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Port 1772 (essweb-gw)

IANA assigns port 1772 to essweb-gw: EssWeb Gateway.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
essweb-gw TCP EssWeb Gateway Bob Nattenberg -
essweb-gw UDP EssWeb Gateway Bob Nattenberg -

Check what is listening on port 1772

Linux: is anything listening on TCP 1772?
sudo ss -tlnp 'sport = :1772'
Linux: UDP 1772
sudo ss -ulnp 'sport = :1772'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1772
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1772 '
Windows (Command Prompt)
netstat -ano | findstr :1772
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1772 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1772
From Windows
Test-NetConnection HOST -Port 1772
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1772

Block port 1772 in the firewall

ufw
sudo ufw deny 1772/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1772 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1772 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1772' -Direction Inbound -Protocol TCP -LocalPort 1772 -Action Block
ufw
sudo ufw deny 1772/udp
iptables
sudo iptables -A INPUT -p udp --dport 1772 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1772 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1772' -Direction Inbound -Protocol UDP -LocalPort 1772 -Action Block

Related ports

1770bmc-net-svc1771vaultbase1773kmscontrol1774global-dtserv

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