Port 6704ForCES High-Priority Channel

SCTP channel for high-priority ForCES control messages between a control element and a forwarding element.

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

also known as frc-hp, ForCES HP

Technical Details

what runs on :6704

SCTP port 6704 carries the ForCES High-Priority (HP) channel between ForCES control and forwarding elements. After the SCTP association is established, ForCES messages use the protocol's message framing to convey control-plane operations; this is not a general-purpose application protocol. The registry assigns separate ForCES channels for other priorities on nearby ports, including 6705 and 6706.

Security Information

exposure of :6704

risk score

2/ 10safe

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

network services averages 2.6 across 1,745 ports — this one sits 0.6 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

sctp

every listening transport is another surface to filter at the edge

security overview

ForCES can carry operations that affect forwarding behavior, so an exposed listener could present a sensitive control-plane target. SCTP does not encrypt or authenticate application data by itself; restrict the channel to trusted CE–FE networks and use suitable network protections, such as IPsec where deployed. It is obscure and rarely encountered in internet scans, but should not be exposed publicly when in use.

Record

iana registry entry

port: :6704
service: ForCES High-Priority Channel
transport: SCTP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: ForCES (Forwarding and Control Element Separation) uses this channel for high-priority protocol traffic between a control element (CE) and forwarding element (FE). Engineers are most likely to encounter it inside specialized network equipment or a ForCES deployment, not on ordinary internet-facing hosts.
lookups: 0rank 993
added: 2026-10-11
updated: 2026-10-11
references: IANA service name registry — port 6704
RFC 5811

Something wrong?

This record is maintained by the engineers who use port 6704. 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 2026-10-11.

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edit this record →back to the registry

Related Ports

all 1,745 in network services →

the 8 most looked-up other ports in network services — 1,745 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 :6704ForCES High-Priority Channel

Technical Details

Security Information

Related Ports

Port 6704ForCES High-Priority Channel