HTTPfy

Port 9753 (rasadv)

IANA assigns port 9753 to rasadv.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rasadv TCP rasadv Dave Thaler 2 -
rasadv UDP rasadv Dave Thaler 2 -

Check what is listening on port 9753

Linux: is anything listening on TCP 9753?
sudo ss -tlnp 'sport = :9753'
Linux: UDP 9753
sudo ss -ulnp 'sport = :9753'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9753
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9753 '
Windows (Command Prompt)
netstat -ano | findstr :9753
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9753 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9753
From Windows
Test-NetConnection HOST -Port 9753
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9753

Block port 9753 in the firewall

ufw
sudo ufw deny 9753/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9753 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9753 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9753' -Direction Inbound -Protocol TCP -LocalPort 9753 -Action Block
ufw
sudo ufw deny 9753/udp
iptables
sudo iptables -A INPUT -p udp --dport 9753 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9753 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9753' -Direction Inbound -Protocol UDP -LocalPort 9753 -Action Block

Related ports

9747l5nas-parchan9750board-voip9762tungsten-http9800davsrc

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