- 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.
Port 5163: Shadow Backup
Port 5163 is assigned by IANA to sbackup (Shadow Backup).
5163
How sbackup works
File transfer & sharingFiles are sent over port 5163 in pieces and reassembled on the other side.
- Transport
- TCP
- 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
Is port 5163 dangerous?
We have no specific security note for port 5163. Its risk depends on the program actually listening on it. General advice for file transfer & sharing services:
IANA registry entries for port 5163
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| sbackup | 5163 | TCP | Shadow Backup | - | 2009-08-05 |
| - | 5163 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 5163, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5163' # process listening on 5163
sudo lsof -nP -i :5163macOS
sudo lsof -nP -i :5163
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5163 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5163 netstat -ano | findstr :5163
From another machine
nmap -p 5163 -sV <host> nc -zv <host> 5163
Block it in the firewall
sudo ufw deny 5163/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5163" -Direction Inbound -LocalPort 5163 -Protocol TCP -Action Block # Windows
What is port 5163 used for?
Port 5163 is assigned by IANA to sbackup (Shadow Backup).
Is port 5163 TCP or UDP?
Port 5163 is registered for TCP.
Is it safe to open port 5163?
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 5163 is open?
On Linux run "ss -ltnup 'sport = :5163'", on macOS "lsof -nP -i :5163", and on Windows "netstat -ano | findstr :5163" to see the local process. From another machine, "nmap -p 5163 <host>" shows whether it is reachable.
Other file transfer & sharing ports
: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