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ProfiMK · #1 (**permalink**) 18th February 2010, 06:55 PM

1. Does any one have clue idea how can i see how many connections a ssh user is using in the moment?
2. Does any one have some script that is limiting the irc connections per user, or any knowledge how to control them ?

kumarat9pm · #2 (**permalink**) 18th February 2010, 07:39 PM

Q1)
who -r
or
watch "lsof -i | grep ssh"

Q2)
you can limit no of connections using maxlogins option in /etc/security/limits.conf

ProfiMK · #3 (**permalink**) 19th February 2010, 01:50 AM

Quote:

Originally Posted by kumarat9pm

Q1)
who -r
or
watch "lsof -i | grep ssh"

Q2)
you can limit no of connections using maxlogins option in /etc/security/limits.conf

Q1 the both of commands are not showing me any connections that are on, should i install something?
Q2 maxlogins will restrict how many connections are going out on irc, or just from how many ip's can login on shell @ same time, or both?

kumarat9pm · #4 (**permalink**) 19th February 2010, 09:06 AM

Code:

[root@test ~]# lsof -i | grep ssh
sshd       2548   root    3u  IPv6   5505       TCP *:ssh (LISTEN)
sshd      16070   root    3u  IPv6 281966       TCP test.example.co.in:ssh->abc.example.co.in:36533 (ESTABLISHED)

if your lsof -i | grep ssh if its not showing any thing means.. there is no ssh connections at all..

the limits file which i mention is to where the connections are established.. not from where..

Can i have following details for understanding..?
1)if i have a client and server(irc provider).. where you want to restrict users? is it on server side or client side?

ProfiMK · #5 (**permalink**) 19th February 2010, 10:47 AM

I want to limit the connections that shell user will use to irc server. For ex. eggdrops i restric by limiting the process number, but psybnc is taking only 1 process but from it, thay can make a lot of connections on irc. And that is what i want to limit the outgoing connections.

ProfiMK · #6 (**permalink**) 20th February 2010, 12:41 PM

Quote:

Originally Posted by kumarat9pm

Code:

[root@test ~]# lsof -i | grep ssh
sshd       2548   root    3u  IPv6   5505       TCP *:ssh (LISTEN)
sshd      16070   root    3u  IPv6 281966       TCP test.example.co.in:ssh->abc.example.co.in:36533 (ESTABLISHED)

if your lsof -i | grep ssh if its not showing any thing means.. there is no ssh connections at all..

the limits file which i mention is to where the connections are established.. not from where..

Can i have following details for understanding..?
1)if i have a client and server(irc provider).. where you want to restrict users? is it on server side or client side?

1) and yes i want to limit the client for how many connections to irc server can use

nixcraft · #7 (**permalink**) 20th February 2010, 01:47 PM

Try iptables which will restrict outgoing IRC connections.

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ProfiMK (19th February 2010)