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GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.

  • The Tor Project
    • A
      Anti-censorship
  • Pluggable Transports
  • Snowflake
  • Issues
  • #19026

Closed
Open
Opened May 11, 2016 by David Fifield@dcfOwner

Remove local LAN address ICE candidates

ICE candidates can contain local LAN addresses as well as external addresses. For example, here's a redacted transcript from the Snowflake JS proxy:

a=candidate:4077567720 1 udp 2122260223 192.168.1.5 51282 typ host generation 0
a=candidate:8564102000 1 udp 1686052607 X.X.X.X 51282 typ srflx raddr 192.168.1.5 rport 51282 generation 0
a=candidate:3179889176 1 tcp 1518280447 192.168.1.5 52256 typ host tcptype passive generation 0

If it's possible, we should filter them out to prevent revealing more information than necessary. Serene and I guessed that they are only there for the case when both peers are in the same local network, but we're not sure about that.

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Reference: tpo/anti-censorship/pluggable-transports/snowflake#19026