--- Mike Klinke <lsomike@xxxxxxxxxx> wrote: > On Thursday 05 February 2004 18:57, Jeremy wrote: > > --- Mike Klinke <lsomike@xxxxxxxxxx> wrote: > > > 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 > > > > > > > > watching the connection via tcpdump? > > > > No, I'm not familiar enough with tcpdump's syntax to know what to > > look for. What command line options should I use? > > Well one approach could be to monitor all traffic with the remotely > logged in host. For example on the server run: > > tcpdump -nX host <client_ip> -i <interface(eth0 for example)> Ok, I did that. There is -no- traffic when the disconnect happens, or anytime before. After I logged in, the traffic stopped, after 10 minutes, I went back, hit enter, and got kicked off. But alas, it still did not generate any traffic in tcpdump. I tried the other fellow's idea of turning on the keepalive in Putty. That helped, but not everyone connecting to my server has PuTTY, my server is also a MUD hos, and people connecting with other clients to their MUDs are getting kicked off every 10 minutes of inactivity. I noticed that no-one commented on the NAT teardown question. What is a NAT teardown? Is it possible to change NAT settings, or is it even possible that is the problem. I've seen this discussed on some older forums, and saw several people say they fixed it, that it was a NAT teardown problem, but never saw anything that indicated -how- they fixed it. -Jeremy __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html
