Routing ports
6 routing ports: what each one does, its protocol, and whether it is secure by default.
SubnetKit lists 6 routing ports, using TCP, TCP/UDP, UDP. 6 of 6 are formally registered with IANA rather than just a widely followed convention.
None of the routing ports here are encrypted by default. Treat traffic on any of them as plain text unless you add TLS, SSH, or a VPN tunnel yourself.
Click any port below for its full page: what it does, its protocol, and whether it is safe to expose.
| Port | Service | Protocol | What it does |
|---|---|---|---|
| 179 | BGP | TCP | Border Gateway Protocol |
| 427 | SLP | TCP/UDP | Service Location Protocol |
| 500 | ISAKMP/IKE | UDP | Internet Key Exchange (IPsec) |
| 520 | RIP | UDP | Routing Information Protocol |
| 646 | LDP | TCP | Label Distribution Protocol |
| 4500 | IPsec NAT-T | UDP | IPsec NAT Traversal |
Frequently asked questions
Which ports are in the Routing category?
port 179 (BGP), port 427 (SLP), port 500 (ISAKMP/IKE), port 520 (RIP), port 646 (LDP) and port 4500 (IPsec NAT-T).
How many routing ports does SubnetKit list?
6, covering TCP, TCP/UDP, UDP. 6 of them are formally registered with IANA.
Are routing ports secure by default?
No. None of the routing ports here are encrypted by default; wrap them in TLS, SSH, or a VPN if you need to protect the traffic.
Which routing port has the lowest number?
Port 179 (BGP). Port 179 is BGP, the Border Gateway Protocol that exchanges routing information between the autonomous systems that make up the internet. It is the protocol that decides how traffic actually gets from one network to another.