Port 3863Aggregate Server Access Protocol (ASAP)

Aggregate Server Access Protocol (ASAP) traffic for RSerPool service registration and session management.

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

also known as asap-tcp, ASAP, RSerPool ASAP

Technical Details

what runs on :3863

ASAP is an RSerPool control and session-management protocol used between pool users and pool elements. On TCP, the protocol runs after the normal TCP connection establishment and uses length-bearing protocol messages with structured parameters for operations such as endpoint registration, deregistration, and session handling. ASAP is also assigned over SCTP on the same port number; the protocol itself does not provide application-layer encryption by default.

Security Information

exposure of :3863

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 2.9 across 1,059 ports — this one sits 0.9 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

every listening transport is another surface to filter at the edge

security overview

This is an obscure infrastructure protocol and should not normally be exposed to the public Internet unless an RSerPool deployment requires it. An exposed listener can provide protocol attack surface and may disclose or alter server-pool state; use network filtering and compensating authentication or encryption where supported.

Record

iana registry entry

port: :3863
service: Aggregate Server Access Protocol (ASAP)
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: TCP port 3863 is assigned to the Aggregate Server Access Protocol, part of the Reliable Server Pooling (RSerPool) architecture. Engineers generally encounter it only in RSerPool implementations, rather than in common enterprise services; the related protocol is also used over SCTP.
lookups: 0rank 994
added: 2026-09-09
updated: 2026-09-09
references: IANA service name registry — port 3863

Something wrong?

This record is maintained by the engineers who use port 3863. 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 2026-09-09.

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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 :3863Aggregate Server Access Protocol (ASAP)

Technical Details

Security Information

Related Ports

Port 3863Aggregate Server Access Protocol (ASAP)