topic Re: Telnet Problem in Operating System - HP-UX

Telnet Problem

Rajesh T.Panikker — Sun, 10 Feb 2008 09:50:30 GMT

I have Five servers one Unix Server (11.23) 192.168.2.50
and net mask 255.255.255.0. this all servers are in same network(same vlan). all clients are 192.168.12.0 and 192.168.14.0 seris . i can telnet to linux servers and work from my pc (192.168.12.50).but i am not able to telnet to my hp Unix box ,some times i can login this server but with in seconds it will disconnect from server.

Can Anybody help me to slove the issue

Thanks
rajesh

Re: Telnet Problem

VK2COT — Sun, 10 Feb 2008 10:21:52 GMT

Hello,

Several possible issues:

a) Check /var/adm/inetd.sec to
verify if telnet is managed by the ACLs;

b) Check /etc/inetd.conf and then
/etc/hosts.allow and /etc/hosts.deny to see
if telnet is managed by TCP Wrappers;

c) Check if Bastille is configured on
the server:

/opt/sec_mgmt/bastille/bin/bastille -l

d) Check hostname resolution
(DNS, /etc/hosts, and so on).

That should do for the moment;.

Cheers,

VK2COT

Re: Telnet Problem

Rajesh T.Panikker — Sun, 10 Feb 2008 12:02:24 GMT

Regarding this issue.

This is new box.Nothing is configured with this server.

Re: Telnet Problem

Ramesh S — Mon, 11 Feb 2008 08:30:08 GMT

Hi

Run this command on your server:

# netstat -a | grep -i telnet

Check the /etc/inetd.conf file for telenet entry.

Try restarting internet services by "inetd -c"

Check the syslog for related errors.

Thanks & Regards

Ramesh

Re: Telnet Problem

Rajesh T.Panikker — Mon, 11 Feb 2008 17:39:20 GMT

regarding the issue

only problem with HP Unix Server.I can ping/telnet any linux sever.

i have checked all configaration which you have mentioned earlier. but still i am not able to telnet/ping to this unix box.

Thanks and regards
rajesh

Re: Telnet Problem

VK2COT — Tue, 12 Feb 2008 02:19:24 GMT

Hello,

OK, if you confirmed that ACLs aare not
an issue, next steps are:

a) Are ICMP blocked at the firewall
or routers in your company? I work
for companies that block ICMP so ping(1)
and traceroute(1) are useless in that case.

b) Is your HP-UX server on the network?
Did you check it via tools like linkinfo
(a new WTEC tool that will replace number of older commands in HP-UX).

Otherwise, use:

ifconfig lanXX
linkloop ...
lanscan

b) Does your HP-UX server have a default
route or any route, or you use
gated protocol?

netstat -rnv

c) Is your HP-UX server on the same subnet as
the other servers (network, subnet mask,
broadcast address...)?

d) Is the network interface set correctly
(to match settings on the router or switch):

duplex mode
autonegotiation
speed

e) Can you reach the HP-UX server by
using ssh?

f) Is inetd running on the HP-UX server
and is telnet enabled in /etc/inetd.conf?

g) What do the log files on the HP-UX
server show? For example,
/var/adm/syslog/syslog.log...

Cheers,

VK2COT