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Port 4049 (wafs)

IANA assigns port 4049 to wafs: Wide Area File Services.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wafs TCP Wide Area File Services Yuval Hager -
wafs UDP Wide Area File Services Yuval Hager -

Registry dates for this port: registered 2006-01.

Check what is listening on port 4049

Linux: is anything listening on TCP 4049?
sudo ss -tlnp 'sport = :4049'
Linux: UDP 4049
sudo ss -ulnp 'sport = :4049'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4049
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4049 '
Windows (Command Prompt)
netstat -ano | findstr :4049
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4049 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4049
From Windows
Test-NetConnection HOST -Port 4049
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4049

Block port 4049 in the firewall

ufw
sudo ufw deny 4049/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4049 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4049 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4049' -Direction Inbound -Protocol TCP -LocalPort 4049 -Action Block
ufw
sudo ufw deny 4049/udp
iptables
sudo iptables -A INPUT -p udp --dport 4049 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4049 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4049' -Direction Inbound -Protocol UDP -LocalPort 4049 -Action Block

Related ports

4046acp-proto4047ctp-state4050cisco-wafs4051cppdp

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