- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 800:
Port 800 is assigned by IANA to mdbs_daemon (), mdbs-daemon (IANA assigned this well-formed service name as a replacement for "mdbs_daemon".).
800
How mdbs_daemon works
Other servicesThe client sends a request to port 800 and the mdbs_daemon service answers.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned2 registered services
- Range
- Well-known (0-1023)
- Category
- Other services
Is port 800 dangerous?
We have no specific security note for port 800. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 800
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| mdbs_daemon | 800 | TCP, UDP | - | - | |
| mdbs-daemon | 800 | TCP, UDP | IANA assigned this well-formed service name as a replacement for "mdbs_daemon". | - | - |
// source: IANA service name and port number registry
Which program uses port 800, and is it reachable?
Linux
sudo ss -ltnup 'sport = :800' # process listening on 800
sudo lsof -nP -i :800macOS
sudo lsof -nP -i :800
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 800 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 800 netstat -ano | findstr :800
From another machine
nmap -p 800 -sV <host> sudo nmap -sU -p 800 <host> nc -zv <host> 800
Block it in the firewall
sudo ufw deny 800/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 800" -Direction Inbound -LocalPort 800 -Protocol TCP -Action Block # Windows
What is port 800 used for?
Port 800 is assigned by IANA to mdbs_daemon (), mdbs-daemon (IANA assigned this well-formed service name as a replacement for "mdbs_daemon".).
Is port 800 TCP or UDP?
Port 800 is registered for TCP and UDP.
Is it safe to open port 800?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.
How do I check if port 800 is open?
On Linux run "ss -ltnup 'sport = :800'", on macOS "lsof -nP -i :800", and on Windows "netstat -ano | findstr :800" to see the local process. From another machine, "nmap -p 800 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp