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Port 5112 (pm-cmdsvr)

IANA assigns port 5112 to pm-cmdsvr: PeerMe Msg Cmd Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pm-cmdsvr TCP PeerMe Msg Cmd Service Marcos Della -
pm-cmdsvr UDP PeerMe Msg Cmd Service Marcos Della -

Registry dates for this port: registered 2005-08.

Check what is listening on port 5112

Linux: is anything listening on TCP 5112?
sudo ss -tlnp 'sport = :5112'
Linux: UDP 5112
sudo ss -ulnp 'sport = :5112'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5112
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5112 '
Windows (Command Prompt)
netstat -ano | findstr :5112
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5112 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5112
From Windows
Test-NetConnection HOST -Port 5112
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5112

Block port 5112 in the firewall

ufw
sudo ufw deny 5112/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5112 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5112 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5112' -Direction Inbound -Protocol TCP -LocalPort 5112 -Action Block
ufw
sudo ufw deny 5112/udp
iptables
sudo iptables -A INPUT -p udp --dport 5112 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5112 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5112' -Direction Inbound -Protocol UDP -LocalPort 5112 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.