Port 18181OPSEC CVP

Port 18181 is assigned to the OPSEC CVP service over TCP and UDP.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

Technical Details

what runs on :18181

CVP normally uses TCP 18181 for a gateway-to-content-scanning-server exchange: the gateway submits content for inspection and receives a scan verdict or processed response. It is a binary request/response protocol associated with Check Point OPSEC content-security integrations; UDP is included in the registry assignment but is not the usual transport for CVP deployments. The service is generally found alongside other Check Point OPSEC integrations and should be reachable only between the configured gateway and inspection host.

Security Information

exposure of :18181

risk score

5/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

security averages 3.1 across 382 ports — this one sits 1.9 above.

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

This port should not normally be exposed to the public internet. An exposed CVP endpoint may accept attacker-controlled inspection data or reveal an internal content-security service; exploitability and authentication depend on the Check Point and CVP-server configuration. Restrict it to trusted gateway-to-scanner networks and use the deployment's supported secure transport or network isolation where available.

Record

iana registry entry

port: :18181
service: OPSEC CVP
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: Security
usage: This is the Check Point OPSEC Content Vectoring Protocol, used to integrate a Security Gateway with an external antivirus or content-security server. Engineers typically encounter TCP 18181 on an internal security appliance or CVP inspection server, not as a general-purpose internet service.
lookups: 0rank 993
added: 2026-09-15
updated: 2026-09-22
references: IANA service name registry — port 18181

Something wrong?

This record is maintained by the engineers who use port 18181. 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 2026-09-22.

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

Related Ports

all 382 in security →

the 8 most looked-up other ports in security — 382 ports carry that label.

port	service	proto	category	risk	views
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:443	HTTPS	TCPtls	Web Services	caution	65.9k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:8080	HTTP Alternate	TCP	Web Services	caution	44.9k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :18181OPSEC CVP

Technical Details

Security Information

Related Ports

Port 18181OPSEC CVP