HTTPfy

Port 4050 (cisco-wafs)

IANA assigns port 4050 to cisco-wafs: Wide Area File Services.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cisco-wafs TCP Wide Area File Services Etai Lev Ran -
cisco-wafs UDP Wide Area File Services Etai Lev Ran -

Registry dates for this port: registered 2005-02.

Check what is listening on port 4050

Linux: is anything listening on TCP 4050?
sudo ss -tlnp 'sport = :4050'
Linux: UDP 4050
sudo ss -ulnp 'sport = :4050'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4050
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4050 '
Windows (Command Prompt)
netstat -ano | findstr :4050
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4050 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4050
From Windows
Test-NetConnection HOST -Port 4050
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4050

Block port 4050 in the firewall

ufw
sudo ufw deny 4050/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4050 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4050 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4050' -Direction Inbound -Protocol TCP -LocalPort 4050 -Action Block
ufw
sudo ufw deny 4050/udp
iptables
sudo iptables -A INPUT -p udp --dport 4050 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4050 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4050' -Direction Inbound -Protocol UDP -LocalPort 4050 -Action Block

Related ports

4047ctp-state4049wafs4051cppdp4052interact

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