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// Other services

Port 1053: Remote Assistant (RA)

Port 1053 is assigned by IANA to remote-as (Remote Assistant (RA)).

1053

How remote-as works

Other services
client:1053remote-asresponse client:1053remote-asresponse

The client sends a request to port 1053 and the remote-as 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 1053 dangerous?

We have no specific security note for port 1053. 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 1053

ServicePortTransportDescriptionReferenceUpdated
remote-as 1053 TCP, UDP Remote Assistant (RA)
Reported: Unauthorized Use Known on port 1053
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1053, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1053'      # process listening on 1053
sudo lsof -nP -i :1053

macOS

sudo lsof -nP -i :1053

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1053 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1053
netstat -ano | findstr :1053

From another machine

nmap -p 1053 -sV <host>
sudo nmap -sU -p 1053 <host>
nc -zv <host> 1053

Block it in the firewall

sudo ufw deny 1053/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1053" -Direction Inbound -LocalPort 1053 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1053 used for?

Port 1053 is assigned by IANA to remote-as (Remote Assistant (RA)).

Is port 1053 TCP or UDP?

Port 1053 is registered for TCP and UDP.

Is it safe to open port 1053?

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 1053 is open?

On Linux run "ss -ltnup 'sport = :1053'", on macOS "lsof -nP -i :1053", and on Windows "netstat -ano | findstr :1053" to see the local process. From another machine, "nmap -p 1053 <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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