HTTPfy

Port 4844 (gw-log)

IANA assigns port 4844 to gw-log: nCode ICE-flow Library LogServer.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gw-log TCP nCode ICE-flow Library LogServer Ross Swithenbank -
gw-log UDP nCode ICE-flow Library LogServer Ross Swithenbank -

Registry dates for this port: registered 2006-09.

Check what is listening on port 4844

Linux: is anything listening on TCP 4844?
sudo ss -tlnp 'sport = :4844'
Linux: UDP 4844
sudo ss -ulnp 'sport = :4844'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4844
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4844 '
Windows (Command Prompt)
netstat -ano | findstr :4844
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4844 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4844
From Windows
Test-NetConnection HOST -Port 4844
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4844

Block port 4844 in the firewall

ufw
sudo ufw deny 4844/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4844 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4844 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4844' -Direction Inbound -Protocol TCP -LocalPort 4844 -Action Block
ufw
sudo ufw deny 4844/udp
iptables
sudo iptables -A INPUT -p udp --dport 4844 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4844 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4844' -Direction Inbound -Protocol UDP -LocalPort 4844 -Action Block

Related ports

4842gw-asv4843opcua-tls4845wcr-remlib4846contamac-icm, contamac_icm

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