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Port 15660 (bex-xr)

IANA assigns port 15660 to bex-xr: Backup Express Restore Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bex-xr TCP Backup Express Restore Server Catalogic Software Inc -
bex-xr UDP Backup Express Restore Server Catalogic Software Inc -

Registry dates for this port: registered 2008-03-19, last modified 2015-02-04.

Check what is listening on port 15660

Linux: is anything listening on TCP 15660?
sudo ss -tlnp 'sport = :15660'
Linux: UDP 15660
sudo ss -ulnp 'sport = :15660'
Linux / macOS: which process owns the port
sudo lsof -nP -i :15660
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':15660 '
Windows (Command Prompt)
netstat -ano | findstr :15660
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 15660 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 15660
From Windows
Test-NetConnection HOST -Port 15660
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 15660

Block port 15660 in the firewall

ufw
sudo ufw deny 15660/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 15660 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 15660 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 15660' -Direction Inbound -Protocol TCP -LocalPort 15660 -Action Block
ufw
sudo ufw deny 15660/udp
iptables
sudo iptables -A INPUT -p udp --dport 15660 -j DROP
nftables
sudo nft add rule inet filter input udp dport 15660 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 15660' -Direction Inbound -Protocol UDP -LocalPort 15660 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.