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// Other services

Port 1075: RDRMSHC

Port 1075 is assigned by IANA to rdrmshc (RDRMSHC).

1075

How rdrmshc works

Other services
client:1075rdrmshcresponse client:1075rdrmshcresponse

The client sends a request to port 1075 and the rdrmshc service answers.

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
Other services
01 Security

Is port 1075 dangerous?

We have no specific security note for port 1075. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 1075

ServicePortTransportDescriptionReferenceUpdated
rdrmshc 1075 TCP, UDP RDRMSHC - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1075, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1075'      # process listening on 1075
sudo lsof -nP -i :1075

macOS

sudo lsof -nP -i :1075

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1075 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1075
netstat -ano | findstr :1075

From another machine

nmap -p 1075 -sV <host>
sudo nmap -sU -p 1075 <host>
nc -zv <host> 1075

Block it in the firewall

sudo ufw deny 1075/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1075" -Direction Inbound -LocalPort 1075 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1075 used for?

Port 1075 is assigned by IANA to rdrmshc (RDRMSHC).

Is port 1075 TCP or UDP?

Port 1075 is registered for TCP and UDP.

Is it safe to open port 1075?

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. Close the port if nothing on the host needs it.

How do I check if port 1075 is open?

On Linux run "ss -ltnup 'sport = :1075'", on macOS "lsof -nP -i :1075", and on Windows "netstat -ano | findstr :1075" to see the local process. From another machine, "nmap -p 1075 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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