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[tor-relays] Re: Circuit-building DoS wave: 20x peak, 8x sustained circuits on guard relays since Jun 25
- To: tor-relays@xxxxxxxxxxxxxxxxxxxx
- Subject: [tor-relays] Re: Circuit-building DoS wave: 20x peak, 8x sustained circuits on guard relays since Jun 25
- From: Toralf Förster via tor-relays <tor-relays@xxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 23 Jul 2026 12:59:51 +0200
- Cc: Toralf Förster <toralf.foerster@xxxxxx>
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- User-agent: Mozilla Thunderbird
On 23/07/2026 07:24, Tor at 1AEO via
tor-relays wrote:
Seeing
good success limiting memory growth by setting
DosCircuitCreationBurst 20 instead of network default of 60 to
handle the current idle circuit connection flow.
But best is to not let them in.
I do block here connection attempts from 130 ipv6 /64 and 1500 IPv4
systems which are accountable for the majority of pain related to
CPU, OOM and Tor DDoS/circuit protocol violations etc.
--
Toralf
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