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// Other services

Port 1235: mosaicsyssvc1

Port 1235 is assigned by IANA to mosaicsyssvc1 (mosaicsyssvc1).

1235

How mosaicsyssvc1 works

Other services
client:1235mosaicsyssvc1response client:1235mosaicsyssvc1response

The client sends a request to port 1235 and the mosaicsyssvc1 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 1235 dangerous?

We have no specific security note for port 1235. 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 1235

ServicePortTransportDescriptionReferenceUpdated
mosaicsyssvc1 1235 TCP, UDP mosaicsyssvc1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1235, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1235'      # process listening on 1235
sudo lsof -nP -i :1235

macOS

sudo lsof -nP -i :1235

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1235 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1235
netstat -ano | findstr :1235

From another machine

nmap -p 1235 -sV <host>
sudo nmap -sU -p 1235 <host>
nc -zv <host> 1235

Block it in the firewall

sudo ufw deny 1235/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1235" -Direction Inbound -LocalPort 1235 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1235 used for?

Port 1235 is assigned by IANA to mosaicsyssvc1 (mosaicsyssvc1).

Is port 1235 TCP or UDP?

Port 1235 is registered for TCP and UDP.

Is it safe to open port 1235?

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 1235 is open?

On Linux run "ss -ltnup 'sport = :1235'", on macOS "lsof -nP -i :1235", and on Windows "netstat -ano | findstr :1235" to see the local process. From another machine, "nmap -p 1235 <host>" shows whether it is reachable.

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