HTTPfy

Port 1397 (audio-activmail)

IANA assigns port 1397 to audio-activmail: Audio Active Mail.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
audio-activmail TCP Audio Active Mail - -
audio-activmail UDP Audio Active Mail - -

Check what is listening on port 1397

Linux: is anything listening on TCP 1397?
sudo ss -tlnp 'sport = :1397'
Linux: UDP 1397
sudo ss -ulnp 'sport = :1397'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1397
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1397 '
Windows (Command Prompt)
netstat -ano | findstr :1397
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1397 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1397
From Windows
Test-NetConnection HOST -Port 1397
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1397

Block port 1397 in the firewall

ufw
sudo ufw deny 1397/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1397 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1397 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1397' -Direction Inbound -Protocol TCP -LocalPort 1397 -Action Block
ufw
sudo ufw deny 1397/udp
iptables
sudo iptables -A INPUT -p udp --dport 1397 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1397 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1397' -Direction Inbound -Protocol UDP -LocalPort 1397 -Action Block

Related ports

1395iclpv-wsm1396dvl-activemail1398video-activmail1399cadkey-licman

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