HTTPfy

Port 5988 (wbem-http)

IANA assigns port 5988 to wbem-http: WBEM CIM-XML (HTTP).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wbem-http TCP WBEM CIM-XML (HTTP) Jim Davis -
wbem-http UDP WBEM CIM-XML (HTTP) Jim Davis -

Check what is listening on port 5988

Linux: is anything listening on TCP 5988?
sudo ss -tlnp 'sport = :5988'
Linux: UDP 5988
sudo ss -ulnp 'sport = :5988'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5988
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5988 '
Windows (Command Prompt)
netstat -ano | findstr :5988
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5988 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5988
From Windows
Test-NetConnection HOST -Port 5988
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5988

Block port 5988 in the firewall

ufw
sudo ufw deny 5988/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5988 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5988 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5988' -Direction Inbound -Protocol TCP -LocalPort 5988 -Action Block
ufw
sudo ufw deny 5988/udp
iptables
sudo iptables -A INPUT -p udp --dport 5988 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5988 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5988' -Direction Inbound -Protocol UDP -LocalPort 5988 -Action Block

Related ports

5986WinRM (HTTPS)5987wbem-rmi5989wbem-https5990wbem-exp-https

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