ftp/telnet fails, then starts working again

[Kellogg Unix Team]

Are you using IPv6 ? I observed similar behaviour while installing wu-ftp on a solaris box with IPv6 turned on. Is the server HP or Sun ? :-)

...Manjeet

[Rory R Hammond]

I have seen similar problems. But I had clues in the syslog.
But your syslogd.conf file might be configured differntly.

npty is not the only setting to look at.
nstrpty was the culprit on 10.2
nstrtel was the culprit on
11.11i

He is test to try.
At one site, my nstrtel was set at the default of 60.

"who |wc" showed 58 login.

I recursively telneted to localhost, until I reached that limit.
I bet your logins are failing at peak times of the day, when you have reached you kernel limits

[Sheri Gearhart]

I am using IPV4 on all systems (Solaris or HP).

This server is an HP Superdome w/ 11i.

Rory, thanks for the info.
nstrtel = 200
nstrpty = 60

[Shannon Petry]

First, check for a machine with duplicate IP's and macs.
arp -a from a client which can not connect, and look at this compared to the output of lanscan for MACS.
For duplicate IP's check the network logs with
netfmt /var/adm/nettl.LOG00 |more

Next, check resolution on the client side. A while back I had a bunch of window$ users who were not able to connect to my SUN nor any HP's. There was a misconfigured WINS server, and DHCP server causing all kinds of problems.


Lastly is check networking equipment to make sure that equipment is not failing/overloading.

Regards,
Shannon