An incoming connection chews up an file descripter but does not require an ephemeral port.
You can trivially have more that 65k incoming connections on a linux box, but you've only got 64511 ports per ip on the box, to use for outgoing connections. I've seen boxes supporting more than a million connections with tuning in the course of normal operation. On 10/14/10 9:03 AM, johnd...@hush.ai wrote: > Hi, > > I am somewhat new to networking. I have interest in running a > Bittorrent tracker. I ran one for a bit, and my one Linux box > running Opentracker gets overloaded. My connection is good, and > most of it isn't being used. Just a lot of people connect, and use > up all the 65k "free connections". I tried messing with the > sysctls, but it didn't help too much (and just degraded the > connection quality for everyone). It is not a malicious attack > either as there is only a few connections per IP and they are > sending proper Bittorrent tracker requests... > > So what can I do? How can I have have open more than 65k concurrent > connections on standard GNU/Linux? > > Thanks for any ideas and suggestions. > > -John > >
