Port 3136Grub Server

TCP and UDP port 3136 is assigned to the Grub Server service; public protocol details and common deployments are not established.

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

also known as grubd

Technical Details

what runs on :3136

Grub Server is registered on port :3136 over tcp and udp to Kord Campbell. 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 :3136

this machine

# linux
sudo ss -tulpn 'sport = :3136'

# macos / bsd
sudo lsof -nP -i :3136

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3136

another host

nmap -sV -p T:3136 <host>
sudo nmap -sU -sV -p U:3136 <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 :3136

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 :3136 yet

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

Record

iana registry entry

port: :3136
service: Grub Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA lists this as the Grub Server port and names Kord Campbell as the registrant. There is no established public information here about what software uses it in practice.
lookups: 0rank 993
added: 2026-09-27
updated: 2026-09-27
references: IANA service name registry — port 3136

Something wrong?

This record is maintained by the engineers who use port 3136. 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 2026-09-27.

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 :3136, by lookups.

port	service	proto	category	risk	views
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:3100	Tatsoft HTTP Port	TCP	Web Services	caution	19.4k
:3074	Xbox Live / Games for Windows	TCPUDP	Gaming	caution	10.9k
:3101	BlackBerry BES Cloud Comm	TCP	Cloud	caution	7.1k
:3094	Jiiva RapidMQ Registry	TCPUDP	Network Services	safe	0
:3162	SFLM	TCPUDP	—	safe	0
:3170	SERVERVIEW-ASN	TCPUDP	—	safe	0

risk mix of the 8 listed

safe38%
caution63%

0 of 8 encrypted

Port :3136Grub Server

Technical Details

Security Information

Related Ports

Port 3136Grub Server