I have a connection of 100mb/s and its going too slow, just look here: https://globe.torproject.org/#/search/query=A11BAE8F2676FF78727EE74949836E495D801D90

The relay is located in a OVH VPS

How can I use the complete bandwidth?


3 Answers 3


Try this maillist: https://lists.torproject.org/pipermail/tor-talk/2012-August/025296.html

This is Edward Snowden.

Hi guys,

I've been running a kind-of 1gbps (voxility style 1gbps) exit server on Debian for a couple months, and while it started out very fast, it's gotten much slower over time. ....

He used 1gbps, it is 10x more than your speed. Anyway, his tuning shall help you.

*sysctl* (straight c&p [minus the nf_conntrack entries] from Moritz' 
excellent guide.  nf_conntrack is not currently used on my server):

net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.ipv4.tcp_rmem = 4096 87380 33554432
net.ipv4.tcp_wmem = 4096 65536 33554432
net.core.rmem_default = 524287
net.core.wmem_default = 524287
net.core.optmem_max = 524287
net.core.netdev_max_backlog = 300000
net.ipv4.tcp_mem = 33554432 33554432 33554432
net.ipv4.tcp_max_orphans = 30000
net.ipv4.tcp_max_syn_backlog = 300000
net.ipv4.tcp_fin_timeout = 4
vm.min_free_kbytes = 65536

net.ipv4.tcp_keepalive_time = 60
net.ipv4.tcp_keepalive_intvl = 10
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.ip_local_port_range = 1025 65530
net.core.somaxconn = 30720
net.ipv4.tcp_max_tw_buckets = 2000000
net.ipv4.tcp_timestamps = 0

Have you read the lifecycle of a new tor relay? In particular:

So that's phase one: your new relay gets basically no use for the first few days of its life because of the low 20KB cap, while it waits for a threshold of bwauths to measure it.


TorServers.net has an excellent wiki entry on setting up exit relays. I'll write some additional hints below:

  1. You should make sure that you have a "real" 100MB/s connection. Several providers tell you that your server uses such a connection, but share it among several servers. So you won't reach the full 100MB/s.
  2. In the case of OVH you should be aware that they accept Tor relays, but claim to eventually shut them down (probably when they notice abuse, see GoodBadISPs at Tor's wiki. Currently your relay is listed as a non-exit, so everything should be fine.
  3. According to the Globe page, your relay is only two days old. It takes some time until it reaches the full bandwidth.
  4. Setting the DirPort option and thus sharing directory data might help to attract more bandwidth.
  5. If you have a system with multiple cores, it is recommended to set up one Tor process per core. This uses more bandwidth and utilizes the CPUs better. See the TorServers wiki entry above.

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