HTTPfy

Port 9800 (davsrc)

IANA assigns port 9800 to davsrc: WebDav Source Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
davsrc TCP WebDav Source Port Ethan Fremen -
davsrc UDP WebDav Source Port Ethan Fremen -

Check what is listening on port 9800

Linux: is anything listening on TCP 9800?
sudo ss -tlnp 'sport = :9800'
Linux: UDP 9800
sudo ss -ulnp 'sport = :9800'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9800
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9800 '
Windows (Command Prompt)
netstat -ano | findstr :9800
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9800 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9800
From Windows
Test-NetConnection HOST -Port 9800
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9800

Block port 9800 in the firewall

ufw
sudo ufw deny 9800/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9800 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9800 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9800' -Direction Inbound -Protocol TCP -LocalPort 9800 -Action Block
ufw
sudo ufw deny 9800/udp
iptables
sudo iptables -A INPUT -p udp --dport 9800 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9800 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9800' -Direction Inbound -Protocol UDP -LocalPort 9800 -Action Block

Related ports

9753rasadv9762tungsten-http9801sstp-29802davsrcs

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