Port 29167ObTools Message Protocol

TCP/UDP port 29167 is designated for ObTools Message Protocol (OTMP), associated with Paul Clark.

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

also known as otmp

Technical Details

what runs on :29167

ObTools Message Protocol is registered on port :29167 over tcp and udp to Paul Clark, assigned February 2006. 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 :29167

this machine

# linux
sudo ss -tulpn 'sport = :29167'

# macos / bsd
sudo lsof -nP -i :29167

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :29167

another host

nmap -sV -p T:29167 <host>
sudo nmap -sU -sV -p U:29167 <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 :29167

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 :29167 yet

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

Record

iana registry entry

port: :29167
service: ObTools Message Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA entry identifies this port as ObTools Message Protocol (OTMP), registered to Paul Clark in 2006. No widely established deployment or protocol behavior is known from the available information.
lookups: 0rank 993
added: 2026-10-19
updated: 2026-10-19
references: IANA service name registry — port 29167

Something wrong?

This record is maintained by the engineers who use port 29167. 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 2026-10-19.

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 :29167, by lookups.

port	service	proto	category	risk
:29118	SGs Application Part (SGsAP)	SCTP	Network Services	safe
:29168	SBc-AP (3GPP Cell Broadcast)	SCTP	Network Services	safe
:29169	HNBAP/RUA Common Association	SCTP	Network Services	caution

risk mix of the 3 listed

safe67%
caution33%

0 of 3 encrypted

Port :29167ObTools Message Protocol

Technical Details

Security Information

Related Ports

Port 29167ObTools Message Protocol