HTTPfy

Port 244 (inbusiness)

IANA assigns port 244 to inbusiness.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
inbusiness TCP inbusiness Derrick Hisatake -
inbusiness UDP inbusiness Derrick Hisatake -

Check what is listening on port 244

Linux: is anything listening on TCP 244?
sudo ss -tlnp 'sport = :244'
Linux: UDP 244
sudo ss -ulnp 'sport = :244'
Linux / macOS: which process owns the port
sudo lsof -nP -i :244
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':244 '
Windows (Command Prompt)
netstat -ano | findstr :244
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 244 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 244
From Windows
Test-NetConnection HOST -Port 244
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 244

Block port 244 in the firewall

ufw
sudo ufw deny 244/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 244 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 244 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 244' -Direction Inbound -Protocol TCP -LocalPort 244 -Action Block
ufw
sudo ufw deny 244/udp
iptables
sudo iptables -A INPUT -p udp --dport 244 -j DROP
nftables
sudo nft add rule inet filter input udp dport 244 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 244' -Direction Inbound -Protocol UDP -LocalPort 244 -Action Block

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