Port 10500HIP NAT Traversal

UDP service for carrying Host Identity Protocol traffic through network address translators.

transport: udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as Host Identity Protocol NAT Traversal

Technical Details

what runs on :10500

HIP NAT Traversal carries HIP control traffic over UDP so that HIP exchanges can cross NAT boundaries. The HIP base exchange uses the I1/R1/I2/R2 handshake, while NAT traversal negotiation enables UDP encapsulation and maintenance of the required NAT mapping; subsequent data may use HIP-associated ESP protection. This is distinct from native HIP traffic carried directly with IP protocol 139, and it is not a TCP service.

Security Information

exposure of :10500

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

security averages 3.2 across 317 ports — this one sits 1.2 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

The HIP exchange provides cryptographic peer authentication and can establish keys for protected data, but the UDP control traffic itself should not be treated as application-layer encryption. Internet exposure is normally limited to deployed HIP endpoints or traversal infrastructure; unsolicited packets can still consume processing or create NAT state, so filtering and rate limiting are appropriate.

Record

iana registry entry

port: :10500
service: HIP NAT Traversal
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Security Network Services
usage: HIP NAT Traversal is used by Host Identity Protocol implementations to establish and maintain HIP communication across NAT devices. Engineers generally encounter it on HIP endpoints or NAT-traversal infrastructure rather than as a general-purpose application service.
lookups: 0rank 994
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 10500
RFC 5770
RFC 9028

Something wrong?

This record is maintained by the engineers who use port 10500. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-15.

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risk mix of the 8 listed

caution100%

3 of 8 encrypted

Port :10500HIP NAT Traversal

Technical Details

Security Information

Related Ports

Port 10500HIP NAT Traversal