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// File transfer & sharing

Port 11202: DCSL Network Backup Services

Port 11202 is assigned by IANA to dcsl-backup (DCSL Network Backup Services).

11202

How dcsl-backup works

File transfer & sharing
client:112021/32/33/3dcsl-backup client:112021/32/33/3dcsl-backup

Files are sent over port 11202 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
01 Security

Is port 11202 dangerous?

We have no specific security note for port 11202. 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 11202

ServicePortTransportDescriptionReferenceUpdated
dcsl-backup 11202 TCP DCSL Network Backup Services - 2012-04-17
-11202-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 11202, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11202'      # process listening on 11202
sudo lsof -nP -i :11202

macOS

sudo lsof -nP -i :11202

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11202 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11202
netstat -ano | findstr :11202

From another machine

nmap -p 11202 -sV <host>
nc -zv <host> 11202

Block it in the firewall

sudo ufw deny 11202/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11202" -Direction Inbound -LocalPort 11202 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11202 used for?

Port 11202 is assigned by IANA to dcsl-backup (DCSL Network Backup Services).

Is port 11202 TCP or UDP?

Port 11202 is registered for TCP.

Is it safe to open port 11202?

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 11202 is open?

On Linux run "ss -ltnup 'sport = :11202'", on macOS "lsof -nP -i :11202", and on Windows "netstat -ano | findstr :11202" to see the local process. From another machine, "nmap -p 11202 <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

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