[olug] server not accepting connections past certain point

[Charles Bird]

My problem child which is a v-server on linode is giving me 
problems.  I am running gentoo, no gui. I'm running 
services like apache2, my_sqld, and verlihub for DC 
protocol... 
   Its up and running after weeks of compiling and 
tweaking, started out with 5 users, then 10, then 25, she 
pegged out at 1020 and i was stumped...should be able to do 
5000+ connections.  I changed ulimit -n to 10240 instead of 
1024, fixed that problem. 
Now I cant get past 1750 connections, i tried pinging 
another server in the chicago area and got: 
# ping 66.90.66.1  
PING 66.90.66.1 (66.90.66.1) 56(84) bytes of data.  
ping: sendmsg: Operation not permitted  
ping: sendmsg: Operation not permitted  
ping: sendmsg: Operation not permitted  
ping: sendmsg: Operation not permitted  
ping: sendmsg: Operation not permitted  
ping: sendmsg: Operation not permitted  
 
Connecting to hub usually times out, cant ping hub from 
outside, but yet there are users on there and there is not 
much lag at all, pretty snappy. 
I dont see any iptables, chains, etc.  
loads are not bad.  
checked conf for the hub software and is setup for max user 
count of 10000+ 
 
Does anyone know where i should start for trouble shooting? 
Any magic commands? =D   

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