Port 5319Roughtime

Roughtime provides signed time responses so clients can detect stale or tampered time information.

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

Technical Details

what runs on :5319

Roughtime is a request-response time protocol. A client sends a fresh nonce; the server returns a timestamp and uncertainty information signed under a key the client trusts, allowing the client to check authenticity and freshness rather than relying on an unauthenticated time reply. The protocol is not designed to hide the time exchange. UDP is a common transport for Roughtime; TCP is also listed for this service, but transport support and stream framing depend on the implementation. This port is the IANA assignment, not a guarantee that every Roughtime deployment uses it.

Security Information

exposure of :5319

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 3.0 across 388 ports — this one sits 1.0 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

tcp · udp

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

security overview

Roughtime responses are authenticated, not encrypted: observers can see the exchange, and a client that trusts the wrong server key can still accept misleading time. Fresh nonces help prevent replay, but exposed servers can still receive unwanted requests or denial-of-service traffic; expose only an implementation you intend to operate and restrict it where practical. A public listener is not, by itself, evidence of a compromise.

Record

iana registry entry

port: :5319
service: Roughtime
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Security Network Services
usage: This port is assigned to Roughtime, a protocol for obtaining verifiable time from a server. Engineers are more likely to encounter it where a Roughtime client and server have been configured to use this port; some existing deployments use other ports, including UDP 2002.
lookups: 0rank 993
added: 2026-10-07
updated: 2026-10-07
references: IANA service name registry — port 5319

Something wrong?

This record is maintained by the engineers who use port 5319. 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 2026-10-07.

01edit any field on a page of its own
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :5319Roughtime

Technical Details

Security Information

Related Ports

Port 5319Roughtime