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Thystra
Asked: 2024-10-04 10:42:17 +0800 CST

Find specific rule in iptables reported by trace

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I'm trying to troubleshoot a firewall rule causing packets to drop.

I set up TRACE and got the following:

 TRACE: 1 79de9f86 filter:input:rule:0x17:DROP

How do I find which specific rule is referenced and causing the dropped packets?

networking

1 Answers

  1. Best Answer

    Ubuntu is now using 'nft', not iptables.

    #nft monitor trace

    showed which table and rule was causing the drop.

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