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Port 1437 (tabula)

IANA assigns port 1437 to tabula: Tabula.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tabula TCP Tabula Marcelo Einhorn -
tabula UDP Tabula Marcelo Einhorn -

Check what is listening on port 1437

Linux: is anything listening on TCP 1437?
sudo ss -tlnp 'sport = :1437'
Linux: UDP 1437
sudo ss -ulnp 'sport = :1437'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1437
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1437 '
Windows (Command Prompt)
netstat -ano | findstr :1437
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1437 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1437
From Windows
Test-NetConnection HOST -Port 1437
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1437

Block port 1437 in the firewall

ufw
sudo ufw deny 1437/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1437 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1437 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1437' -Direction Inbound -Protocol TCP -LocalPort 1437 -Action Block
ufw
sudo ufw deny 1437/udp
iptables
sudo iptables -A INPUT -p udp --dport 1437 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1437 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1437' -Direction Inbound -Protocol UDP -LocalPort 1437 -Action Block

Related ports

1435ibm-cics1436saism1438eicon-server1439eicon-x25

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