Hello.
I recently enabled UFW on my relays. I have allowed in all necessary ports that my relay uses. I was looking at the logs and there are plenty of blocked incoming TCP connections. These connections are being blocked because they are attempting connection on ports that I have not opened e.g. 9001.
However, the traffic appears to be relay traffic. Is ufw interfering with my relay? Are there additional steps to take when running a relay alongside a firewall?
Here is a redacted snippet from my ufw log:
Oct 26 15:10:29 [UFW BLOCK] IN=eth0 OUT= MAC=04:01:26:15:5a:01:xx:8a:xx:64:xx:f0:xx:xx SRC=202.108.xxx.xx DST=178.62.xxx.xxx LEN=60 TOS=0x00 PREC=0x00 TTL=48 ID=46331 DF PROTO=TCP SPT=49892 DPT=34449 WINDOW=5840 RES=0x00 SYN URGP=0
Oct 26 15:10:32 [UFW BLOCK] IN=eth0 OUT= MAC=04:01:26:15:5a:01:28:8a:1c:64:cb:xx:xx:xx SRC=202.108.xxx.xx DST=178.62.xxx.xxx LEN=60 TOS=0x00 PREC=0x00 TTL=48 ID=46332 DF PROTO=TCP SPT=49892 DPT=34449 WINDOW=5840 RES=0x00 SYN URGP=0
Oct 26 15:15:12 [UFW BLOCK] IN=eth0 OUT= MAC=04:01:26:15:5a:01:28:8a:1c:64:cf:xx:xx:xx SRC=60.186.xx1.xx DST=178.62.xxx.xxx LEN=60 TOS=0x00 PREC=0x00 TTL=49 ID=19751 DF PROTO=TCP SPT=52502 DPT=34449 WINDOW=5840 RES=0x00 SYN URGP=0