VPN Debugger can be used on Check Point Gateways to collect debug information, which is one of the most critical steps in troubleshooting both Client-to-Site(IPSec or SSL) and Site-to-Site VPN issues.
In addition, the debug tool includes a built-in feature to quickly collect CPINFO, enabling faster and more efficient support workflows.
Note: One-time before running the script
Expert mode: chmod +x cp_vpn_debugger.py
Expert mode: dos2unix cp_vpn_debugger.py
Example for Client to Site Debug;
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Check Point VPN Debug Tool
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1) Site to Site VPN (S2S)
2) Client to Site VPN (C2S)
3) Collect CPINFO
0) Exit
Select an option: 2
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Client to Site VPN
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1) IPSec
2) Mobile Access (SSL)
0) Back
Select an option: 1
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S2S / C2S-IPSec Debug ENABLE
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[CMD] vpn debug trunc
[CMD] vpn debug on TDERROR_ALL_ALL=5
[CMD] ike debug trunc ALL=5
Debug ENABLED
Reproduce the issue now.
Press [Q] to STOP debug
Stopping debug...
[CMD] vpn debug truncoff
[CMD] vpn debug off
[CMD] vpn debug ikeoff
[CMD] ike debug off
[CMD] cp -v /opt/CPsuite-R81.20/fw1/log/ike* /var/log/C2S_IPSEC_20251219_130552/ 2>/dev/null
'/opt/CPsuite-R81.20/fw1/log/iked0.elg' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.elg'
'/opt/CPsuite-R81.20/fw1/log/iked0.elg.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.elg.0'
'/opt/CPsuite-R81.20/fw1/log/iked0.ikev1trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.ikev1trace'
'/opt/CPsuite-R81.20/fw1/log/iked0.ikev1trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.ikev1trace.0'
'/opt/CPsuite-R81.20/fw1/log/iked0.ikev2trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.ikev2trace'
'/opt/CPsuite-R81.20/fw1/log/iked0.ikev2trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked0.ikev2trace.0'
'/opt/CPsuite-R81.20/fw1/log/iked1.elg' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.elg'
'/opt/CPsuite-R81.20/fw1/log/iked1.elg.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.elg.0'
'/opt/CPsuite-R81.20/fw1/log/iked1.ikev1trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.ikev1trace'
'/opt/CPsuite-R81.20/fw1/log/iked1.ikev1trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.ikev1trace.0'
'/opt/CPsuite-R81.20/fw1/log/iked1.ikev2trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.ikev2trace'
'/opt/CPsuite-R81.20/fw1/log/iked1.ikev2trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked1.ikev2trace.0'
'/opt/CPsuite-R81.20/fw1/log/iked2.elg' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.elg'
'/opt/CPsuite-R81.20/fw1/log/iked2.elg.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.elg.0'
'/opt/CPsuite-R81.20/fw1/log/iked2.ikev1trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.ikev1trace'
'/opt/CPsuite-R81.20/fw1/log/iked2.ikev1trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.ikev1trace.0'
'/opt/CPsuite-R81.20/fw1/log/iked2.ikev2trace' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.ikev2trace'
'/opt/CPsuite-R81.20/fw1/log/iked2.ikev2trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/iked2.ikev2trace.0'
[CMD] cp -v /opt/CPsuite-R81.20/fw1/log/vpnd* /var/log/C2S_IPSEC_20251219_130552/ 2>/dev/null
'/opt/CPsuite-R81.20/fw1/log/vpnd.elg' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.elg'
'/opt/CPsuite-R81.20/fw1/log/vpnd.elg.0' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.elg.0'
'/opt/CPsuite-R81.20/fw1/log/vpnd.ikev1trace' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.ikev1trace'
'/opt/CPsuite-R81.20/fw1/log/vpnd.ikev1trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.ikev1trace.0'
'/opt/CPsuite-R81.20/fw1/log/vpnd.ikev2trace' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.ikev2trace'
'/opt/CPsuite-R81.20/fw1/log/vpnd.ikev2trace.0' -> '/var/log/C2S_IPSEC_20251219_130552/vpnd.ikev2trace.0'
[CMD] cp -v /opt/CPsuite-R81.20/fw1/log/legacy_ike* /var/log/C2S_IPSEC_20251219_130552/ 2>/dev/null
[CMD] tar czf /var/log/C2S_IPSEC_20251219_130552.tar.gz -C /var/log C2S_IPSEC_20251219_130552
[+] Logs collected: /var/log/C2S_IPSEC_20251219_130552.tar.gz
Press ENTER to return to menu
