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On Friday 22 Feb 2013 15:51:54 Tanstaafl wrote: |
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> Hi all, |
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> |
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> Weird, I don't use it much, but needed to run a traceroute today, and it |
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> is failing with: |
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> |
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> # traceroute 192.168.1.4 |
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> traceroute to 192.168.1.4 (192.168.1.4), 30 hops max, 60 byte packets |
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> send: Operation not permitted |
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> |
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> I know the problem is in my firewall, because when I stop it, |
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> traceroutes work as expected. |
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> |
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> I have allowed all ICMP in my firewall: |
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> |
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> Chain INPUT (policy DROP) |
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> target prot opt source destination |
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> <snip> |
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> ACCEPT icmp -- anywhere anywhere icmp any |
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> <snip> |
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> |
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> Chain FORWARD (policy DROP) |
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> target prot opt source destination |
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> ACCEPT icmp -- anywhere anywhere icmp any |
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> |
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> Chain OUTPUT (policy DROP) |
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> target prot opt source destination |
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> <snip> |
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> ACCEPT icmp -- anywhere anywhere icmp any |
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> |
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> Any ideas what I'm missing? |
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> |
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> I can send all of my firewall rules privately if someone thinks I may |
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> have something that is dropping these packets before my ALLOW rule kicks |
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> in, but I'm fairly sure I have them right... |
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> |
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> Thanks |
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|
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I don't know how 'clever' your firewall script is (if indeed you are using a |
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script) and it interferes with your sysctl settings. |
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|
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Search for things like: |
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|
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net.ipv4.icmp_echo_ignore_all = 0 |
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net.ipv4.icmp_echo_ignore_broadcasts = 1 |
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|
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|
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Alternatively, do you have another rule that denies connections from private |
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address space on the particular interface? |
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-- |
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Regards, |
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Mick |
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