[tor-bugs] #24902 [Core Tor/Tor]: Denial of Service mitigation subsystem

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#24902: Denial of Service mitigation subsystem
-------------------------------------------------+-------------------------
 Reporter:  dgoulet                              |          Owner:  dgoulet
     Type:  enhancement                          |         Status:  closed
 Priority:  Very High                            |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:  fixed
 Keywords:  tor-dos, tor-relay, review-          |  Actual Points:
  group-30, 029-backport, 031-backport,          |
  032-backport, review-group-31, SponsorV        |
Parent ID:                                       |         Points:
 Reviewer:  arma                                 |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by cypherpunks):

 > This has no basis in reality, the DoS impact on regular normal users is
 0 (just read the default config).
 {{{
 /* DoSCircuitCreationMinConnections default */
 #define DOS_CC_MIN_CONCURRENT_CONN_DEFAULT 3
 /* DoSCircuitCreationRateTenths is 3 per seconds. */
 #define DOS_CC_CIRCUIT_RATE_DEFAULT 3
 /* DoSCircuitCreationBurst default. */
 #define DOS_CC_CIRCUIT_BURST_DEFAULT 90
 /* DoSCircuitCreationDefenseTimePeriod in seconds. */
 #define DOS_CC_DEFENSE_TIME_PERIOD_DEFAULT (60 * 60)
 }}}
 {{{
 DoSConnectionMaxConcurrentCount=50
 }}}
 {{{
 /* DoSConnectionDefenseType maps to the dos_conn_defense_type_t enum. */
 #define DOS_CONN_DEFENSE_TYPE_DEFAULT DOS_CONN_DEFENSE_CLOSE
 }}}

 https://metrics.torproject.org/relayflags.html
 or
 default_bridges.low_n

 https://en.wikipedia.org/wiki/Network_address_translation

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24902#comment:84>
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