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// Other services

Port 1193: Five Across Server

Port 1193 is assigned by IANA to fiveacross (Five Across Server).

1193

How fiveacross works

Other services
client:1193fiveacrossresponse client:1193fiveacrossresponse

The client sends a request to port 1193 and the fiveacross 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 1193 dangerous?

We have no specific security note for port 1193. 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 1193

ServicePortTransportDescriptionReferenceUpdated
fiveacross 1193 TCP, UDP Five Across Server - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 1193, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1193'      # process listening on 1193
sudo lsof -nP -i :1193

macOS

sudo lsof -nP -i :1193

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1193 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1193
netstat -ano | findstr :1193

From another machine

nmap -p 1193 -sV <host>
sudo nmap -sU -p 1193 <host>
nc -zv <host> 1193

Block it in the firewall

sudo ufw deny 1193/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1193" -Direction Inbound -LocalPort 1193 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1193 used for?

Port 1193 is assigned by IANA to fiveacross (Five Across Server).

Is port 1193 TCP or UDP?

Port 1193 is registered for TCP and UDP.

Is it safe to open port 1193?

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 1193 is open?

On Linux run "ss -ltnup 'sport = :1193'", on macOS "lsof -nP -i :1193", and on Windows "netstat -ano | findstr :1193" to see the local process. From another machine, "nmap -p 1193 <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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