HTTPfy

Port 9023 (swa-1)

IANA assigns port 9023 to swa-1: Secure Web Access - 1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
swa-1 TCP Secure Web Access - 1 Tim McGranaghan -
swa-1 UDP Secure Web Access - 1 Tim McGranaghan -

Check what is listening on port 9023

Linux: is anything listening on TCP 9023?
sudo ss -tlnp 'sport = :9023'
Linux: UDP 9023
sudo ss -ulnp 'sport = :9023'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9023
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9023 '
Windows (Command Prompt)
netstat -ano | findstr :9023
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9023 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9023
From Windows
Test-NetConnection HOST -Port 9023
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9023

Block port 9023 in the firewall

ufw
sudo ufw deny 9023/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9023 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9023' -Direction Inbound -Protocol TCP -LocalPort 9023 -Action Block
ufw
sudo ufw deny 9023/udp
iptables
sudo iptables -A INPUT -p udp --dport 9023 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9023' -Direction Inbound -Protocol UDP -LocalPort 9023 -Action Block

Related ports

9021panagolin-ident9022paragent9024swa-29025swa-3

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