HTTPfy

Port 22125 (dcap)

IANA assigns port 22125 to dcap: dCache Access Protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dcap TCP dCache Access Protocol Christoph Anton Mitt -

Registry dates for this port: registered 2009-03-10.

Check what is listening on port 22125

Linux: is anything listening on TCP 22125?
sudo ss -tlnp 'sport = :22125'
Linux / macOS: which process owns the port
sudo lsof -nP -i :22125
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':22125 '
Windows (Command Prompt)
netstat -ano | findstr :22125
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 22125 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 22125
From Windows
Test-NetConnection HOST -Port 22125

Block port 22125 in the firewall

ufw
sudo ufw deny 22125/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 22125 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 22125 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 22125' -Direction Inbound -Protocol TCP -LocalPort 22125 -Action Block

Related ports

22004optohost00422005optohost00422128gsidcap22222easyengine

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