CyberHunter
Local dataset, no network
// Other services

Port 8207: LM SServer

Port 8207 is assigned by IANA to lm-sserver (LM SServer).

8207

How lm-sserver works

Other services
client:8207lm-sserverresponse client:8207lm-sserverresponse

The client sends a request to port 8207 and the lm-sserver service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 8207 dangerous?

We have no specific security note for port 8207. Its risk depends on the program actually listening on it. General advice for other services services:

  • 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.
02 Registry

IANA registry entries for port 8207

ServicePortTransportDescriptionReferenceUpdated
lm-sserver 8207 TCP, UDP LM SServer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8207, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8207'      # process listening on 8207
sudo lsof -nP -i :8207

macOS

sudo lsof -nP -i :8207

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8207 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8207
netstat -ano | findstr :8207

From another machine

nmap -p 8207 -sV <host>
sudo nmap -sU -p 8207 <host>
nc -zv <host> 8207

Block it in the firewall

sudo ufw deny 8207/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8207" -Direction Inbound -LocalPort 8207 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8207 used for?

Port 8207 is assigned by IANA to lm-sserver (LM SServer).

Is port 8207 TCP or UDP?

Port 8207 is registered for TCP and UDP.

Is it safe to open port 8207?

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 8207 is open?

On Linux run "ss -ltnup 'sport = :8207'", on macOS "lsof -nP -i :8207", and on Windows "netstat -ano | findstr :8207" to see the local process. From another machine, "nmap -p 8207 <host>" shows whether it is reachable.

05 Related
: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

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