Port 8686Sun App Server JMX/RMI

JMX/RMI management traffic for Sun Application Server deployments.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 8/10
lookups: 0

also known as sun-as-jmxrmi, Sun Application Server JMX/RMI

Technical Details

what runs on :8686

The service normally runs over TCP using Java RMI/JRMP and exposes a JMX connector, commonly addressable with a URL such as service:jmx:rmi:///jndi/rmi://host:8686/jmxrmi. The connection uses an RMI registry or connector endpoint followed by Java serialization and JMX operations; depending on the application-server version and configuration, RMI may advertise or open an additional callback/server port. UDP is part of the registry assignment but is not normally used by the JMX/RMI protocol. Port 8686 is associated with JMX, while the same server commonly uses ports such as 4848 for its administration interface and 8080/8181 for HTTP/HTTPS application traffic.

Security Information

exposure of :8686

risk score

8/ 10risk

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

system averages 2.7 across 915 ports — this one sits 5.3 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

This port should not be exposed to the public Internet. An exposed JMX/RMI connector can disclose server management data and, depending on authentication, authorization, Java version, and application-server configuration, allow administrative operations or dangerous MBean actions; older Java RMI/JMX deployments have also been affected by deserialization and remote-code-execution issues. Restrict it to trusted management networks, require the server's authentication and authorization controls, enable SSL where supported, and account for any additional RMI ports in firewall rules.

Record

iana registry entry

port: :8686
service: Sun App Server JMX/RMI
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 8/10risk
category: System
usage: This is the default JMX management and monitoring connector for Sun Java System Application Server, and later GlassFish deployments. Administrators and monitoring tools use it to access Java Management Extensions (JMX) MBeans through Java RMI.
lookups: 0rank 993
added: 2026-09-10
updated: 2026-09-22
references: IANA service name registry — port 8686

Something wrong?

This record is maintained by the engineers who use port 8686. 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 915 in system →

the 8 most looked-up other ports in system — 915 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:4664	Google Desktop Search	TCP	System	caution	67.2k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:9080	WebSphere HTTP Transport (default)	TCP	Web Services	caution	51.6k
:23	Telnet	TCP	Remote Access	caution	34.8k
:12489	NSClient Monitoring Agent	TCP	Network Services	caution	30.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :8686Sun App Server JMX/RMI

Technical Details

Security Information

Related Ports

Port 8686Sun App Server JMX/RMI