Concurrent connection number problem

[Koldo Navarro]

when adquired Unix, we adquired network connection licences enough to get all our users connected, but when there are about 42 users the system does not let making more concurrent connections.

It show's the message:

"Telnetd:All network ports in use"

How can I know how many connections I've got?
How can I which process are using those connections?

[Michael Schulte zur Sur]

Hi,

what os release do you have?
If I remember right, you will have to create additional terminal devices.
cd /dev
./MAKEDEV ptyx x=1-...
You can see with w how many telnet session you have.

greetings,

Michael

[Ralf Puchner]

all network ports in use has nothing in common with licenses!

There is a port-resource bottleneck, maybe your clients hangup without correct handshaking, leading to a network problem.
Another possiblity in case of a v4.x system is addressed by michaels answer (or within the admin guide explaining it in detail).

Please post output of netstat -i and netstat -a all other is pure guess...

[Koldo Navarro]

You're right all.

I had a look into the /dev directory, and I saw lots of tty devices, but the minor number was wrong. It began with 0 to 48, and jumped to a number higher than 400.

I removed all those wrong devices and MAKEDEV them again. Now, their minus number seem to be well. It begins from 0 and goes straight up with no jumps.

Thank you very much.

[Michael Schulte zur Sur]

Hi,

just for your information, read this to get to know a special feature of this forum:
http://forums1.itrc.hp.com/service/forums/helptips.do?#28

greetings,

Michael

[Tony Warren_3]

I too have the same problem having exceeded the number of ports.

I did a MAKEDEV pty_3 which created the next series of device files(both alphabetically and minor-wise).

Having stopped and restarted inetd, the system still doesn't seem to be using these new ports.

I'm assuming this doesn't require a reboot to use these new device files???

I am running V4.0 1229 on an Alpha box.

Thanks,
Tony.

[Ralf Puchner]

be sure there are no holes within numbering between the devices, but this is well documented within the admin guide (maybe time to read it).