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// Other services

Port 1103: ADOBE SERVER 2

Port 1103 is assigned by IANA to adobeserver-2 (ADOBE SERVER 2).

1103

How adobeserver-2 works

Other services
client:1103adobeserver-2response client:1103adobeserver-2response

The client sends a request to port 1103 and the adobeserver-2 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 1103 dangerous?

We have no specific security note for port 1103. 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 1103

ServicePortTransportDescriptionReferenceUpdated
adobeserver-2 1103 TCP, UDP ADOBE SERVER 2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1103, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1103'      # process listening on 1103
sudo lsof -nP -i :1103

macOS

sudo lsof -nP -i :1103

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1103 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1103
netstat -ano | findstr :1103

From another machine

nmap -p 1103 -sV <host>
sudo nmap -sU -p 1103 <host>
nc -zv <host> 1103

Block it in the firewall

sudo ufw deny 1103/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1103" -Direction Inbound -LocalPort 1103 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1103 used for?

Port 1103 is assigned by IANA to adobeserver-2 (ADOBE SERVER 2).

Is port 1103 TCP or UDP?

Port 1103 is registered for TCP and UDP.

Is it safe to open port 1103?

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 1103 is open?

On Linux run "ss -ltnup 'sport = :1103'", on macOS "lsof -nP -i :1103", and on Windows "netstat -ano | findstr :1103" to see the local process. From another machine, "nmap -p 1103 <host>" shows whether it is reachable.

05 Related
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