https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268072#M1335 <P>This script gives connection tests output with Linux netcat command. Please run dos2unix/chmod 777 before running it.</P> <P>Lab output:</P> <P>dos2unix: converting file gaia_nc_tests.sh to Unix format ...<BR />[Expert@LIN_FW_01:0]# ./gaia_common_nc_tests.sh<BR />2026-01-21 09:34:57 nc binary: nc<BR />2026-01-21 09:34:57 timeout=3s parallel=12 retries=1 profile=default no_dns=0 source_ip=none<BR />2026-01-21 09:34:57 == DNS resolver tests (UDP/53 and TCP/53) ==<BR />2026-01-21 09:34:57 | udp | 8.8.4.4 | 53 | DNS UDP/53 - Google Public DNS (Secondary) | SENT | 16022ms<BR />2026-01-21 09:34:57 | udp | 8.8.8.8 | 53 | DNS UDP/53 - Google Public DNS | SENT | 16024ms<BR />2026-01-21 09:34:57 | tcp | 8.8.8.8 | 53 | DNS TCP/53 - Google Public DNS | OPEN | 16030ms<BR />2026-01-21 09:34:57 | udp | 149.112.112.112 | 53 | DNS UDP/53 - Quad9 DNS (Secondary) | SENT | 16025ms<BR />nc: dns.google [8.8.8.8] 53 (domain) open<BR />2026-01-21 09:34:57 | udp | 1.1.1.1 | 53 | DNS UDP/53 - Cloudflare DNS | SENT | 16031ms<BR />2026-01-21 09:34:57 | udp | 9.9.9.9 | 53 | DNS UDP/53 - Quad9 DNS | SENT | 16026ms<BR />2026-01-21 09:34:57 | udp | 1.0.0.1 | 53 | DNS UDP/53 - Cloudflare DNS (Secondary) | SENT | 16031ms<BR />2026-01-21 09:34:57 | tcp | 8.8.4.4 | 53 | DNS TCP/53 - Google Public DNS (Secondary) | OPEN | 16038ms<BR />2026-01-21 09:34:57 | tcp | 1.0.0.1 | 53 | DNS TCP/53 - Cloudflare DNS (Secondary) | OPEN | 16035ms<BR />2026-01-21 09:34:57 | tcp | 1.1.1.1 | 53 | DNS TCP/53 - Cloudflare DNS | OPEN | 16036ms<BR />nc: dns.google [8.8.4.4] 53 (domain) open<BR />nc: one.one.one.one [1.0.0.1] 53 (domain) open<BR />nc: one.one.one.one [1.1.1.1] 53 (domain) open<BR />2026-01-21 09:34:57 | tcp | 149.112.112.112 | 53 | DNS TCP/53 - Quad9 DNS (Secondary) | OPEN | 16047ms<BR />2026-01-21 09:34:57 | tcp | 9.9.9.9 | 53 | DNS TCP/53 - Quad9 DNS | OPEN | 16049ms<BR />nc: dns.quad9.net [149.112.112.112] 53 (domain) open<BR />nc: dns9.quad9.net [9.9.9.9] 53 (domain) open<BR />2026-01-21 09:35:13 | udp | 208.67.222.222 | 53 | DNS UDP/53 - OpenDNS | SENT | 16032ms<BR />2026-01-21 09:35:13 | tcp | 208.67.222.222 | 53 | DNS TCP/53 - OpenDNS | OPEN | 16036ms<BR />nc: dns.sse.cisco.com [208.67.222.222] 53 (domain) open<BR />2026-01-21 09:35:13 | udp | 208.67.220.220 | 53 | DNS UDP/53 - OpenDNS (Secondary) | SENT | 16032ms<BR />2026-01-21 09:35:13 | tcp | 208.67.220.220 | 53 | DNS TCP/53 - OpenDNS (Secondary) | OPEN | 16038ms<BR />nc: resolver2.opendns.com [208.67.220.220] 53 (domain) open<BR />2026-01-21 09:35:29 == Web tests (TCP/443 and TCP/80) ==</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>&nbsp;</P> <P>2026-01-21 09:35:29 | tcp | <A href="http://www.cloudflare.com" target="_blank" rel="noopener">www.cloudflare.com</A> | 80 | HTTP - Cloudflare Web | OPEN | 24052ms<BR />nc: Warning: Inverse name lookup failed for `104.16.124.96' Warning: Inverse name lookup failed for `104.16.123.96' <A href="http://www.cloudflare.com" target="_blank" rel="noopener">www.cloudflare.com</A> [104.16.124.96] 80 (http) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.cloudflare.com" target="_blank" rel="noopener">www.cloudflare.com</A> | 443 | HTTPS - Cloudflare Web | OPEN | 24055ms<BR />nc: Warning: Inverse name lookup failed for `104.16.123.96' Warning: