Port 1096Common Name Resolution Protocol

CNRP provides XML-based searches for resources identified by common names.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as cnrprotocol, CNRP

Technical Details

what runs on :1096

CNRP is an XML-based client/server request-response protocol for searching resources by human-readable common names. IANA registers it on both TCP and UDP port 1096; deployments commonly use a transport connection to exchange XML requests and responses, with no standard encrypted transport or broadly deployed alternate port. The protocol is unrelated to DNS despite its name.

Security Information

exposure of :1096

risk score

1/ 10safe

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

network services averages 3.2 across 838 ports — this one sits 2.2 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

tcp · udp

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

security overview

CNRP does not provide encryption by default, so queries and responses should not be exposed to untrusted networks when they contain sensitive registry data. Because deployments are rare, the main risks are unintended service exposure, information disclosure, and implementation-specific denial-of-service or parser flaws; internet-facing access should generally be restricted.

Record

iana registry entry

port: :1096
service: Common Name Resolution Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services
usage: This port is used by Common Name Resolution Protocol (CNRP) clients to query name or registry services and receive matching resource records. It is an obscure, rarely encountered protocol associated with registry and catalog applications rather than general-purpose DNS resolution.
lookups: 0rank 994
added: 2026-08-30
updated: 2026-08-30
references: IANA service name registry — port 1096

Something wrong?

This record is maintained by the engineers who use port 1096. 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 2026-08-30.

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 838 in network services →

the 8 most looked-up other ports in network services — 838 ports carry that label.

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:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :1096Common Name Resolution Protocol

Technical Details

Security Information

Related Ports

Port 1096Common Name Resolution Protocol