Opened 9 years ago

Last modified 3 years ago

#3943 needs_information enhancement

self-test the socks port before bootstrapping is complete?

Reported by: arma Owned by:
Priority: Low Milestone: Tor: unspecified
Component: Core Tor/Tor Version:
Severity: Normal Keywords: tor-client
Cc: erinn Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


Some users (e.g. those in #3941) have local firewalls that will let them open a high numbered port, but not let any applications connect to it. When we set 'socksport auto' for them, they can end up in this situation.

One option would be for Tor to make a socks connection to itself on the socksport it just opened, and make a connection to .noconnect or the equivalent (which I believe we disabled for no good reason, but that's a separate issue). If that test fails, log a more useful error and prevent bootstrapping from reaching 100%.

(The socksport test can happen in parallel to the rest of bootstrapping, so in all reasonable cases it shouldn't be holding anything up.)

It's unclear to me how often this feature will be useful in practice -- for example, perhaps the firewalls that prevent apps from reaching these ports would still allow the app that bound the port to reach it.

But it seems like the sort of feature that will come in handy down the road when debugging weird firewall situations. And the weird firewalls sure aren't going to go away anytime soon.

Child Tickets

Change History (5)

comment:1 Changed 9 years ago by erinn

Cc: erinn added

comment:2 Changed 9 years ago by nickm

Milestone: Tor: 0.2.3.x-finalTor: unspecified

comment:3 Changed 8 years ago by nickm

Keywords: tor-client added

comment:4 Changed 8 years ago by nickm

Component: Tor ClientTor

comment:5 Changed 3 years ago by nickm

Severity: Normal
Status: newneeds_information

Have we actually run into the scenario described here? If not I say we close this one.

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