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Old 02-03-2009, 05:24 AM   #1
carlozrox
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Registered: Feb 2009
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How to block ALL traffic except port 443


Hi!

How can block ALL traffic with iptables except the port 443.
How can enable all traffic again.

Thanks a lot!
 
Old 02-03-2009, 06:07 AM   #2
win32sux
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Registered: Jul 2003
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Distribution: Ubuntu
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Quote:
Originally Posted by carlozrox View Post
Hi!

How can block ALL traffic with iptables except the port 443.
How can enable all traffic again.

Thanks a lot!
Depends on what kind of traffic. Is this a client, a server, or a router?

Client example (block/unblock):
Code:
iptables -I OUTPUT -p TCP -o eth0 --dport ! 443 -j REJECT
iptables -D OUTPUT -p TCP -o eth0 --dport ! 443 -j REJECT
Server example (block/unblock):
Code:
iptables -I INPUT -p TCP -i eth0 --dport ! 443 -j DROP
iptables -D INPUT -p TCP -i eth0 --dport ! 443 -j DROP
Router example (block/unblock):
Code:
iptables -I FORWARD -p TCP -i eth0 -o eth1 --dport ! 443 -j REJECT
iptables -D FORWARD -p TCP -i eth0 -o eth1 --dport ! 443 -j REJECT

Last edited by win32sux; 02-03-2009 at 07:08 AM.
 
Old 03-11-2009, 05:15 AM   #3
carlozrox
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Registered: Feb 2009
Posts: 2

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Quote:
Originally Posted by win32sux View Post
Depends on what kind of traffic. Is this a client, a server, or a router?

Client example (block/unblock):
Code:
iptables -I OUTPUT -p TCP -o eth0 --dport ! 443 -j REJECT
iptables -D OUTPUT -p TCP -o eth0 --dport ! 443 -j REJECT
Server example (block/unblock):
Code:
iptables -I INPUT -p TCP -i eth0 --dport ! 443 -j DROP
iptables -D INPUT -p TCP -i eth0 --dport ! 443 -j DROP
Router example (block/unblock):
Code:
iptables -I FORWARD -p TCP -i eth0 -o eth1 --dport ! 443 -j REJECT
iptables -D FORWARD -p TCP -i eth0 -o eth1 --dport ! 443 -j REJECT
Great! Thanks!
 
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