HTTPfy

Port 5723 (omhs)

IANA assigns port 5723 to omhs: Operations Manager - Health Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
omhs TCP Operations Manager - Health Service Gerardo Dilillo -
omhs UDP Operations Manager - Health Service Gerardo Dilillo -

Registry dates for this port: registered 2006-08.

Check what is listening on port 5723

Linux: is anything listening on TCP 5723?
sudo ss -tlnp 'sport = :5723'
Linux: UDP 5723
sudo ss -ulnp 'sport = :5723'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5723
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5723 '
Windows (Command Prompt)
netstat -ano | findstr :5723
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5723 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5723
From Windows
Test-NetConnection HOST -Port 5723
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5723

Block port 5723 in the firewall

ufw
sudo ufw deny 5723/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5723 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5723 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5723' -Direction Inbound -Protocol TCP -LocalPort 5723 -Action Block
ufw
sudo ufw deny 5723/udp
iptables
sudo iptables -A INPUT -p udp --dport 5723 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5723 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5723' -Direction Inbound -Protocol UDP -LocalPort 5723 -Action Block

Related ports

5721dtpt5722msdfsr5724omsdk5725ms-ilm

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