Opened 21 months ago

Last modified 2 weeks ago

#23521 new enhancement

detect if clock skew is probably really time zone misconfiguration

Reported by: catalyst Owned by:
Priority: Medium Milestone: Tor: unspecified
Component: Core Tor/Tor Version:
Severity: Normal Keywords: bootstrap, clock-skew, ux, 034-triage-20180328, 034-removed-20180328, ex-sponsor-19, ex-sponsor19
Cc: brade, mcs, intrigeri Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


Many times when a tor client has clock skew, it's offset from the network by a round number of hours (or half hours), implying a time zone misconfiguration of some kind. We might want to detect these situations and either automatically compensate, or report a better warning to the user than we do currently.

Child Tickets

Change History (14)

comment:1 Changed 21 months ago by mcs

Cc: brade mcs added

comment:2 Changed 21 months ago by catalyst

At least a few instances of this have shown up on IRC where the user had their time zone set to UTC but the clock set to their local time. Multiple consistent clock skew indications that are a round number of hours or half hours combined with a time zone that appears to be UTC should be a strong hint that the time zone is misconfigured.

comment:3 Changed 20 months ago by nickm

Sponsor: Sponsor8

comment:4 Changed 17 months ago by nickm

Milestone: Tor: 0.3.3.x-finalTor: 0.3.4.x-final

Label a bunch of (arguable and definite) enhancements as enhancements for 0.3.4.

comment:5 Changed 16 months ago by catalyst

Keywords: s8-errors added

comment:6 Changed 15 months ago by nickm

Keywords: 034-triage-20180328 added

comment:7 Changed 15 months ago by nickm

Keywords: 034-removed-20180328 added

Per our triage process, these tickets are pending removal from 0.3.4.

comment:8 Changed 15 months ago by nickm

Milestone: Tor: 0.3.4.x-finalTor: unspecified

These tickets, tagged with 034-removed-*, are no longer in-scope for 0.3.4. We can reconsider any of them, if time permits.

comment:9 Changed 10 months ago by intrigeri

Cc: intrigeri added

comment:10 Changed 9 months ago by traumschule

Marked #27806 as a duplicate.

comment:11 Changed 5 months ago by gaba

Keywords: s8-errors removed
Sponsor: Sponsor8

comment:12 Changed 5 months ago by catalyst

Sponsor: Sponsor19-can

Many clock skew issues were already fixed recently by relaxing consensus lifetimes on the client. Remaining issues might be PT-related, so move to sponsor19.

comment:13 Changed 2 weeks ago by gaba

Keywords: ex-sponsor-19 added

Adding the keyword to mark everything that didn't fit into the time for sponsor 19.

comment:14 Changed 2 weeks ago by gaba

Keywords: ex-sponsor19 added
Sponsor: Sponsor19-can

Remove sponsor 19 and add a keyword ex-sponsor19 to mark all the tickets that could have been in the scope of the sponsor.

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