Port 1348 (bbn-mmx)

IANA assigns port 1348 to bbn-mmx: multi media conferencing.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

bbn-mmx TCP multi media conferencing - -

bbn-mmx UDP multi media conferencing - -

Linux: is anything listening on TCP 1348?

sudo ss -tlnp 'sport = :1348'

Linux: UDP 1348

sudo ss -ulnp 'sport = :1348'

Linux / macOS: which process owns the port

sudo lsof -nP -i :1348

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':1348 '

Windows (Command Prompt)

netstat -ano | findstr :1348

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1348 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 1348

From Windows

Test-NetConnection HOST -Port 1348

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 1348

ufw

sudo ufw deny 1348/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 1348 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 1348 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 1348' -Direction Inbound -Protocol TCP -LocalPort 1348 -Action Block

ufw

sudo ufw deny 1348/udp

iptables

sudo iptables -A INPUT -p udp --dport 1348 -j DROP

nftables

sudo nft add rule inet filter input udp dport 1348 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 1348' -Direction Inbound -Protocol UDP -LocalPort 1348 -Action Block

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