HTTPfy

Port 125 (locus-map)

IANA assigns port 125 to locus-map: Locus PC-Interface Net Map Ser.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
locus-map TCP Locus PC-Interface Net Map Ser Eric Peterson -
locus-map UDP Locus PC-Interface Net Map Ser Eric Peterson -

Check what is listening on port 125

Linux: is anything listening on TCP 125?
sudo ss -tlnp 'sport = :125'
Linux: UDP 125
sudo ss -ulnp 'sport = :125'
Linux / macOS: which process owns the port
sudo lsof -nP -i :125
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':125 '
Windows (Command Prompt)
netstat -ano | findstr :125
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 125 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 125
From Windows
Test-NetConnection HOST -Port 125
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 125

Block port 125 in the firewall

ufw
sudo ufw deny 125/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 125 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 125 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 125' -Direction Inbound -Protocol TCP -LocalPort 125 -Action Block
ufw
sudo ufw deny 125/udp
iptables
sudo iptables -A INPUT -p udp --dport 125 -j DROP
nftables
sudo nft add rule inet filter input udp dport 125 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 125' -Direction Inbound -Protocol UDP -LocalPort 125 -Action Block

Related ports

123NTP124ansatrader126nxedit127locus-con

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