Internet-Security.com TCP port 179 details

TCP port 179 is used by the Border Gateway Protocol (BGP) for establishing and maintaining peering sessions.
It’s used on routers and network OSes such as Cisco IOS/IOS-XE/IOS-XR and NX-OS, Juniper Junos, Arista EOS, Nokia SR OS, Huawei VRP, MikroTik RouterOS, and Ubiquiti EdgeOS.
Open-source routing stacks using TCP 179 include FRRouting (FRR), BIRD, OpenBGPD, Quagga (legacy), GoBGP, and ExaBGP.
Cloud networking services use BGP over 179 for dynamic routing: AWS Direct Connect and Site-to-Site VPN, Azure VPN Gateway/ExpressRoute, and Google Cloud Router/Interconnect.
Enterprise firewalls and SD-WAN platforms use BGP on 179: Palo Alto Networks PAN-OS, Fortinet FortiOS, Check Point Gaia, Cisco Meraki MX (in concentrator mode with DC BGP), Cisco Viptela SD-WAN, VMware SD-WAN (VeloCloud), and Versa.
Internet route collectors and looking glasses (e.g., RIPE RIS and University of Oregon Route Views) peer via TCP 179 to gather global routing data.
Many ISPs and CDNs (e.g., Akamai, Cloudflare, Lumen) run BGP on 179 across their edge routers for interdomain routing and anycast.
BGP over 179 is also used in data center fabrics (e.g., EVPN/VXLAN deployments) on platforms like Arista EOS, Cisco NX-OS, and Juniper Junos.
Security note: Port 179 is a target for BGP hijacking/route leaks and TCP session attacks (RST injection/hijack) that can reroute traffic; operators mitigate with strict prefix filters, MD5/TCP-AO, TTL security, and RPKI validation.

TCP 179