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Port 5320 (bsfserver-zn)

IANA assigns port 5320 to bsfserver-zn: Webservices-based Zn interface of BSF.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bsfserver-zn TCP Webservices-based Zn interface of BSF Bert Paul -

Registry dates for this port: registered 2008-05-01.

Check what is listening on port 5320

Linux: is anything listening on TCP 5320?
sudo ss -tlnp 'sport = :5320'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5320
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5320 '
Windows (Command Prompt)
netstat -ano | findstr :5320
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5320 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5320
From Windows
Test-NetConnection HOST -Port 5320

Block port 5320 in the firewall

ufw
sudo ufw deny 5320/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5320 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5320 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5320' -Direction Inbound -Protocol TCP -LocalPort 5320 -Action Block

Related ports

5318pkix-cmc5319roughtime5321bsfsvr-zn-ssl5343kfserver

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