, //g'
echo


fi

if [ \$SHOW_CONN == "1" ] ;
  then
    echo -e "\e[6m";echo -n " Connection Table";printf '%.s ' {1..115};echo -e "\e[0m";
    echo -e "\nRule     Proto        Source IP         S-Port   Destination IP         D-Port     Timeout            State   Interface in   Interface out      Service";
    printf '%.s-' {1..160};
    echo;
    more /tmp/econn_ip.txt | egrep -v '^\s*$|^#'| awk -f /opt/etool/script/econn_awk1 -v vsx_system="\$vsx_system" | sort -n | sed 's/^[1-9][0-9][0-9][0-9][0-9][0-9]/-imp->/g' | grep \$ENTRIE_GREP;
fi
if [ \$SHOW_GROUPED == "1" ] ;
  then
    echo -e "\e[6m";echo -n " Grouped by";printf '%.s ' {1..121};echo -e "\e[0m";
    # printf '%.s-' {1..50};echo -e "\nGrouped by ";printf '%.s-' {1..50};
    echo -e "\nSource Class C Networks:";
    more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#'| awk '{split(\$2,a,"."); printf "\t%s.%s.%s.0\n", a[1],a[2],a[3]}' 2>&1 | sort -n | uniq | sed -e 's/\.\.\.0//g' | sed -e 's/\.\.0\.0//g'
    echo -e "\nSource Class B Networks:";
    more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#'| awk '{split(\$2,a,"."); printf "\t%s.%s.0.0\n", a[1],a[2],a[3]}' 2>&1 | sort -n | uniq  | sed -e 's/\.\.\.0//g' | sed -e 's/\.\.0\.0//g'      
    echo -e "\nDestination Class C Networks:";
    more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#'| awk '{split(\$4,a,"."); printf "\t%s.%s.%s.0\n", a[1],a[2],a[3]}' 2>&1 | sort -n | uniq | sed -e 's/\.\.\.0//g' | sed -e 's/\.\.0\.0//g'     
    echo -e "\nDestination Class B Networks:";
    more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#'| awk '{split(\$4,a,"."); printf "\t%s.%s.0.0\n", a[1],a[2],a[3]}' 2>&1 | sort -n | uniq | sed -e 's/\.\.\.0//g' | sed -e 's/\.\.0\.0//g'
fi
if [ \$SHOW_IP == "1" ] ;
  then
    echo -e "\e[6m";echo -n " IP to IP";printf '%.s ' {1..124};echo -e "\e[0m\n";
    more /tmp/econn_ip.txt | awk '{print \$6 " "\$2 \$3 \$4 " "\$5 " "\$8}' | sed -e 's/src=//g' | sed -e 's/\],dest=\[/ /g' | sed -e 's/\],/ /g' | sed -e 's/)\;//g' | sed -e 's/\[//g'  | sed -e 's/rule\=/ /g' | sed -e 's/\,/ /g' | sed -e 's/state\=/ /g' | sed -e 's/Ifn[c,s]in\=[0-9]*//g' | sed -e 's/Ifn[c,s]out\=[0-9]*//g' | egrep -v '^\s*$|^#' | awk '{printf "%15s         -> \t%15s \n", \$2,\$4}' 2>&1 | sort -n | uniq  
fi
if [ \$DEL_CONN == "1" ] ;
  then
    OS=`cat /etc/cp-release | cut -c 17- | sed 's/^ *//g' | sed 's/\s*\$//g' | cut -c -3 | grep -c '^R8[1-9]'`
    if [[ \$OS == "1" ]] ; 
     then 
      if [[ \$FILTER_GREP == *"fgsdg"* ]] ;
        then
         echo -e "\e[6m";echo -n " Delete Connections";printf '%.s ' {1..114};echo -e "\e[0m\n";
         echo
         echo ">>>> ATTENTION <<<<"
         echo
         echo "This will clear all the connections matching the filter in the connection table!!!"
         echo -n "Are you sure (yes/no)? [n] "
         read DEL_CONN_1
         if [[ \$DEL_CONN_1 == "yes" ]] || [[ \$DEL_CONN_1 == "y" ]] ;
              then
                 echo;
                 echo -n "Are you really sure you want to do this (yes/no)? [n] "
                 FILTER="-x\$FILTER";
                    if [ -f /var/log/econn_delete_connections.txt ]; 
                       then
                          rm /var/log/econn_delete_connections.txt 2>&1> /dev/null;
                    fi
                 echo;
                 echo;
                 echo "###########################################################################################################";
                 echo "There is currently a bug in R81 and R80.10. This means"
                 echo "that deleting does not work correctly, because the filters"
                 echo "do not match. Therefore I have disabled the function."
                 echo;
                 echo "fw ctl contab \$FILTER";
                 echo
                 echo "More read here:"
                 echo "https://community.checkpoint.com/t5/General-Topics/fw-ctl-contab-x-issue-in-R81-10/m-p/128288#M23421"
                 echo;
                 echo "###########################################################################################################";
                 echo;
                 exit 1;
                 fw ctl conntab \$FILTER: > /var/log/econn_delete_connections.txt;
                 echo
                 more /var/log/econn_delete_connections.txt | grep "Nothing done." | sed -e 's/Are you sure (yes\/no)? \[n\] //g'
                 echo
