[tor-talk] Isolating Proxy and iptables.

elrippo elrippo at elrippoisland.net
Sun May 18 05:52:31 UTC 2014


Maybe you find this helpful....

https://elrippoisland.net/public/how_to/anonymity.html

Kind regards,
elrippo

Am Samstag, 17. Mai 2014, 18:05:38 schrieb Clare ♬:
> Thanks! It's incredibly helpful to see how more experienced users have Tor
> set up. Sorry again for the poor formatting in my post, no idea what's up
> with that. 
 
> From: r.a at posteo.net
> To: tor-talk at lists.torproject.org
> Date: Sat, 17 May 2014 17:55:36 +0200
> Subject: Re: [tor-talk] Isolating Proxy and iptables.
> 
> On Saturday 17 May 2014 16:59:23 Clare ♬ wrote:
> 
> > I'm setting up a Tor-based isolating proxy using the 'Anonymizing
> > Middlebox' iptables rules specified here:
> > https://trac.torproject.org/projects/tor/wiki/doc/TransparentProxy i.e.
> > iptables -t nat -A PREROUTING -i $INT_IF -p udp --dport 53 -j REDIRECT
> > --to-ports 53iptables -t nat -A PREROUTING -i $INT_IF -p tcp --syn -j
> > REDIRECT --to-ports 9040 ...and the INPUT, OUTPUT and FORWARD chains are
> > left at the default. Would there be any merit to also including the
> > following rules? iptables -P INPUT DROPiptables -P FORWARD DROPiptables
> > -P
> > OUTPUT DROP iptables -A INPUT -i lo -j ACCEPTiptables -A INPUT -m state
> > --state ESTABLISHED,RELATED -j ACCEPT iptables -A OUTPUT -o lo -j
> > ACCEPTiptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> > Or
> > are they rendered unnecessary by my current setup?
> > Are there any other firewall rules that I should consider in order to
> > improve security and ensure that all traffic is torified? Many thanks.
> 
>  
>  
> https://bitbucket.org/ra_/tor-> gateway/src/367fedb41377570b6b414940a8788bd692931cd4/overlay/etc/iptables.co
> nf?at=master
 
> might help you.
>  
> It has been suggest recently, to additionally block rules:
> iptables -A OUTPUT -m conntrack --ctstate INVALID -j DROP
> iptables -A OUTPUT -m state --state INVALID -j DROP
>  
> HTH,
> Robert
> 

-- 
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