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-   -   Weird Firewall Rules, RHE 6.0 (http://www.linuxquestions.org/questions/linux-security-4/weird-firewall-rules-rhe-6-0-a-859963/)

smc2 02-01-2011 07:08 AM

Weird Firewall Rules, RHE 6.0
 
As you can see bellow, at the end of my firewall setting recently some weird new rules added
As I search they are for IP forwarding, but what does it means?what this server may forward and on what ports?

Thanks in Advance.

Code:

-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -i tun+ -j ACCEPT
-A FORWARD -o tun+ -j ACCEPT

-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A OUTPUT -o tun+ -j ACCEPT

COMMIT


Tinkster 02-01-2011 04:57 PM

Quote:

As you can see bellow, at the end of my firewall setting recently some wired new rules added
As I search they are for IP forwarding, but what does it means?what this server may forward and on what ports?

Thanks in Advance.
"tun" is a commonly used for virtual network interfaces, you'd
see something like that maybe if you installed qemu or the likes?

Oh, and I think the word you're after is "weird", not "wired".

Cheers,
Tink

smc2 02-02-2011 04:12 AM

No, I don't use any virtual machines or devices. Could they be dangerous? Is it safe to remove them?
And thanks for attention and misspell correction ;)

Tinkster 02-02-2011 11:26 AM

I'd ask myself why they showed up; what did you change recently?

And with these words I'm moving this thread over to security.



Cheers,
Tink


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