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I set up a bridge at home on my Raspberry Pi (Raspbian Buster) using these instructions, and I believe everything is configured correctly... But there is no activity in or out of my bridge. Here's some messages I am seeing:

16:31:26 [NOTICE] Heartbeat: In the last 6 hours, I have seen 0 unique clients. [2 duplicates hidden]

16:31:26 [NOTICE] Heartbeat: Tor's uptime is 17:59 hours, with 0 circuits open. I've sent 6.18 MB and received 25.58 MB. [2 duplicates hidden]

16:04:28 [NOTICE] Performing bandwidth self-test...done.

13:10:43 [NOTICE] No circuits are opened. Relaxed timeout for circuit 408 (a Testing circuit 3-hop circuit in state doing handshakes with channel state open) to 60000ms. However, it appears the circuit has timed out

I know bridges don't see as much activity but is this abnormal? Also since I am behind a router, specifically what ports would have to be forwarded?

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    You can try to connect to your own bridge with the standard Tor browser to check if it is working. I possible, test this from another WAN connection so that you can be sure NAT is working as well (if that applies).
    – Martin
    Sep 30, 2019 at 7:14

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Here are the instructions for debian: https://community.torproject.org/relay/setup/bridge/debian-ubuntu/

About ports, it says:

Don't forget to change the ORPort, ServerTransportListenAddr, ContactInfo, and Nickname options.

If you decide to use a fixed obfs4 port smaller than 1024 (for example 80 or 443), you will need to give obfs4 CAP_NET_BIND_SERVICE capabilities to bind the port with a non-root user:

sudo setcap cap_net_bind_service=+ep /usr/bin/obfs4proxy

Pretty much, pick a port and make sure that it is open on your router.

From the Tor Relay Guide we see:

The IPv4 address is not required to be static but static IP addresses are preferred. Your IPv4 address should remain unchanged for at least 3 hours (if it regularly changes more often than that, it does not make much sense to run a relay or bridge there since it takes time to distribute the new list of relay IPs to clients - which happens only once every hour).

also, check here for your bridge. Do you see any errors or warnings?

Finally, there is a tor-relays mailing list with other people who are running relays, bridges, etc.

https://trac.torproject.org/projects/tor/wiki/TorRelayGuide

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