                 echo "All deleted connections respectively the result are listed in the following file:"
                 echo "/var/log/econn_delete_connections.txt";
                 else
                 echo
                 echo "Nothing done.";
         fi
        else
         echo
         echo "You have set grep filter. This does not work with deleting the connections!";
         echo
         echo "Nothing done.";
      fi
     else
        echo "-x is only posible in R81 and above!"
  fi
fi 
echo;
EOT
[ -d "/opt/etool" ]  || mkdir /opt/etool;
[ -d "/opt/etool/script" ]  || mkdir /opt/etool/script; 
cat <<EOT > /opt/etool/script/econn_awk1
{
where=match(\$4, "TCP");
if (where !=0) {  rule=\$6 ; state=\$8; service=\$9 ; timer =\$5 ; proto="TCP"; dst=\$3; src=\$2; if_in=\$10;if_out=\$11; where=match(\$13, "out");  if (where !=0) {if_out=\$13 } } ;
where=match(\$4, "UDP");
if (where !=0) {  rule=\$6 ; state="state=---"; service=\$7 ; timer =\$5 ; proto="UDP"; dst=\$3; src=\$2; if_in=\$8;if_out=\$9; where=match(\$11, "out");  if (where !=0) {if_out=\$11 } } ;
where=match(\$4, "0000002f");
if (where !=0) {  rule=\$6 ; state="state=---"; service=\$7 ; timer =\$5 ; proto="GRE"; dst=\$3; src=\$2; if_in=\$8;if_out=\$9} ;
where=match(\$4, "00000070");
if (where !=0) {  rule=\$6 ; state="state=---"; service=\$7 ; timer =\$5 ; proto="VRRP"; dst=\$3; src=\$2; if_in=\$8;if_out=\$9}   ;
where=match(\$4, "ICMP");
if (where !=0) {  rule=\$6 ; state="state=---"; service=\$7 ; timer =\$5 ; proto="ICMP"; dst=\$3; src=\$2; if_in=\$8;if_out=\$9; where=match(\$11, "out");  if (where !=0) {if_out=\$11 } };
where=match(\$4, "IGMP");
if (where !=0) {  rule=\$6 ; state="state=---"; service=\$7 ; timer =\$5 ; proto="IGMP"; dst=\$3; src=\$2; if_in=\$8;if_out=\$9; where=match(\$11, "out");  if (where !=0) {if_out=\$11 } };
split(service,s,"=");
service=s[2];
sub(/,/, "", service);
where=match(\$service, ")");
if (where !=0) {split(service,s1,"("); service=s1[2];sub(/)/, "", service);}
split(state,h,"=");
state=h[2];
split(rule,h,"=");
rule=h[2];
where=match(\$9, "in");
if (where !=0) { if_in=\$9};
where=match(\$10, "in");
if (where !=0) { if_in=\$10};
where=match(\$11, "in");
if (where !=0) { if_in=\$11};
where=match(\$9, "out");
if (where !=0) { if_out=\$9};
where=match(\$10, "out");
if (where !=0) { if_out=\$10};
where=match(\$11, "out");
if (where !=0) { if_out=\$11};
where=match(\$12, "out");
if (where !=0) { if_out=\$12};
where=match(\$13, "out");
if (where !=0) { if_out=\$13};
split(if_in,h,"=");
if_in=h[2];
split(if_out,h,"=");
if_out=h[2];
split(src,h,"=");
split(h[2],h1,",");
src_ip=h1[1];
src_p=h1[2] ;
split(dst,h,"=");
split(h[2],h1,",");
dst_ip=h1[1];
dst_p=h1[2];
sub(/TCP_ESTABLISHED/, "ESTABLISHED", state);
sub(/,/, "", state);
sub(/,/, "", rule);
sub(/,/, "", timer);
sub(/,/, "", service);
sub(/\[/, "", src_ip);
sub(/\[/, "", dst_ip);
sub(/\]/, "", src_p);
sub(/\]/, "", dst_p);
sub(/,/, "", if_in);
sub(/,/, "", if_out);
read_file_into_array("/tmp/econn_if", File);
where=match(\$service, ")");
if (where ==0) {
read_file_into_array1("/tmp/econn_ports", File1);
service_last=File1[service];
}
else {
service_last=service;
}
if_out_last=File[if_out];
if (length(if_out_last) <= 0) {if_out_last="---";}
if_in_last=File[if_in];
if (length(if_in_last) <= 0) {if_in_last="---";}
if (length(service_last) <= 0) {service_last="---";}
if (proto == "icmp") { dst_p="---"; src_p="---"; }
printf "%.6s \t%6s \t%15s \t%6s \t%15s \t%6s \t%10s \t%11s \t%10s \t%10s \t%.15s \n", rule, proto, src_ip, src_p, dst_ip, dst_p, timer, state , if_in_last, if_out_last, service_last ;
service="";
rule="";
timer="";
state="";
proto="" ;
dst="" ;
src="";
if_in="";
if_out="";
}
function read_file_into_array(file, array     ,status, record, count ) {
   count  = 0;
   while (1) {
      status = getline record < file
      if (status == -1) {
         print "Failed to read file " file;
         exit 1;
      }
      if (status == 0) break;
      split(record,r,":");
      sub(/ /, "", r[1]);
      array[r[1]] = r[2];
   }
   close(file);
   return count
}
function read_file_into_array1(file, array     ,status, record, count ) {
   count  = 0;
   while (1) {
      status = getline record < file
      if (status == -1) {
         print "Failed to read file " file;
         exit 1;
      }
      if (status == 0) break;
      split(record,r," ");
      sub(/ /, "", r[1]);
      array[r[1]] = r[2];
   }
   close(file);
   return count
}
EOT
chmod 770 /usr/bin/econn
chmod 770 /opt/etool/script/econn_awk1

