Can we add option for SSH to only allow local connections

Cloudmin
2 
# Disable all auth by default
PasswordAuthentication no
PubkeyAuthentication no

[.. then, at the end of the file ..]

# Allow auth from local network
Match Address  192.168.1.*
    PubkeyAuthentication yes
    # if you want, you can even restrict to a specified user
    AllowUsers stephan

Did a little reading on Stack Exchange… Looks like there is an option supposedly called “Match Address” I am not so sure as to what the best route to take is obviously you can add it to your firewall as well like so.

iptables

sudo iptables -I INPUT -p tcp --dport 22 -s 192.168.0.0/16 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 22 -j REJECT

Please do not use DROP in iptables.

or

TCP wrapper

As outlined on the forums post, you can use TCP Wrapper . TCP wrapper uses 2 files, /etc/hosts.allow and /etc/hosts.deny

Edit /etc/hosts.allow and add your subnet

sshd : 192.168.0.

Edit /etc/hosts.deny , and deny all

ALL : ALL

SSH configuration

You can set several options in /etc/ssh/sshd_config. One is the listen address. If You set a listen address on your subnet. A private IP address is not routable over the internet.

ListenAddress 192.168.0.10

You can also use the AllowUsers

AllowUsers you@192.168.0.0/16

Somewhat related, you can also change the port

Port 1234

Alas I’d like to see it integrated into virtualmin and cloudmin never the less a simple box to tick that does the job.