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Port 1934 (xaapi)

IANA assigns port 1934 to xaapi: IBM LM Appl Agent.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
xaapi TCP IBM LM Appl Agent Helga Wolin -
xaapi UDP IBM LM Appl Agent Helga Wolin -

Check what is listening on port 1934

Linux: is anything listening on TCP 1934?
sudo ss -tlnp 'sport = :1934'
Linux: UDP 1934
sudo ss -ulnp 'sport = :1934'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1934
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1934 '
Windows (Command Prompt)
netstat -ano | findstr :1934
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1934 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1934
From Windows
Test-NetConnection HOST -Port 1934
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1934

Block port 1934 in the firewall

ufw
sudo ufw deny 1934/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1934 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1934 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1934' -Direction Inbound -Protocol TCP -LocalPort 1934 -Action Block
ufw
sudo ufw deny 1934/udp
iptables
sudo iptables -A INPUT -p udp --dport 1934 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1934 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1934' -Direction Inbound -Protocol UDP -LocalPort 1934 -Action Block

Related ports

1932ctt-broker1933xmapi1935RTMP1936jetcmeserver

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