[tor-bugs] #19740 [Core Tor/Tor]: (new ?) efficient attack against an exit relay

[Tor Bug Tracker & Wiki]

#19740: (new ?) efficient attack against an exit relay
--------------------------+---------------------------------
 Reporter:  toralf        |          Owner:
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:  Tor: 0.2.8.5-rc
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
--------------------------+---------------------------------

Comment (by toralf):

 B/c an iptables counter rule showed over 145 millions connections to port
 80 I added 2 rules to iptables :
 {{{
   #  Tor
   #
   # limit max. number per second
   $IPT -A INPUT -p tcp --destination-port 80 --syn --match connlimit
 --connlimit-above 1000 -j DROP
   # limit max. number per IP address
   $IPT -A INPUT -p tcp --destination-port 80 --syn --match connlimit
 --connlimit-above 5 --connlimit-mask 32 -j DROP
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19740#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online