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"ping: sendmsg: Operation not permitted" on MDK10

Guest schweini

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Guest schweini

i have an old pentium running as a router here in our LAN, and a couple of minutes after starting up a BitTorrent client (Azureus) on a amachone connected to that router, my internet connectivity start to break down drastically. So i logged on to the router as root, and when i started pinging some random host, i always get:


ping: sendmsg: Operation not permitted


messages. once in a while a packet seems to get through, but ost of the time nothing.


when i kill Azureus, after ca. a minute everything's working fine again.


my guess is that i'm running into some connection-limit on the router-box, but i have no idea which, and how to change it.


the router is a Pentium 1, 200MHz, 64MB RAM, which should be more than enough for routing our 1MBit connection.


I set up routing manually (not via the connection sharing wizard)


anyone with any ideas what is wrong?

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Guest schweini

darn. should've checked my logs first! :-)


for future reference, in case someone runs into the same issue:


my syslog showed a lot of

ip_conntrack: table full, dropping packet



the problem is that netfilter ran into it's limit of connections in can track. this number is specified in


mine was set at some rather low value. i simply did a

echo "8192" > /proc/sys/net/ipv4/ip_conntrack_max

and everything is fine and dandy.

the embarassing thing is that it's a netfilter FAQ. more info at:


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