Port 3864Aggregate Server Access Protocol (ASAP) over SCTP/TLS

TLS-protected SCTP endpoint for ASAP, the RSerPool protocol used to manage server pools and endpoint handlespaces.

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

also known as asap-sctp-tls, ASAP, RSerPool ASAP

1 other service is registered on port 3864. compare all 2 →

Technical Details

what runs on :3864

This is the SCTP/TLS variant of ASAP (Aggregate Server Access Protocol), used in the RSerPool architecture. A client establishes an SCTP association to port 3864 and protects ASAP protocol messages with TLS; this is TLS over SCTP, not a TCP-based TLS service. ASAP messages support server-pool and endpoint management. The related non-TLS ASAP service is registered on SCTP port 3863.

Security Information

exposure of :3864

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 2.7 across 1,462 ports — this one sits 0.7 below.

in transit

encrypted

payloads are protected on the wire

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

TLS protects the association, and can authenticate peers when certificates and verification are configured; encryption alone does not ensure that only trusted pool elements can connect. Treat this as an infrastructure control-plane service: restrict it to authorized RSerPool peers and avoid exposing it to the public internet. It is uncommon in internet scans, and no specific widely exploited vulnerability is known for this port.

Record

iana registry entry

port: :3864
service: Aggregate Server Access Protocol (ASAP) over SCTP/TLS
transport: SCTP
encryption: tls / encrypted
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: ASAP is part of Reliable Server Pooling (RSerPool), where it supports management of server pools and their endpoints. Engineers are most likely to encounter this on infrastructure linking cooperating pool elements, rather than on a general-purpose public server.
lookups: 0rank 993
added: 2026-10-02
updated: 2026-10-02
references: IANA service name registry — port 3864
RFC 5352

Something wrong?

This record is maintained by the engineers who use port 3864. 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 2026-10-02.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :3864Aggregate Server Access Protocol (ASAP) over SCTP/TLS

Technical Details

Security Information

Related Ports

Port 3864Aggregate Server Access Protocol (ASAP) over SCTP/TLS