If you don't ports 443 and 80 open on your relay for at least one IPv4 /8 block, it won't get the exit flag, so it won't be used nearly as much for exiting compared with other relays with the exit flag.
https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt#n2564
On 6/01/19 11:42 PM, Toralf Förster wrote:
If just 1 port would be opened at an relay, eg. 6697, would this help the Tor network or would only spammers and DDoS use that port?
tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays