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Port 8205 (lm-instmgr)

IANA assigns port 8205 to lm-instmgr: LM Instmgr.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lm-instmgr TCP LM Instmgr Chris Flynn -
lm-instmgr UDP LM Instmgr Chris Flynn -

Check what is listening on port 8205

Linux: is anything listening on TCP 8205?
sudo ss -tlnp 'sport = :8205'
Linux: UDP 8205
sudo ss -ulnp 'sport = :8205'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8205
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8205 '
Windows (Command Prompt)
netstat -ano | findstr :8205
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8205 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8205
From Windows
Test-NetConnection HOST -Port 8205
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8205

Block port 8205 in the firewall

ufw
sudo ufw deny 8205/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8205 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8205 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8205' -Direction Inbound -Protocol TCP -LocalPort 8205 -Action Block
ufw
sudo ufw deny 8205/udp
iptables
sudo iptables -A INPUT -p udp --dport 8205 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8205 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8205' -Direction Inbound -Protocol UDP -LocalPort 8205 -Action Block

Related ports

8202aesop8204lm-perfworks8206lm-dta8207lm-sserver

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.