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kobilevi
Participant
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Tcpdump + Zdebug

Hi Checkmates !

I wanted to know if Checkpoint has a complete guide to tcpdump and zdebug

Anyone know of one?
Thanks

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Chris_Atkinson
Employee Employee
Employee

Note tcpdump isn't specific to check point.

We recommend using CPPCAP (sk141412) as an alternative 

CCSM R77/R80/ELITE

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the_rock
Legend
Legend

Can you explain please? What kind of guide? You can refer to below

https://gist.github.com/tuxfight3r/9ac030cb0d707bb446c7

 

 

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kobilevi
Participant

hi

Hi I am looking for a complete guide for beginners to zdebug and tcpdump for checkpoint gateways 

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the_rock
Legend
Legend

Just google it, bunch of links come up with useful flags.

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Oliver_Fink
Advisor
Advisor

Maybe you want to use cppcap instead of tcpdump. Have a look at sk141412: cppcap - A Check Point Traffic Capture Tool

It uses pcap-filter(7) as syntax and has no hassle with SecureXL.

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G_W_Albrecht
Legend
Legend

tcpdump is not a CP software 😉

sk100808: How to use " fw ctl zdebug" command

sk30583: What is FW Monitor?

 

CCSE CCTE CCSM SMB Specialist
Timothy_Hall
Champion
Champion

You may want to check out my 2021 CPX presentation here which summarizes the packet capturing options on Check Point:

https://community.checkpoint.com/fyrhh23835/attachments/fyrhh23835/member-exclusives/484/2/CPX_Preso...

This presentation was derived from my self-guided video series "Max Capture: Know Your Packets" which thoroughly covers all the packet capture tools including tcpdump along with fw ctl zdebug + drop as well.  There are also free updates to the original class available here:

Max Capture Update 1: Taking "Triggered" Packet Captures

Max Capture Update 2: Debug Filter Battle -- fw monitor -F vs. fw ctl zdebug + drop

Gateway Performance Optimization R81.20 Course
now available at maxpowerfirewalls.com
Vladimir_S
Contributor

tcpdump link is the broken.

Vlad.

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Chris_Atkinson
Employee Employee
Employee

Note tcpdump isn't specific to check point.

We recommend using CPPCAP (sk141412) as an alternative 

CCSM R77/R80/ELITE
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PhoneBoy
Admin
Admin

Looks like an SK that isn't on the new Support Center as of yet.
I've reported this issue internally.
Meanwhile, you should be able to see it here: https://supportcenter.us.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&so...

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Blason_R
Leader
Leader

Well there are bunch of ATRG available in support center. Those are more than enough to start with and then as suggested by community google can be your best friend. I specifically have learned using r&d on test setup.

Thanks and Regards,
Blason R
CCSA,CCSE,CCCS
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