Re: [tor-talk] Tor and iptables.

[Mirimir <mirimir@xxxxxxxxxx>]

On 12/11/2016 11:44 PM, Jonathan Marquardt wrote:
> On Sun, Dec 11, 2016 at 11:33:23PM -0700, Mirimir wrote:
>> On 12/10/2016 07:16 AM, Jason Long wrote:
>>> Hello.
>>> I like to close all INPUT connections via iptables but I like to use TorBrowser, Then Which port(s) must be open?
>>>
>>> -A OUTPUT -p tcp -m tcp --dport 9151 -j ACCEPT
>>>
>>>
>>> Is it enough? How about "INPUT"? Must I open any input port too?
>>>
>>> Thank you.
>>
>> You only need to allow input and output for the tor process. And input
>> for SSH, if you need that. Plus related/established, of course.
>>
>> In Debian, run "id -u debian-tor". Then use that number (typically 108)
>> in an output rule. Tor input is allowed by related/established.
>>
>> -A INPUT -i lo -j ACCEPT
>> -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
>> -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
>> -A INPUT -j DROP
>>
>> -A OUTPUT -i lo -j ACCEPT
>> -A OUTPUT -m owner --uid-owner 108 -j ACCEPT
>> -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
>> -A OUTPUT -j DROP
>>
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> 
> OP is running Tor Browser, not the typical Debian Tor setup. So "id -u 
> debian-tor" won't work. I assume that he's running Tor Browser as his normal 
> user.

Oops. Sorry. I'm used to straight Tor and Whonix. So how does one lock
down Tor using Tor browser?

> Also: "-A OUTPUT -i lo -j ACCEPT" is neither a valid rule, nor is it 
> necessary, since loopback traffic is already allowed at input and stateful 
> inspection is enabled both ways.

Not valid? It works for me. And by default, I drop all input, output and
forward.
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