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|−|Still to finish: port knocking section, ssh bruteforce protection with recent module, rewrite of NAT section, firewall script. I' m probably going to end up rewriting a lot of the other stuff too, to make the article/guide easier to follow. [[User: Thestinger| Thestinger]] 12: 50, 8 April 2010 ( EDT) |+|
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|−|== NAT == |+|
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|−|The NAT section here is incomplete and there is a far superior article here: [[ NAT'ing firewall - Share your broadband connection]] . If no one opposes it, I'm going to work on improving [[ NAT'ing firewall - Share your broadband connection]] and then get rid of the NAT section here once it has no unique information. This article is for a "Simple Stateful Firewall", not an NAT. [[User: Thestinger| Thestinger]] 13: 35, 9 April 2010 ( EDT) |+|
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Revision as of 11:46, 6 October 2013
IPv6 icmp replies
For ipv6 adaptation.
As --reject-with icmp6-proto-unreachable does not exist in ipv6, as told in the page, and according to the error messages description in the RFC [].
I think the icmp6-adm-prohibited which means "Communication with destination administratively prohibited" may be the message to send. It is only by reading the RFC, I am not a network expert and I have no idea of what is generally done in this case.--Cladmi 07:28, 15 February 2012 (EST)
- Other articles have suggested a vanilla reject, thus:
-A INPUT -p tcp -j REJECT --reject-with tcp-reset
-A INPUT -p udp -j REJECT --reject-with icmp6-port-unreachable
-A INPUT -j REJECT
--Steve-o (talk) 13:44, 13 September 2013 (UTC)
- I'd say it depends what you want to do and the link to the RFC above by Cladmi is perfectly correct. I would change your last rule to
-A INPUT -j REJECT --reject-with icmp6-adm-prohibited
- I would argue there is no big harm done complying with it anyway (more the contrary: the connecting system learns there is an IPv6 capable fw). Do you see reasons not to do it like that? --Indigo (talk) 12:15, 15 September 2013 (UTC)