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Ticket Summary Keywords Status Owner Type Priority
#24902 Denial of Service mitigation subsystem ddos, tor-relay, review-group-30, 029-backport, 031-backport, 032-backport needs_review dgoulet enhancement Very High
#4580 Some Tor clients go nuts requesting the consensus if there is no recent enough consensus tor-client, tor-dos zombies deprecation new defect High
#4581 Dir auths should defend themselves from too many begindir requests per address prop258, tor-dos, tor-dirauth needs_revision andrea defect High
#7572 Make relay crypto run on multiple CPU cores tor-relay, term-project-ideas, tor-dos multithreading performance cpu assigned yawning defect High
#13737 Move circuit building crypto to worker tor-client, tor-hs, multicore, performance, tor-dos, term-project-ideas intro assigned yawning enhancement High
#15421 Relay crash when reloading and resolv.conf is empty tor-relay resolv.conf dns dos-maybe new defect High
#15940 Make a standard transition plan for killing off a client version SponsorS, tor-dos-designs accepted nickm task High
#15941 Form a plan for killing off client versions which assume they'll live forever SponsorS, needs-proposal, tor-dos-designs accepted nickm task High
#18346 Separate the various roles that directory authorities play, from a configuration POV prop257, dirauth, tor-dos, security, needs-design accepted nickm enhancement High
#18636 Write sub-proposals for each part of prop257: Refactoring authorities. Implement as appropriate. dirauth, needs-proposal, tor-dos, tor-dos-designs, term-project research-program accepted nickm project High
#18637 Have OOM handler look at all memory consumption, not just some tor-dos oom memory-handler memory-monitoring accepted nickm enhancement High
#18641 Teach the OOM handler about uploaded descriptors on a dirauth. tor-dos, tor-dirauth, oom assigned nickm enhancement High
#19984 Use a better set of comparison/evaluation functions for deciding which connections to kill when OOS dos, sockets accepted nickm defect High
#24769 Increase client idle and connection timeouts to reduce network load must-fix-before-033-stable, tor-client, dos-resistance, 032-backport, 031-backport, 029-backport, 025-backport-maybe new defect High
#2664 DoS and failure resistence improvements SponsorZ-large, tor-dirauth, tor-dos new enhancement Medium
#2668 Rate limit RELAY_EARLY and TLS by IP tor-relay, tor-dos new defect Medium
#2681 brainstorm ways to let Tor clients use yesterday's consensus more safely prop212, tor-client, small-feature, tor-dos-dirauth, low-bandwidth, sponsor4, sponsor8-maybe new enhancement Medium
#3029 We should save received documents before parsing them lorax, tor-dirauth, dos, debugging, diagnostic accepted rl1987 enhancement Medium
#3847 Provide ability to round robin outgoing exit connections on multiple interfaces performance port-exhaustion tor-relay dos new enhancement Medium
#6777 add config option to not rate limit authority dir conns tor-dirauth dos rate-limit easy new defect Medium
#6790 Write proposal draft for directory mirrors to accept, aggregate and hand off descriptors to dirauths needs-proposal, tor-dos-dirauth, tor-dirauth new enhancement Medium
#9390 Warn if you're being a public relay but have too-low file descriptor limit tor-relay easy dos resources logging needs_revision enhancement Medium
#15463 Tor deals poorly with a very large number of incoming connection requests. tor-hs, performance, dos new yawning defect Medium
#15516 Consider dropping INTRODUCE2 cells when under load SponsorU-deferred, tor-dos, tor-hs new enhancement Medium
#17640 Handle CREATE/CREATED cell processing gracefully under load. tor-hs, scaling, tor-dos, tor-relay assigned yawning enhancement Medium
#17806 Make onion queues rational, combine with workqueue logic. intro, term-project-ideas, tor-dos, cpuworker multithreading multicore needs-cs new enhancement Medium
#18320 Clear old entries from the key-pinning journal file tor-dos needs_revision enhancement Medium
#18635 Make a design for circuit- migration in the event of DoS tor-dos, tor-dos-designs, research-program research-project new project Medium
#18638 Write a proposal for PK handshake that uses more client resources than server. tor-dos, tor-dos-designs, research-program assigned yawning task Medium
#18642 Teach the OOM handler about the DNS cache tor-dos oom tor-relay dns new enhancement Medium
#18643 Replace the most error-prone binary parsers with trunnel tor-dos security tor-relay tor-client technical-debt parsing trunnel new enhancement Medium
#18644 Replace our routerparse.c core with something machine-generated tor-dos security tor-relay tor-client technical-debt parsing assigned andrea task Medium
#18645 Replace our http parser with something machine-generated tor-dos security tor-relay tor-client technical-debt parsing new task Medium
#18646 Generalize our OOM-handler to an OODisk handler tor-dos sponsor8-maybe diskspace new enhancement Medium
#18852 Directory mirrors should check accounting usage more frequently tor-relay directory mirror accounting usage dos bandwidth new defect Medium
#19304 Write a proposal for having dirauths push to fallbacks, rather than pull. prop256, tor-dirauth, needs-proposal, tor-dos, tor-dos-designs, term-project new task Medium
#19305 Write a proposal for separating "upload descriptors here" from the rest of what dirauths do. prop256, dirauth, needs-proposal, tor-dos, tor-dos-designs tor-dirauth term-project new task Medium
#19306 Write a proposal for removing liveness-testing from dirauths. prop256, dirauth, needs-proposal, tor-dos, tor-dos-designs tor-dirauth torflow research-program new task Medium
#19328 Try not to log from inside functions called from inside log functions recursion logging tor-relay dos technical-debt refactor stack-overflow blob callgraph new defect Medium
#19377 Consider retry/backoff behavior when building new circuits tor-dos refactor circuit-build object-model new task Medium
#24298 Better handling of DoS attacks on onion services tor-hs, prop224, tor-dos new defect Medium
#24299 Allow onion services to distinguish clients from each other tor-hs, prop224, tor-dos new defect Medium
#24770 Change the circuit build time defaults to reduce network load dos-resistance, tor-client new defect Medium
#24782 Set a lower default MaxMemInQueues value tor-relay, tor-ddos needs_information ahf defect Medium
#24797 Add an option that makes Tor use fewer connections tor-relay, DDoS-resistance new defect Medium
#24815 Validate shared random state dates before each voting period tor-sr, tor-ddos assigned dgoulet defect Medium
#24849 Added -1 signatures to consensus tor-sr, tor-ddos new defect Medium
#24899 [feature request] Increase the limit on pending client circuits with the number of onion services tor-hs, ddos-risk new enhancement Medium
#24962 Tor2web denial of service issues tor2web, tor-hs, tor-dos new enhancement Medium
#24963 dos: Add an option to block tor2web requests at the intro point tor-dos, tor2web, tor-hs new enhancement Medium
#24964 dos: Add an option to block tor2web requests at the HSDir tor-dos, tor2web, tor-hs new defect Medium
#24973 Tor should be more gentle when launching dozens of circuits at once tor-dos tor-hs performance new defect Medium
#469 please limit connections by client tor-relay dos needs_revision defect Low
#925 Tor fails badly when accept(2) returns EMFILE or ENFILE tor-relay, dos, oos, sponsor8-maybe new defect Low
#15251 Make tor support starting with 10.000 Tor Hidden Service tor-hs, scalability, tor-dos new task Low
#18647 When low on BW, limit the total fraction used to answer directory requests tor-dos tor-relay bandwidth priority new enhancement Low
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