Allow access to SSH for certain IPs

Hi,

what is the best way to deny access to ssh for every body except certain IPs. Looking for a way that's the easiest to configure, like editing a single file

Can I use iptables and put all IPs in a file? or hosts.allow? How do I deny access for every body?
DennieAsked:
Who is Participating?
 
legolasthehansyCommented:
sshd: ALL EXCEPT 192.168.0.2, 192.168.0.3, 192.168.0.4 etc..

Or

sshd: ALL EXCEPT 192.168.0.1/255.255.255.0
to exclude the 192.168.0.1 network
0
 
legolasthehansyCommented:
On /etc/hosts.deny

sshd: ALL EXCEPT 192.168.0.2

The above denies all except 192.168.0.2. You don't need a restart as the settings are read once you save the file.
0
 
DennieAuthor Commented:
what if I want to add 5 more IPs?
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

 
1ly4meCommented:
For TCP wrappers,
/etc/hosts.deny
sshd : all except 192.168.0.0/24

This will only allow network 192.168.0.0 to access SSH

For IPtables.
#iptables -I INPUT -p tcp ! -s 192.168.0.0/24 --dport=22 -j REJECT
0
 
rickygmCommented:
Hi, I make by means of firewall or iptables

in shorewall like this

ACCEPT          net:XXX.XXX.XXX.XXX   $FW                   tcp     ssh

iptables other example

iptables -A INPUT -p tcp -s 192.168.0.0/24 --dport 22 -j ACCEPT

http://wiki.centos.org/HowTos/Network/IPTables

regardss
0
 
senseifedonCommented:
Hi;
iptables -I INPUT -p tcp --dport 22 -s 123.123.123.123 -j ACCEPT
iptables -I INPUT -p tcp --dport 22 -j DROP

Open in new window


123.123.123.123 should been your exception ip.

Good luck. Or you can use fail2ban. It's allow you to ban ip address after some (you can arrange value) unauthorized tries.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.