Port 800MDBS daemon

MDBS daemon traffic uses TCP or UDP port 800.

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

Technical Details

what runs on :800

MDBS daemon is registered on port :800 over tcp and udp. 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 :800

this machine

# linux
sudo ss -tulpn 'sport = :800'

# macos / bsd
sudo lsof -nP -i :800

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :800

another host

nmap -sV -p T:800 <host>
sudo nmap -sU -sV -p U:800 <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 :800

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 :800 yet

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

Record

iana registry entry

port: :800
service: MDBS daemon
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 800 to the MDBS daemon service, replacing the former service name "mdbs_daemon." No registrant is recorded, and the service has not been observed open in Nmap's internet-wide scan data.
lookups: 0rank 993
added: 2026-09-16
updated: 2026-09-16
references: IANA service name registry — port 800

Something wrong?

This record is maintained by the engineers who use port 800. 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 2026-09-16.

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 :800, by lookups.

port	service	proto	category	risk	views
:749	Kerberos Admin	TCPUDP	Security	safe	23.6k
:843	Adobe Flash Socket Policy	TCP	Web Services	caution	12.9k
:847	DHCP Failover	TCP	Network Services	caution	9.6k
:753	Kerberos User Registration	UDP	Security	safe	8.5k
:750	Kerberos IV	UDP	Security	safe	8.0k
:751	Kerberos Master Authentication	TCPUDP	Security	safe	7.8k
:754	Kerberos Slave Propagation	TCP	Security	safe	7.6k
:860	iSCSI	TCP	Databases	caution	7.3k

risk mix of the 8 listed

safe63%
caution38%

0 of 8 encrypted

Port :800MDBS daemon

Technical Details

Security Information

Related Ports

Port 800MDBS daemon