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Re: [tor-relays] How to reduce tor CPU load on a single bridge?



David,

In my implementation of the loadbalanced OBFS4 configuration, it appears that BridgeDB still tests the ORPort for availability and without it marks the OBFS4 bridge as being down.

I gather that default bridges don't require a DistributionMethod as your loadbalanced Snowflake configuration is set to "none?"

BTW... I have the loadbalanced OBFS4 configuration up and running, and am able to manually confirm loadbalanced OBFS4 connections are successfull.

nginx => obfs4proxy => tor

I believe it's time to enable a DistributionMethod.

Thank you for the clarifications.

Respectfully,


Gary

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On Thursday, December 8, 2022, 10:03:09 PM PST, David Fifield <david@xxxxxxxxxxxxxxx> wrote:


On Fri, Dec 09, 2022 at 01:09:05AM +0000, Gary C. New wrote:
> Is it truly necessary to expose the ORPort to the World in a pluggable
> transport configuration?

I don't know if it is necessary for ordinary bridges to expose the
ORPort. For a long time, it was necessary, because BridgeDB used the
ORPort to check that a bridge was running, before distributing it to
users. See:
https://bugs.torproject.org/tpo/core/tor/7349
But now there is rdsys and bridgestrap, which may have the ability to
test the obfs4 port rather than the ORPort. I cannot say whether that
removes the requirement to expose the ORPort.
https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/merge_requests/36

For the special case of the default bridges shipped with Tor Browser, it
is not necessary to export the ORPort, because those bridges are not
distributed by rdsys.
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