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Correct comment explaining why tor2web mode should disable entry guards

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This commit is contained in:
Robert Ransom 2012-09-18 16:38:01 -04:00
parent 9d3e497edb
commit d1c4cf2f5a
1 changed files with 7 additions and 9 deletions
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16
src/or/config.c
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@ -2523,15 +2523,13 @@ options_validate(or_options_t *old_options, or_options_t *options,
}
if (options->Tor2webMode && options->UseEntryGuards) {
/* Tor2WebMode is incompatible with EntryGuards in two ways:
*
* - Tor2WebMode uses its guard nodes as rend and intro points.
* This makes tor2web users fingerprintable by their continued
* selection of the same 3 nodes for these circuits (their guard
* nodes).
*
* - Tor2WebMode makes unexpected use of circuit path lengths
* in ways that prevent us from applying the PathBias defense.
/* tor2web mode clients do not (and should not) use entry guards
* in any meaningful way. Further, tor2web mode causes the hidden
* service client code to do things which break the path bias
* detector, and it's far easier to turn off entry guards (and
* thus the path bias detector with it) than to figure out how to
* make a piece of code which cannot possibly help tor2web mode
* users compatible with tor2web mode.
*/
log_notice(LD_CONFIG,
"Tor2WebMode is enabled; disabling UseEntryGuards.");