Port 684CORBA IIOP over SSL

Encrypted CORBA object-request traffic using IIOP over an SSL/TLS connection.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 4/10
lookups: 0

also known as corba-iiop-ssl, SSLIOP, CORBA SSL

Technical Details

what runs on :684

A CORBA client establishes an SSL/TLS session and then exchanges GIOP/IIOP requests and replies over the protected connection. IIOP normally uses TCP; although IANA lists both TCP and UDP for this assignment, SSL-protected IIOP deployments are generally TCP-based. TLS versions, certificate validation, and mutual authentication depend on the ORB configuration.

Security Information

exposure of :684

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

network services averages 3.9 across 623 ports — this one sits 0.1 above.

in transit

encrypted

payloads are protected on the wire

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

The TLS layer protects confidentiality and integrity only when certificates and authentication are configured correctly; it does not make exposed CORBA object interfaces safe by itself. Internet exposure can reveal or reach callable application objects, so this port should normally be restricted to trusted networks and tightly controlled clients.

Record

iana registry entry

port: :684
service: CORBA IIOP over SSL
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 4/10caution
category: Network Services
usage: Port 684 is the conventional endpoint for CORBA ORBs offering SSL-protected IIOP, also called SSLIOP. Engineers typically encounter it in legacy enterprise middleware and distributed-object systems; modern deployments are uncommon and usually internal.
lookups: 0rank 994
added: 2026-08-20
updated: 2026-08-20
references: IANA service name registry — port 684

Something wrong?

This record is maintained by the engineers who use port 684. 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 2026-08-20.

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

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :684CORBA IIOP over SSL

Technical Details

Security Information

Related Ports

Port 684CORBA IIOP over SSL