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[tor-bugs] #4696 [Tor Client]: add OutboundBindInterface option to torrc
#4696: add OutboundBindInterface option to torrc
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Reporter: mr-4 | Owner:
Type: enhancement | Status: new
Priority: normal | Milestone:
Component: Tor Client | Version: Tor: 0.2.2.34
Keywords: | Parent:
Points: | Actualpoints:
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First, I am well-aware that there is OutboundBindAddress option in tor.
I am also aware that tor "automatically" chooses an IP address/interface
to bind to (if OutboundBindAddress is not specified) based on the current
routing table.
There are quite a few instances where OutboundBindAddress option is not
suitable, particularly where the IP address changes frequently (vpn as
well as most dhcp-dependant interfaces).
Whether I use OutboundBindAddress or just leave tor to make a decision
which address to bind to is not suitable (at least) in the following two
cases:
1. When I temporarily loose my IP address which tor has used up until now
due to dhcp client renewing its lease (and receive a new IP address) and
that doesn't happen - for whatever reason - instantly.
This results in one of two possible - wrong - outcomes: a) in case of
absence of OutboundBindAddress option, Tor decides that my IP address "has
changed" and tries to bind to the default interface, which may not be the
one I have used previously; or b) when OutboundBindAddress is specified,
tor just sits there trying to use the "old" address specified, resulting
in a stall.
2. When I temporarily loose my current IP address due to vpn connection
becoming (temporarily) unstable and it takes a bit of time for my machine
to renew its IP address (this may take from a minute to up to 20+ minutes
depending on the status of the vpn server at the other end) the outcome is
exactly the same as I listed above - tor either tries to use the default
interface (wrong!) or tries to bind to the IP address I specified with
OutboundBindAddress (wrong again).
With the introduction of this new (OutboundBindInterface) option, tor can
follow the IP address on the specified *interface* (regardless of what
that might be) and the above - erroneous - outcome could be avoided.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4696>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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