Linux

Ask something
Discussion Locked

Telnet Port Availability

0 helpful
5 replies

by sgandenberger

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.

We are run SCO UNIX Open Server 5.0.2. The UNIX Server hosts our Accounting and ERP Package. Users use a terminal emulator to telnet to the SCO box and access the programs. When usage is heavy some users will receive the following error message:
telnetd: All network ports in use.

Connection closed by host

I assume that we are exceeding some a limit set for the number of telnet connections allowed at one time. Can anyone tell me if this limit can be increased? And if it can be increased, how to do it in this version of SCO Uniox?

5 replies

by maxwell edison

I won't suggest that I know a lot about your problem, but I did do a search and found a couple of suggestions:

If you get a message saying that all network ports are in use, you've either run out of pseudo devices or you haven't started devc-pty.The telnetd daemon looks only at the pseudo-terminal devices named /dev/pty[pqrs][0-f], no matter how many others are created.

http://www.qnx.com/developer/docs/qnx_6.1_docs/neutrino/utilities/d/devc-pty.html

http://www.qnx.com/developer/docs/qnx_6.1_docs/neutrino/utilities/t/telnetd.html

REMOVE SPACES from the pasted URLs.

----------

From another source:

MAKEDEV PTY_n

by pj

It looks like you are running out of sockets. Others have recommended that you
increase your number of pseudo-ttys, but that's not what you're running
out of. (You might want to increase it anyway.)

You need to run `netconfig`, click on "SCO TCP/IP" below your NIC (not
the one below "Loopback driver"). Then go to [Protocol -> Modify
protocol configuration] and raise the number of TCP connections. You
can also raise the number of pseudo ttys here. These thing scost a bit
of memory,but not terribly much. Try setting TCP connections to 1024,
pseudo ttys to 512.

This discussion is closed to new replies.