Version

0.1   08-08-2021     -    oneliner to show all connection table entries
                                       (ONELINER - Formatted Connection Table)
0.9    08-12-2021     -    Bugs fixed
1.0    08-26-2021     -    Version v1.0 - This version only shows info about certain rules
                                       (Easy Tool - Real time rule analysis v1.0)

2.0    08-25-2021     -    New version for filtering by rule, port, dst IP and src IP
2.1    08-26-2021     -    Bugs fixed
2.2    08-27-2021     -    Add -g grep parameter
2.3    08-28-2021     -    Add -x delete parameter
                                        (This parameter is only available from R81 and higher.)
2.4    08-28-2021     -    There is currently a bug in R81 and R81.10 with "fw ctl conntab -x -rule=3" 
                                        Therefore I have disabled this function -x.
                                        ('fw ctl contab -x' issue in R81.10)

2.5    09-01-2021     -    Bugs fixed (conn issue)
2.6    09-08-2021     -    Incoming and outgoing interface added
2.7    09-09-2021     -    Check Point service names added
2.8b  09-09-2021     -    Bugs fixed
                                        ( --> more \$FWDIR/state/__tmp/FW1/ )
2.9    09-10-2021     -    Now  with extended connection table view:
                                        incoming interface, outgoing interface, Check Point service name
2.9i   09-10-2021     -    Bugs fixed
                                        (ICMP issues, interface issue, Check Point service issue)

3.0    09-11-2021     -    VSX support
3.1    09-11-2021     -    Bugs fixed
                                        (option -g issue, VSX "fw ctl conntab" issue)
3.2    09-12-2021     -    Bugs fixed
                                        ( option -r /-s /-d /-p /-g issue)
3.3    09-13-2021     -    Design modification

4.0    09-15-2021     -    File read and write, added -n no summary output
4.0f   09-16-2021     -    Performance optimization of the script for large connection tables.
4.0g  09-23-2021     -    Add -h option
4.0h  14-11-2021     -    Performance optimization for VSX environments

[Igor_Pr]

About the voting I found this tool.
Is very helpful. 👍

[Venkata]

Nice script.

[M_Markusevic]

We use a Fufin to analyze the rules. In combination with this script we could easily clean up our ruleset. Is really a helpful tool. 

Thanks @HeikoAnkenbrand for all the contributions.

[HeikoAnkenbrand]

Now, version 4.0h with performance optimization for VSX environments.

[genisis__]

I used the auto-installer to install the tools, which seemed to work, however when I ran 'econn', I received this error:

Incomming : sh: -c: line 0: syntax error near unexpected token `('
sh: -c: line 0: `cat /tmp/econn_if |grep ^domain-tcp(121)'

I've run this on a R81 (open server) with JHFA34 installation.

[udo_kimmich]

We use it for analysis in our company.
With version 4.0 the performance of the tool is greatly improved.

Thanks for that!

[rami]

Nice tool 👍

[Rasputin]

Top tool.

[ori1]

Very nice tool.

[joschuar]

Hi @HeikoAnkenbrand,

The -x delete option does not work.

[MaxM]

This should be installed by Check Point by default.

[_Val_]

@MaxM we already have cpview 🙂

[Thonse]

Great work.