Port 2419Attachmate S2S

Attachmate S2S is an obscure service assignment for TCP and UDP port 2419.

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

Technical Details

what runs on :2419

Attachmate S2S is registered on port :2419 over tcp and udp to Chris Rominski. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :2419

this machine

# linux
sudo ss -tulpn 'sport = :2419'

# macos / bsd
sudo lsof -nP -i :2419

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :2419

another host

nmap -sV -p T:2419 <host>
sudo nmap -sU -sV -p U:2419 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :2419

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 :2419 yet

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

Record

iana registry entry

port: :2419
service: Attachmate S2S
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: Port 2419 is assigned to the Attachmate S2S service on both TCP and UDP. The IANA registration names Chris Rominski as the registrant, but provides no implementation or deployment details.
lookups: 0rank 993
added: 2026-09-22
updated: 2026-09-22
references: IANA service name registry — port 2419

Something wrong?

This record is maintained by the engineers who use port 2419. 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.

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 :2419, by lookups.

port	service	proto	category	risk	views
:2370	BMC Control-M Server	TCP	System	caution	17.4k
:2369	BMC Control-M Configuration Agent	TCP	System	caution	14.8k
:2381	HP Insight Manager Web	TCP	Web Services	caution	14.4k
:2483	Oracle Listener (Unsecure)	TCPUDP	Security	caution	14.1k
:2447	OpenView NNM ovwdb Daemon	TCPUDP	Network Services	caution	12.8k
:2404	IEC 60870-5-104	TCP	Network Services	caution	10.5k
:2427	Cisco MGCP	UDP	Network Services	caution	7.9k
:2401	CVS	TCP	File Transfer	caution	4.9k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2419Attachmate S2S

Technical Details

Security Information

Related Ports

Port 2419Attachmate S2S