Messages in this thread | | | Date | Wed, 06 Jul 2005 16:30:21 +0400 | From | Michael Tokarev <> | Subject | sent an invalid ICMP type 11, code 0 error to a broadcast: 0.0.0.0 on lo? |
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On our gateway machine, wich is running 2.6 kernel, I'm seeing quite several messages like this:
kernel: 192.168.4.2 sent an invalid ICMP type 11, code 0 error to a broadcast: 0.0.0.0 on lo last message repeated 3 times kernel: 192.168.4.2 sent an invalid ICMP type 11, code 0 error to a broadcast: 0.0.0.0 on lo last message repeated 3 times
kernel: 81.13.90.174 sent an invalid ICMP type 11, code 0 error to a broadcast: 0.0.0.0 on lo gate last message repeated 10 times
kernel: 81.13.90.174 sent an invalid ICMP type 11, code 0 error to a broadcast: 0.0.0.0 on lo last message repeated 9 times
All the IP addresses mentioned are local to this box. It's always like this, type11 code0 to 0.0.0.0 on lo.
The box is a gateway, which have "external" interface, several "LAN" ifaces, DMZ, dialin modem pool and accepts vtund connections. And it has iptables-based firewall and NAT enabled. Here's a lis of network-related modules:
ppp_deflate 4736 0 zlib_deflate 21528 1 ppp_deflate zlib_inflate 16640 1 ppp_deflate ppp_async 8576 0 crc_ccitt 1920 1 ppp_async ppp_generic 19860 2 ppp_deflate,ppp_async slhc 6144 1 ppp_generic tun 8320 13 crc32 3968 1 tun ipt_ECN 2944 163 iptable_mangle 2304 1 ipt_REJECT 4096 1 ipt_LOG 6272 3 ipt_state 1664 3 ipt_comment 1536 22 iptable_filter 2432 1 iptable_nat 19420 1 ipt_NOTRACK 1920 3 iptable_raw 1792 1 ip_tables 18304 10 ipt_ECN,iptable_mangle,ipt_REJECT,ipt_LOG,ipt_state,ipt_comment,iptable_filter,iptable_nat,ipt_NOTRACK,iptable_raw md5 3840 1 ipv6 218688 12 ip_conntrack 37560 3 ipt_state,iptable_nat,ipt_NOTRACK aes_i586 38656 1 airo 63520 0 3c509 11476 0
I've seen several posts about problems *like* this, but they're all not from the same box (usually it's some problem with *another* device on the network which is sending bogus packets, or with hubs/switches or cables). In this case, it looks like it is this same box who's generating those bad packets.
So far, I wasn't able to relate this message with any particular network activity. It happens "randomly".
What it can be?
Thanks.
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