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Port 2246 (pc-mta-addrmap)

IANA assigns port 2246 to pc-mta-addrmap: PacketCable MTA Addr Map.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pc-mta-addrmap TCP PacketCable MTA Addr Map Dave Maxwell -
pc-mta-addrmap UDP PacketCable MTA Addr Map Dave Maxwell -

Check what is listening on port 2246

Linux: is anything listening on TCP 2246?
sudo ss -tlnp 'sport = :2246'
Linux: UDP 2246
sudo ss -ulnp 'sport = :2246'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2246
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2246 '
Windows (Command Prompt)
netstat -ano | findstr :2246
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2246 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2246
From Windows
Test-NetConnection HOST -Port 2246
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2246

Block port 2246 in the firewall

ufw
sudo ufw deny 2246/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2246 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2246 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2246' -Direction Inbound -Protocol TCP -LocalPort 2246 -Action Block
ufw
sudo ufw deny 2246/udp
iptables
sudo iptables -A INPUT -p udp --dport 2246 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2246 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2246' -Direction Inbound -Protocol UDP -LocalPort 2246 -Action Block

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