Port 7626Simple Middlebox Configuration (SIMCO)

SIMCO is an RFC-defined protocol for clients to configure middleboxes such as firewalls and NAT devices.

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

also known as simco, SImple Middlebox COnfiguration

Technical Details

what runs on :7626

RFC 4540 defines SIMCO as a protocol for a client to request configuration changes from a middlebox, including firewall and NAT behavior. The IANA assignment covers TCP and SCTP on port 7626; a SIMCO connection carries structured client requests and server responses. It is a control-plane service, not a general-purpose data or web service, and should be expected only where SIMCO-capable management software is deployed.

Security Information

exposure of :7626

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 415 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 · sctp

every listening transport is another surface to filter at the edge

security overview

A reachable SIMCO listener may allow changes to firewall or NAT configuration, so access should be limited to trusted management systems rather than exposed to the public internet. Do not assume traffic is encrypted merely because it uses this port; protect the connection with appropriate network controls and a secured deployment.

Record

iana registry entry

port: :7626
service: Simple Middlebox Configuration (SIMCO)
transport: TCPSCTP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Security Network Services
usage: This port is assigned to SIMCO, an IETF-defined client-server protocol for configuring middleboxes. It is uncommon in general-purpose networks, and no registrant is recorded; if present, it is likely part of a managed network-control deployment.
lookups: 0rank 993
added: 2026-10-12
updated: 2026-10-12
references: IANA service name registry — port 7626
RFC 4540

Something wrong?

This record is maintained by the engineers who use port 7626. 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 2026-10-12.

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edit this record →back to the registry

Related Ports

all 415 in security →

the 8 most looked-up other ports in security — 415 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 :7626Simple Middlebox Configuration (SIMCO)

Technical Details

Security Information

Related Ports

Port 7626Simple Middlebox Configuration (SIMCO)