Port 9390OpenVAS Manager (GMP)

TCP 9390 commonly exposes the OpenVAS/Greenbone manager’s XML-based management interface.

transport: tcp
in transit: encrypted
assignment: official
risk: 7/10
lookups: 0

also known as otp, GMP, Greenbone Management Protocol, gvmd

Technical Details

what runs on :9390

This is a TCP management endpoint, commonly the GMP listener of Greenbone/OpenVAS Manager (gvmd). GMP exchanges XML commands and responses; clients authenticate before using management operations. Normal TCP deployments use TLS, while some installations communicate with gvmd over a local Unix socket instead. IANA’s registered description is OpenVAS Transfer Protocol (OTP), but the service engineers are more likely to find on port 9390 today is GMP; related Greenbone ports commonly include 9391 for the scanner protocol and 9392 for the web interface.

Security Information

exposure of :9390

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

security averages 3.0 across 423 ports — this one sits 4.0 above.

in transit

encrypted

payloads are protected on the wire

assignment

official

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

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

This is a vulnerability-management control interface, not a public service. An exposed endpoint gives an attacker an opportunity to probe for software flaws or weak credentials; a compromised account can control scans and access sensitive scan data. Keep it off the public internet, restrict access to trusted management hosts or a VPN, and use TLS and strong credentials.

Record

iana registry entry

port: :9390
service: OpenVAS Manager (GMP)
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 7/10risk
category: Security Network Services
usage: Engineers most commonly encounter this as the Greenbone/OpenVAS Manager (gvmd) endpoint, used by management clients to configure scans and retrieve results. IANA registers the port as OpenVAS Transfer Protocol (OTP), but current deployments generally use it for the Greenbone Management Protocol (GMP).
lookups: 0rank 993
added: 2026-10-15
updated: 2026-10-15
references: IANA service name registry — port 9390

Something wrong?

This record is maintained by the engineers who use port 9390. 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 2026-10-15.

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Related Ports

all 423 in security →

the 8 most looked-up other ports in security — 423 ports carry that label.

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: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 :9390OpenVAS Manager (GMP)

Technical Details

Security Information

Related Ports

Port 9390OpenVAS Manager (GMP)