Port 1630Oracle Net8 Connection Manager

Oracle Net8 Connection Manager traffic assigned to TCP and UDP port 1630.

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

also known as oraclenet8cman, Oracle Connection Manager

Technical Details

what runs on :1630

This is the Oracle Net/Net8 Connection Manager service, commonly configured on TCP port 1630. It accepts Oracle Net TNS connections, processes the client connect descriptor, and forwards the session to an allowed database listener or other Oracle Net service; it is not itself the database listener. IANA lists the assignment for both TCP and UDP, although standard CMAN deployments are primarily encountered over TCP. Oracle Net framing is used rather than a line-oriented or HTTP handshake, and encryption is not inherent to the basic listener unless Oracle Native Network Encryption, TLS, or an external tunnel is configured.

Security Information

exposure of :1630

risk score

7/ 10risk

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

databases averages 3.8 across 146 ports — this one sits 3.2 above.

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 CMAN instance can reveal Oracle service details and provide a route to backend database listeners, depending on its routing and access-control configuration. It should normally be restricted to trusted application or database networks; exposure can enable connection probing, unauthorized relay attempts, and attacks against reachable Oracle services, while the basic protocol is not encrypted by default.

Record

iana registry entry

port: :1630
service: Oracle Net8 Connection Manager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Databases Network Services
usage: Oracle Connection Manager (CMAN) accepts Oracle Net client connections and proxies or concentrates them toward Oracle database listeners. Engineers typically encounter it in Oracle network architectures using port 1630 as an intermediate service, with databases commonly listening separately on port 1521.
lookups: 0rank 993
added: 2026-09-18
updated: 2026-09-22
references: IANA service name registry — port 1630

Something wrong?

This record is maintained by the engineers who use port 1630. 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.

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edit this record →back to the registry

Related Ports

all 146 in databases →

the 8 most looked-up other ports in databases — 146 ports carry that label.

port	service	proto	category	risk	views
:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:9001	ETL Service Manager	TCPUDP	Databases	caution	28.6k
:2484	Oracle SSL Listener	TCPUDPtls	Security	caution	25.0k
:5495	Applix TM1 Admin	TCP	Databases	caution	24.8k
:591	FileMaker Web Sharing	TCP	Web Services	caution	23.1k
:1521	Oracle TNS Listener	TCP	Security	caution	19.6k
:21001	AMLFilter Admin	TCP	Security	caution	19.2k
:18206	Audition FAM DB	TCPUDP	Databases	caution	19.1k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :1630Oracle Net8 Connection Manager

Technical Details

Security Information

Related Ports

Port 1630Oracle Net8 Connection Manager