Port 9878KX509 Kerberized Certificate Issuance Protocol

KX509 uses Kerberos to support certificate issuance over UDP port 9878.

transport: udp
in transit: encrypted
assignment: official
risk: 1/10
lookups: 0

also known as kca-service

Technical Details

what runs on :9878

no technical write-up for :9878 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :9878

risk score

1/ 10safe

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

security averages 3.3 across 292 ports — this one sits 2.3 below.

in transit

encrypted

payloads are protected on the wire

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

no security notes recorded for :9878 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :9878
service: KX509 Kerberized Certificate Issuance Protocol
transport: UDP
encryption: tls / encrypted
assignment: iana registered
risk: 1/10safe
category: Security Network Services
usage: UDP port 9878 is assigned to the KX509 Kerberized Certificate Issuance Protocol in use in 2012. The assignment is registered to the IESG and is rarely observed on the public Internet.
lookups: 0rank 994
added: 2026-09-09
updated: 2026-09-09
references: IANA service name registry — port 9878
RFC 6717

Something wrong?

This record is maintained by the engineers who use port 9878. 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 2026-09-09.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 292 in security →

the 8 most looked-up other ports in security — 292 ports carry that label.

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:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:8080	HTTP Alternate	TCPtls	Web Services	caution	44.9k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k

risk mix of the 8 listed

caution100%

3 of 8 encrypted

Port :9878KX509 Kerberized Certificate Issuance Protocol

Technical Details

Security Information

Related Ports

Port 9878KX509 Kerberized Certificate Issuance Protocol