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Re: [tor-bugs] #1263 [Tor Relay]: ICMP and DNS problems under load
#1263: ICMP and DNS problems under load
------------------------------+---------------------------------------------
Reporter: grumpy3 | Type: defect
Status: new | Priority: minor
Milestone: Tor: unspecified | Component: Tor Relay
Version: 0.2.1.22 | Resolution: None
Keywords: | Parent:
------------------------------+---------------------------------------------
Changes (by nickm):
* milestone: => Tor: unspecified
Old description:
> OS: gentoo linux up to date
>
> File Edit Options Buffers Tools Help
> when Tor does not run, the OS and the network is running as
> expected. When Tor runs with 256kBps and 512kBps burst, after
> about 15minutes after the available bw to Tor is fully used, some
> network capabilities of the system are degraded:
>
> * ping -f 8.8.8.8 reports more than 70% of packet loss
> * traceroutes don't finish (stars for every nodes)
> * DNS requests (w/ dig) fail to query _any_ DNS server 9 times
> over 10
>
> All that is fully functional when Tor is not running.
>
> Moreover, with that setup, Tor reports the following lines in the
> logs:
>
> 00:39:26 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
> 00:39:26 [WARN] eventdns: All nameservers have failed
> 00:33:25 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
> 00:33:25 [WARN] eventdns: All nameservers have failed
> 00:32:59 [NOTICE] eventdns: Nameserver 8.8.4.4 is back up
> 00:32:59 [WARN] eventdns: All nameservers have failed
> 00:29:54 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
> 00:29:54 [WARN] eventdns: All nameservers have failed
> 00:26:43 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
> 00:26:42 [WARN] eventdns: All nameservers have failed
>
> load of the system is near 0, there is no memory problems.
>
> If I set the available bw to Tor to 2MBps, Tor uses only about
> 400kBps. I have no logs like above, and the dig command can reach
> the servers 9 times over 10. The traceroute command also perform
> nearly as well as without Tor.
>
> I can't assess right now if the ISP has kind of traffic
> filtering. Checks about that are ongoing.
>
> [Automatically added by flyspray2trac: Operating System: Other Linux]
New description:
OS: gentoo linux up to date
File Edit Options Buffers Tools Help
when Tor does not run, the OS and the network is running as
expected. When Tor runs with 256kBps and 512kBps burst, after
about 15minutes after the available bw to Tor is fully used, some
network capabilities of the system are degraded:
* ping -f 8.8.8.8 reports more than 70% of packet loss
* traceroutes don't finish (stars for every nodes)
* DNS requests (w/ dig) fail to query _any_ DNS server 9 times
over 10
All that is fully functional when Tor is not running.
Moreover, with that setup, Tor reports the following lines in the
logs:
00:39:26 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
00:39:26 [WARN] eventdns: All nameservers have failed
00:33:25 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
00:33:25 [WARN] eventdns: All nameservers have failed
00:32:59 [NOTICE] eventdns: Nameserver 8.8.4.4 is back up
00:32:59 [WARN] eventdns: All nameservers have failed
00:29:54 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
00:29:54 [WARN] eventdns: All nameservers have failed
00:26:43 [NOTICE] eventdns: Nameserver 8.8.8.8 is back up
00:26:42 [WARN] eventdns: All nameservers have failed
load of the system is near 0, there is no memory problems.
If I set the available bw to Tor to 2MBps, Tor uses only about
400kBps. I have no logs like above, and the dig command can reach
the servers 9 times over 10. The traceroute command also perform
nearly as well as without Tor.
I can't assess right now if the ISP has kind of traffic
filtering. Checks about that are ongoing.
[Automatically added by flyspray2trac: Operating System: Other Linux]
--
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1263#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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