Port 1029Solid Mux Server

Port assigned to Solid Mux Server, a TCP/UDP service registered to Anders Borg.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

1 other service is registered on port 1029. compare all 2 →

Technical Details

what runs on :1029

On older Windows systems, port 1029 can be allocated dynamically to a DCE/RPC service, with the specific service and interface varying by host and boot state; scanners have historically associated this port with LSASS-related RPC. Clients normally discover dynamic RPC endpoints through the RPC Endpoint Mapper on TCP/UDP 135 and then connect to the assigned high port using binary DCE/RPC framing. The port itself provides no fixed application protocol or guaranteed handshake, and modern Windows versions generally use higher dynamic ranges instead. IANA separately assigns TCP and UDP 1029 to Solid Mux Server, but that assignment does not explain most contemporary sightings.

Security Information

exposure of :1029

risk score

7/ 10risk

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

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 · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

An Internet-exposed Windows RPC endpoint can disclose service and host information and may provide access to vulnerable or weakly protected RPC interfaces. It should normally be filtered from untrusted networks along with the associated RPC endpoint-mapper traffic; exposure is especially concerning on legacy, unpatched Windows systems. The risk depends on which RPC service received the port, so identifying the endpoint and host version is important.

Record

iana registry entry

port: :1029
service: Solid Mux Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: uncategorised
usage: Port 1029 is commonly encountered as a legacy Windows dynamic RPC port, sometimes identified by scanners as MS-LSA, rather than as Solid Mux Server. The assigned Solid Mux Server service is registered to Anders Borg, but it is not the usual explanation for frequent Internet-wide observations of this port.
lookups: 0rank 993
added: 2026-08-19
updated: 2026-09-22
references: IANA service name registry — port 1029

Something wrong?

This record is maintained by the engineers who use port 1029. 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 2026-09-22.

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

Related Ports

browse categories →

ports registered around :1029, by lookups.

port	service	proto	category	risk	views
:981	Check Point Embedded HTTPS Management	TCPtls	Security	caution	28.5k
:992	Telnet over TLS/SSL	TCPUDPtls	Security	caution	23.5k
:989	FTPS Data	TCPUDPtls	Security	caution	22.5k
:990	FTPS Control	TCPUDPtls	Security	caution	21.8k
:995	POP3S	TCPtls	Email	caution	18.8k
:991	Netnews Administration System	TCPUDP	Network Services	caution	17.9k
:1080	SOCKS Proxy	TCPtls	Security	caution	16.1k
:1059	IBM AIX NIM	TCPUDP	Network Services	caution	15.6k

risk mix of the 8 listed

caution100%

6 of 8 encrypted

Port :1029Solid Mux Server

Technical Details

Security Information

Related Ports

Port 1029Solid Mux Server