Aseem Khurana wrote:
I'm writing these quickly so if you get runtime errors check the spelling.Our Linux Admin is out for a week, my running server has gown down, a standby server has rhl.9, apache, php, mysql etc. setup and I need to put my machine on external IP. But I need help with the firewall config. I tried going through the iptables entires, and the linux-mini-firewall-howto, but couldn't get it in my bones and feel that I may as well goof something up. So I'm looking for help.
The system has 2 NICs, one on local wire, and other would get the external IP. I need to make sure that the external client's-IP/IP-range should be the only one accessing a particular service of the server e.g. http/80, or ssh/22. And for the rest of the world... everything blocked. Along with this the local network's systems should be able to access everything as usual. What should I configure and how, please help.
p.s. - My co. might need one more guy in the coming month, and if someone of you is from Chandigarh, and interested for a Job I can forward your resume as a sys. admn. Thx.
thanks, Aseem.
Change ip with relevant ip address
create a sh script and put these lines into it. From there you can do whatever you want with them.
iptables -P INPUT DROP
iptables -A INPUT -s ip.ip.ip.ip/mask -p tcp --destination-port 80 -j ACCEPT #web
iptables -A INPUT -s ip.ip.ip.ip/mask -p tcp --destination-port 22 -j ACCEPT #ssh
iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
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