linux

[Ashok Kumar B S]

How to block a particular user from telnet service

[Ivan Ferreira]

Please see this very recent thread:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1169829

[sandeep mathur]

check out
iptables -A INPUT -s --dport 23 -j DROP.

at the iptables file
then for ftp same as above but --dport 21
ssh 22

[Steven E. Protter]

Shalom,

The iptables command can be adjusted to block a hostname or IP address.

If however you wish to block one user and let others in, you need to build code into /etc/profile to detect and eject that user.

SEP

[palaniappan.sp]

Hi,

U can deny the user from telnetting to ur m/c by putting the user name in /etc/host.deny and more over u can specify the user name in /etc/xinetd.d/telnetd
Only_from = < allowed user>

The second thing if u have configured proxy, u can able to control the telnet access based on the user acl.

let me know if u required any details

Regds
Palani