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// Other services

Port 38203: AppGate Policy Server

Port 38203 is assigned by IANA to agpolicy (AppGate Policy Server).

38203

How agpolicy works

Other services
client:38203agpolicyresponse client:38203agpolicyresponse

The client sends a request to port 38203 and the agpolicy 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 38203 dangerous?

We have no specific security note for port 38203. 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 38203

ServicePortTransportDescriptionReferenceUpdated
agpolicy 38203 TCP, UDP AppGate Policy Server - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 38203, and is it reachable?

Linux

sudo ss -ltnup 'sport = :38203'      # process listening on 38203
sudo lsof -nP -i :38203

macOS

sudo lsof -nP -i :38203

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 38203 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 38203
netstat -ano | findstr :38203

From another machine

nmap -p 38203 -sV <host>
sudo nmap -sU -p 38203 <host>
nc -zv <host> 38203

Block it in the firewall

sudo ufw deny 38203/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 38203" -Direction Inbound -LocalPort 38203 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 38203 used for?

Port 38203 is assigned by IANA to agpolicy (AppGate Policy Server).

Is port 38203 TCP or UDP?

Port 38203 is registered for TCP and UDP.

Is it safe to open port 38203?

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 38203 is open?

On Linux run "ss -ltnup 'sport = :38203'", on macOS "lsof -nP -i :38203", and on Windows "netstat -ano | findstr :38203" to see the local process. From another machine, "nmap -p 38203 <host>" shows whether it is reachable.

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