Network port detail · TCP/UDP

3205

iSNS
Protocol(s)
TCP/UDP
Range
Registered (1024-49151)
Reference
RFC 4171

Summary

// if you see it open
iSNS supports storage-device registration, queries, discovery-domain membership, and state change notifications. The supplied evidence does not establish specific vulnerabilities or the security posture of an implementation.
// common applications
Internet Storage Name Service (iSNS) Storage-network clients may register attributes, query the iSNS database, and receive state change notifications from an iSNS server.
[ 01 ] — Context

About port 3205.

Updated  ·  Confidence: High  ·  2 sources  ·  How this page is checked

Port 3205/tcp is registered by IANA as the iSNS Server Port. RFC 4171 describes iSNS as a protocol for iSNS clients and servers to support discovery, management, and configuration of iSCSI and Fibre Channel devices on TCP/IP networks. The evidence does not establish whether any particular host runs it or whether it should be reachable from the public internet, so exposure is Unknown.

RFC 4171 explains that iSNS clients can register storage-device attributes, query for information about other registered clients, and receive state change notifications. Its Discovery Domain service can limit which storage nodes learn about one another. Use of iSNS is optional for iSCSI and required for iFCP, according to the RFC; neither statement establishes how often the service is deployed.

Service
IANA registers 3205/tcp as the iSNS Server Port. [Confirmed]
Exposure
Unknown; the supplied evidence describes the protocol and registration, not intended public access or a particular host's reachability. [Unknown]
IANA service name
isns [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
IANA description
iSNS Server Port [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv

Protocol purpose

iSNS supports discovery, management, and configuration of iSCSI and Fibre Channel devices over TCP/IP

[Confirmed] — https://www.rfc-editor.org/rfc/rfc4171.txt
iSCSI usage
Optional [Confirmed] — https://www.rfc-editor.org/rfc/rfc4171.txt
iFCP usage
Required [Confirmed] — https://www.rfc-editor.org/rfc/rfc4171.txt
// registry data

Service assignments.

2 entries
// IANA / nmap services registry
NameProtocolDescriptionOpen frequency
isns TCP iSNS Server Port 0.00%
isns UDP iSNS Server Port 0.00%
IANA name
isns
Transport
TCP
Range
Registered (1024-49151)
Reference
RFC 4171

Service assignments from the IANA Service Name and Transport Protocol Port Number Registry, with open-frequency data from nmap-services.