On Thursday 05 February 2004 16:49, Jeremy wrote: > Alright, I'm using Fedora Core 1. My box is setup as a router for > the rest of my network. It has two network cards, one 10 base card > connected to a cable modem, and another 10/100 connected to my > network switch. I have iptables setup to do masquerading. > > The problem... > > Telnet/SSH connections to the machine, from the outside world, > disconnect after 5-10 minutes of inactivity. For example, I can > have 3 SSH connections to my box, neglect one window for a few > minutes, and when I go to that window and start typing, I get a > message from PuTTY saying I got disconnected. > > I've looked extensivly on the net trying to figure out what's wrong > and how to fix it. I've come across a couple sites saying that > this could possibly be caused by a 'NAT teardown'. I'm new to > iptables and NAT, so i'm not exactly sure what this means. I was > under the impression that NAT timeouts on CONNECTED connections was > like 5 days of inactivity before it would drop. When I cat > /proc/net/ip_conntrack, i see my connections, and I see they have > very high timeouts. > > I've looked through the iptables man page, as well as the > iptables/netfilter website, and i can't find anything relevent to > this. Does anyone know how I might fix this? > > -Jeremy > Have you tried: using an application other than Putty? from another machine? connecting in the opposite direction? watching the connection via tcpdump? These may help to see what's going on. Regards, Mike Klinke
