[tor-relays] iptables changes required to advertise on 80 and 443 and bind to different ports.

Sun Oct 13 06:03:02 UTC 2013

Hy fellowoperator :D

First of all your iptables rule-set is useless because your default policy is 
to ACCEPT everything. I can not believe that you read books about it at then 
post something like this.

Secondly do not copy&paste from the i-net if you really do not know what you 
are doing!

So if i got that right, you want to advertise different ports than default?
This should be changed in the /etc/tor/torrc
Look for lines that sound like this

1.)
## Required: what port to advertise for incoming Tor connections.
#ORPort 9001
## If you want to listen on a port other than the one advertised in
## ORPort (e.g. to advertise 443 but bind to 9090), you can do it as
## follows.  You'll need to do ipchains or other port forwarding
## yourself to make this work.
#ORPort 443 NoListen
#ORPort 127.0.0.1:9090 NoAdvertise

and change it to ORPort 80

2.)
## Uncomment this to mirror directory information for others. Please do
## if you have enough bandwidth.
#DirPort 9030 # what port to advertise for directory connections
## If you want to listen on a port other than the one advertised in
## DirPort (e.g. to advertise 80 but bind to 9091), you can do it as
## follows.  below too. You'll need to do ipchains or other port
## forwarding yourself to make this work.
#DirPort 80 NoListen
#DirPort 127.0.0.1:9091 NoAdvertise
## Uncomment to return an arbitrary blob of html on your DirPort. Now you
## can explain what Tor is if anybody wonders why your IP address is
## contacting them. See contrib/tor-exit-notice.html in Tor's source
## distribution for a sample.
#DirPortFrontPage /etc/tor/tor-exit-notice.html

and change it to DirPort 443

3.)
Post the script you are using to set the iptables rules, than we can modify 
this accordingly to your needs.

Kind regards,
elrippo.

Am Sonntag, 13. Oktober 2013, 00:42:05 schrieb Tor Operator:
> I’m running a Tor exit relay on ports 9030 for advertising directory
> connections and 9001 for advertising incoming Tor connections. In the
> spirit of proxy-proofing my relay, I’d like to expose the directory and Tor
> connections on 80 and 443. I’ve spent hours trying to get my iptables
> config correct, but never successfully.
> 
> I’m running CentOS 6 with SELinux enabled. Swap and /tmp are encrypted. SSH
> is set to public key auth only and limited to a single user. Root login is
> disabled, as is X11 forwarding. No other services are active and log
> retainment is set to a short interval. It’s a dedicated box in data center
> with a 100Mbit, unmetered networking connection. The box’s sole purpose in
> life is to be an exit node.
> 
> My current iptables looks like this:
> 
> # Generated by iptables-save v1.4.7 on Sat Oct 12 13:52:47 2013
> *filter
> 
> :INPUT ACCEPT [0:0]
> :FORWARD ACCEPT [0:0]
> :OUTPUT ACCEPT [0:0]
> 
> -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
> -A INPUT -p icmp -j ACCEPT
> -A INPUT -i lo -j ACCEPT
> -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
> -A INPUT -p tcp -m tcp --dport 9001 -j ACCEPT
> -A INPUT -p tcp -m tcp --dport 9030 -j ACCEPT
> -A INPUT -j REJECT --reject-with icmp-host-prohibited
> -A FORWARD -j REJECT --reject-with icmp-host-prohibited
> -A OUTPUT -j ACCEPT
> COMMIT
> 
> I tried adding the following rules without success:
> 
> iptables -t nat -A PREROUTING -p tcp -i eth0 —dport 80 -j REDIRECT —to-ports
> 10091 iptables -t nat -A PREROUTING -p tcp -i eth0 —dport 443 -j REDIRECT
> —to-ports 10090
> 
> There was also a binding issue due to Tor being blocked from binding to
> 10091 and 10090, which I fixed with semanage port. But the logs still
> indicated that the ORPort and DirPort were not reachable from the outside.
> 
> I think I’m missing some other key iptable routing directives, but I can’t
> figure them out. I want 80 and 443 publicly exposed, but 10091 and 10090 to
> not be accessible from the internet.
> 
> I’ve read countless FAQs, how-tos, message board posts, Linux books, the Tor
> mailing lists, and the answer still eludes me. It’s maddening. If anyone
> can provide any assistance, I’d be greatly appreciative.
> 
> If I’m running the directory connections on port 80, should I still setup a
> vhost on the relay with the exit notice or can I just point to it in the
> torrc file?
> 
> .cpj
> _______________________________________________
> tor-relays mailing list
> tor-relays at lists.torproject.org
> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
-- 
We don't bubble you, we don't spoof you ;)
Keep your data encrypted!
Log you soon,
your Admin
elrippo at elrippoisland.net

Encrypted messages are welcome.
0x84DF1F7E6AE03644

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