Inverse name lookup failed for `104.16.124.96' <A href="http://www.cloudflare.com" target="_blank" rel="noopener">www.cloudflare.com</A> [104.16.123.96] 443 (https) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.github.com" target="_blank" rel="noopener">www.github.com</A> | 80 | HTTP - GitHub Web | OPEN | 24076ms<BR />nc: <A href="http://www.github.com" target="_blank" rel="noopener">www.github.com</A> [140.82.113.3] 80 (http) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.microsoft.com" target="_blank" rel="noopener">www.microsoft.com</A> | 443 | HTTPS - Microsoft Web | OPEN | 24082ms<BR />nc: <A href="http://www.microsoft.com" target="_blank" rel="noopener">www.microsoft.com</A> [104.88.157.251] 443 (https) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.github.com" target="_blank" rel="noopener">www.github.com</A> | 443 | HTTPS - GitHub Web | OPEN | 24088ms<BR />nc: <A href="http://www.github.com" target="_blank" rel="noopener">www.github.com</A> [140.82.113.3] 443 (https) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.microsoft.com" target="_blank" rel="noopener">www.microsoft.com</A> | 80 | HTTP - Microsoft Web | OPEN | 24146ms<BR />nc: <A href="http://www.microsoft.com" target="_blank" rel="noopener">www.microsoft.com</A> [104.88.157.251] 80 (http) open</P> <P>&nbsp;</P> <P>&nbsp;</P> <P><BR />2026-01-21 09:35:29 | tcp | support.checkpoint.com | 443 | HTTPS - Check Point Support | OPEN | 72164ms<BR />nc: support.checkpoint.com [13.227.246.38] 443 (https) open<BR />2026-01-21 09:35:29 | tcp | support.checkpoint.com | 80 | HTTP - Check Point Support | OPEN | 72196ms<BR />nc: support.checkpoint.com [13.227.246.28] 80 (http) open</P> <P>&nbsp;</P> <P>&nbsp;</P> <P><BR />2026-01-21 09:35:29 | tcp | <A href="http://www.google.com" target="_blank" rel="noopener">www.google.com</A> | 443 | HTTPS - Google Web | OPEN | 104300ms<BR />nc: <A href="http://www.google.com" target="_blank" rel="noopener">www.google.com</A> [192.178.192.106] 443 (https) open<BR />2026-01-21 09:35:29 | tcp | <A href="http://www.google.com" target="_blank" rel="noopener">www.google.com</A> | 80 | HTTP - Google Web | OPEN | 104329ms<BR />nc: <A href="http://www.google.com" target="_blank" rel="noopener">www.google.com</A> [192.178.192.105] 80 (http) open<BR />2026-01-21 09:37:14 == Summary ==<BR />2026-01-21 09:37:14 OPEN/OPEN? : 0<BR />2026-01-21 09:37:14 SENT (UDP) : 0<BR />2026-01-21 09:37:14 FAILED : 0<BR />2026-01-21 09:37:14 SKIPPED : 0<BR />2026-01-21 09:37:14 Done.</P> Wed, 11 Feb 2026 00:14:46 GMT the_rock 2026-02-11T00:14:46Z https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268072#M1335 3 Wed, 11 Feb 2026 00:14:46 GMT https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268072#M1335 the_rock 2026-02-11T00:14:46Z https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268169#M1342 <P>Netcat is a very useful tool...that can help with useful things like this.</P> Wed, 21 Jan 2026 22:14:54 GMT https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268169#M1342 PhoneBoy 2026-01-21T22:14:54Z https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268173#M1344 <P>I feel its super underrated, but so powerful.</P> Wed, 21 Jan 2026 22:18:28 GMT https://community.checkpoint.com/t5/Scripts/Gaia-netcat-connectivity-test-script/m-p/268173#M1344 the_rock 2026-01-21T22:18:28Z