Port 3304OP Session Server

Port 3304 is assigned to the OP Session Server service registered to Amir Blich.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as opsession-srvr

Technical Details

what runs on :3304

no technical write-up for :3304 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :3304

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

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

no security notes recorded for :3304 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :3304
service: OP Session Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 3304 to OP Session Server. The assignment is registered to Amir Blich, but no further product or deployment details are recorded.
lookups: 0rank 994
added: 2026-08-24
updated: 2026-08-24
references: IANA service name registry — port 3304

Something wrong?

This record is maintained by the engineers who use port 3304. 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 2026-08-24.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :3304, by lookups.

port	service	proto	category	risk	views
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:3269	Microsoft Global Catalog SSL	TCPUDPtls	Security	caution	26.4k
:3283	Apple Remote Desktop Reporting	TCP	Remote Access	caution	26.0k
:3299	SAP Router	TCPtls	Network Services	caution	13.8k
:3306	MySQL	TCPUDP	Databases	caution	13.6k
:3260	iSCSI Target Service	TCP	Databases	caution	11.1k
:3333	Network Caller ID	TCP	Network Services	caution	10.1k
:3300	Debate Gopher DB	TCPUDP	Databases	caution	7.6k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :3304OP Session Server

Technical Details

Security Information

Related Ports

Port 3304OP Session Server