Port 1527Oracle

IANA lists TCP and UDP port 1527 for an Oracle service identified as tlisrv.

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

also known as tlisrv

Technical Details

what runs on :1527

Apache Derby Network Server listens primarily over TCP on port 1527 and accepts JDBC/DRDA database connections. Clients establish a DRDA session and exchange framed database requests and responses; the service is not an HTTP or raw Oracle SQL*Net listener. Derby commonly binds to localhost in development deployments, though it can be configured to accept remote connections. TLS is configurable rather than enabled by default. UDP is not normally used by Derby, despite the IANA registration covering both TCP and UDP.

Security Information

exposure of :1527

risk score

7/ 10risk

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

databases averages 3.8 across 138 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 Derby listener can provide direct access to application data and may allow database operations if authentication and authorization are weak or misconfigured. Traffic is normally cleartext unless Derby SSL/TLS is explicitly configured, so credentials and query data can be intercepted. Keep it bound to localhost or an internal network, restrict access with a firewall, require authentication, and patch the Java/Derby installation. Some systems may instead be running an Oracle listener on this port because of the IANA assignment, but Oracle Database exposure is generally associated with port 1521.

Record

iana registry entry

port: :1527
service: Oracle
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Databases
usage: Port 1527 is the default network listener for Apache Derby, also distributed as Java DB. Engineers commonly encounter it on development systems, embedded application stacks, and test environments; Oracle is the IANA-registered name, but Oracle Database normally uses port 1521 instead.
lookups: 0rank 993
added: 2026-08-23
updated: 2026-09-22
references: IANA service name registry — port 1527

Something wrong?

This record is maintained by the engineers who use port 1527. 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 138 in databases →

the 8 most looked-up other ports in databases — 138 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 :1527Oracle

Technical Details

Security Information

Related Ports

Port 1527Oracle