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- Filename: 150-exclude-exit-nodes.txt
- Title: Exclude Exit Nodes from a circuit
- Author: Mfr
- Created: 2008-06-15
- Status: Closed
- Implemented-In: 0.2.1.3-alpha
- Overview
- Right now, Tor users can manually exclude a node from all positions
- in their circuits created using the directive ExcludeNodes.
- This proposal makes this exclusion less restrictive, allowing users to
- exclude a node only from the exit part of a circuit.
- Motivation
- This feature would Help the integration into vidalia (tor exit
- branch) or other tools, of features to exclude a country for exit
- without reducing circuits possibilities, and privacy. This feature
- could help people from a country were many sites are blocked to
- exclude this country for browsing, giving them a more stable
- navigation. It could also add the possibility for the user to
- exclude a currently used exit node.
- Implementation
- ExcludeExitNodes is similar to ExcludeNodes except it's only
- the exit node which is excluded for circuit build.
- Tor doesn't warn if node from this list is not an exit node.
- Security implications:
- Open also possibilities for a future user bad exit reporting
- Risks:
- Use of this option can make users partitionable under certain attack
- assumptions. However, ExitNodes already creates this possibility,
- so there isn't much increased risk in ExcludeExitNodes.
- We should still encourage people who exclude an exit node because
- of bad behavior to report it instead of just adding it to their
- ExcludeExit list. It would be unfortunate if we didn't find out
- about broken exits because of this option. This issue can probably
- be addressed sufficiently with documentation.
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