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Port 4847 (wfc)

IANA assigns port 4847 to wfc: Web Fresh Communication.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wfc TCP Web Fresh Communication Jonathan Bastnagel -
wfc UDP Web Fresh Communication Jonathan Bastnagel -

Registry dates for this port: registered 2007-09-17.

Check what is listening on port 4847

Linux: is anything listening on TCP 4847?
sudo ss -tlnp 'sport = :4847'
Linux: UDP 4847
sudo ss -ulnp 'sport = :4847'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4847
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4847 '
Windows (Command Prompt)
netstat -ano | findstr :4847
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4847 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4847
From Windows
Test-NetConnection HOST -Port 4847
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4847

Block port 4847 in the firewall

ufw
sudo ufw deny 4847/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4847 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4847 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4847' -Direction Inbound -Protocol TCP -LocalPort 4847 -Action Block
ufw
sudo ufw deny 4847/udp
iptables
sudo iptables -A INPUT -p udp --dport 4847 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4847 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4847' -Direction Inbound -Protocol UDP -LocalPort 4847 -Action Block

Related ports

4845wcr-remlib4846contamac-icm, contamac_icm4848GlassFish / Payara admin4849appserv-https

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