mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-30 23:53:32 +01:00
67 lines
2.8 KiB
Plaintext
67 lines
2.8 KiB
Plaintext
Filename: 118-multiple-orports.txt
|
|
Title: Advertising multiple ORPorts at once
|
|
Version: $Revision$
|
|
Last-Modified: $Date$
|
|
Author: Nick Mathewson
|
|
Created: 09-Jul-2007
|
|
Status: Needs-Research
|
|
|
|
Some notes follow. Please feel free to flesh them out, discard them,
|
|
add in better ideas, etc.
|
|
|
|
- Some way to configure which address:port combinations to listen
|
|
on, and/or which to advertise.
|
|
|
|
(The best way to support lots of ports is to have your firewall
|
|
route all connections from those ports to Tor: this doesn't need
|
|
anywhere near as many listening sockets. You only really want to
|
|
listen on tons and tons of ports if your firewalling doesn't
|
|
support this, or you don't have access to your local
|
|
iptables/ipf/whatever. But if you want to do this with the
|
|
firewall, you need the ability to advertise ports you aren't
|
|
actually listening on.)
|
|
|
|
(Cat would also like to see some discussion of the effect this
|
|
is likely to have in environments that need to ban or limit Tor.
|
|
"Speaking only for myself, in an environment where I need to keep
|
|
a lid on Tor usage, having to chase port settings around makes it
|
|
more likely that I'm going to move from limiting Tor to just plain
|
|
banning it.")
|
|
|
|
- Some way to advertise in one's router descriptor which
|
|
address:port combinations you're listening on. For backward
|
|
compatibility this should be a new line, not a change to the
|
|
format of an existing line.
|
|
|
|
- Possibly, some way to relay this information in network-status
|
|
documents.
|
|
|
|
- Some analysis of the impact on network-status and routerinfo
|
|
size. My guess is "not much", but if it turns out to be a bit, we
|
|
should look into making the notation concise.
|
|
|
|
- What does this imply for self-testing of servers and testing by
|
|
authorities of servers? What should the authorities do if one
|
|
addr:port works but one doesn't?
|
|
|
|
- Some way to pick which addr:port to use when you have a choice of
|
|
more than one addr:port.
|
|
|
|
- Some way to avoid having servers open lots and lots of connections
|
|
between them when they get extend cells to the same server on
|
|
different ports.
|
|
|
|
- Suggested rule:
|
|
- If we're told to extend to IP:Port:ID, and we have a connection
|
|
to some server with ID, and we have confirmed that the server
|
|
likes the address we originally used when connecting to it (via
|
|
means in proposal 105), then use the existing connection.
|
|
- If we're told to extend to IP:Port:ID, and we have a descriptor
|
|
for the ID, and we have a connection to some server with ID,
|
|
and the existing connection is to an address listed as valid
|
|
in the descriptor, then use the existing connection.
|
|
- Otherwise, use a new connection.
|
|
|
|
- How this all interacts with coderman's ipv6 stuff (proposal 117).
|
|
|