Redhat Telnet Configuration

rymus

Having an annoying problem with an installation of redhat; only annoying in that we havent come across it before. We have a fairly powerful redhat 9 server that, after it accepts about 50/60 telnet sessions, it'll do no more. It might even go up higher than that but shortly after a dozen or so users will get disconnected. It's on a 100mbit lan (it might even be 1gbit) but most of the users will connect in over leased line or broadband. We need 100 or so concurrent users. I've had a look around the xinetd config files but can't find anything decent. Anyone have any ideas?

roamer

have you tried a diferent NIC?

rymus

nope.. it's a dell poweredge with an integrated nic... I can only presume it's a 10/100/1000

rymus

not t'worry, apparently it was sorted by some fiddling around. You'd think people would have the decency to tell me...

Red Alert

you shouldn't be using telnet AT ALL. :eek:

rymus

<-- blue in face from telling bossman the same thing.

niallb

I know its sorted, but this is possibly how it was done.

You can add an 'instances' value to your
xinetd.conf or your xinetd.d/telnet file.

Raise it to the number of connections you feel you can reasonably handle.

disable = no
instances = 100

xinetd also has a total limit on the number of
connections it will allow over all its services, so if this doesn't work, you need to set a higher
'limit' value when xinetd is launched.

NiallB

rymus

spot on.

dubhthach

rymus wrote:

<-- blue in face from telling bossman the same thing.

Well you could see if you run into the same issue with ssh, if you don't then it's a sly way to force telnet to be gotten rid of. Least that way you kill two birds with one stone (number of connections, and the fact that ye using telnet of all things)

rymus

only thing thats stopping me is that I'm not sure if the system we currently run on telnet will run exactly the same over ssh. I'd bare the relative crappyness of telnet if it meant I wouldnt have a whole raft of new installation problems down the road. Choices choices

dubhthach

rymus wrote:

only thing thats stopping me is that I'm not sure if the system we currently run on telnet will run exactly the same over ssh. I'd bare the relative crappyness of telnet if it meant I wouldnt have a whole raft of new installation problems down the road. Choices choices

What sorta system is it? (not going into details necessarily). In general if it's something that's ran off the CLI i would say it would probably work no problems in ssh as in telnet. If however for installation it requires the presence of a telnetd then you could have it installed but just not enabled.