CyberHunter
Local dataset, no network
// File transfer & sharing

Port 15660: Backup Express Restore Server

Port 15660 is assigned by IANA to bex-xr (Backup Express Restore Server).

15660

How bex-xr works

File transfer & sharing
client:156601/32/33/3bex-xr client:156601/32/33/3bex-xr

Files are sent over port 15660 in pieces and reassembled on the other side.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
File transfer & sharing
01 Security

Is port 15660 dangerous?

We have no specific security note for port 15660. Its risk depends on the program actually listening on it. General advice for file transfer & sharing services:

  • Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).
  • Disable anonymous access and restrict shares or exports to known hosts.
  • Never publish file sharing protocols to the Internet.
02 Registry

IANA registry entries for port 15660

ServicePortTransportDescriptionReferenceUpdated
bex-xr 15660 TCP, UDP Backup Express Restore Server - 2015-02-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 15660, and is it reachable?

Linux

sudo ss -ltnup 'sport = :15660'      # process listening on 15660
sudo lsof -nP -i :15660

macOS

sudo lsof -nP -i :15660

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 15660 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 15660
netstat -ano | findstr :15660

From another machine

nmap -p 15660 -sV <host>
sudo nmap -sU -p 15660 <host>
nc -zv <host> 15660

Block it in the firewall

sudo ufw deny 15660/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 15660" -Direction Inbound -LocalPort 15660 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 15660 used for?

Port 15660 is assigned by IANA to bex-xr (Backup Express Restore Server).

Is port 15660 TCP or UDP?

Port 15660 is registered for TCP and UDP.

Is it safe to open port 15660?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Prefer encrypted protocols (SFTP, FTPS, SMB 3 with encryption).

How do I check if port 15660 is open?

On Linux run "ss -ltnup 'sport = :15660'", on macOS "lsof -nP -i :15660", and on Windows "netstat -ano | findstr :15660" to see the local process. From another machine, "nmap -p 15660 <host>" shows whether it is reachable.

05 Related
:445 SMB tcp · udp · critical risk :21 FTP tcp · udp · sctp · high risk :139 NetBIOS Session tcp · udp · high risk :69 TFTP udp · tcp · high risk :2049 NFS tcp · udp · sctp · high risk :873 rsync tcp · udp · high risk :20 File Transfer [Default Data] tcp · udp · sctp :115 Simple File Transfer Protocol tcp · udp

Latest vulnerability news

All news