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sebastia
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Location: Antwerp, BE

Outgoing unsolicited traffic to 5351/udp

Sat Jun 07, 2025 4:34 pm

Hi

Noticed this in firewall logs:
2025-06-07T14:57:31.237416+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:34829-><pub_gw>:5351, len 30
2025-06-07T14:57:31.487536+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:34829-><pub_gw>:5351, len 30
2025-06-07T15:17:52.268559+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:33311-><pub_gw>:5351, len 30
2025-06-07T15:17:52.518421+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:33311-><pub_gw>:5351, len 30
2025-06-07T15:22:57.528527+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:54521-><pub_gw>:5351, len 30
2025-06-07T15:22:57.778461+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:54521-><pub_gw>:5351, len 30
2025-06-07T15:28:02.778614+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:59103-><pub_gw>:5351, len 30
2025-06-07T15:28:03.038486+02:00 firewall.home firewall,info fw2ext: in:(unknown 0) out:e1_ext, connection-mark:FT connection-state:new proto UDP, <pub_ip>:59103-><pub_gw>:5351, len 30
Figured it's related to nat-pmp, but:
/ip nat-pmp
set enabled=no
what gives?
(running ros v7.19)
 
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sebastia
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Posts: 1857
Joined: Tue Oct 12, 2010 3:23 am
Location: Antwerp, BE

Re: Outgoing unsolicited traffic to 5351/udp

Sat Jun 07, 2025 5:14 pm

FYI: looks like related to zerotier node