- 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.
Port 761:
Port 761 is assigned by IANA to rxe ().
761
How rxe works
Other servicesThe client sends a request to port 761 and the rxe 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
- Well-known (0-1023)
- Category
- Other services
Is port 761 dangerous?
We have no specific security note for port 761. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 761
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| rxe | 761 | TCP, UDP | - | - |
// source: IANA service name and port number registry
Which program uses port 761, and is it reachable?
Linux
sudo ss -ltnup 'sport = :761' # process listening on 761
sudo lsof -nP -i :761macOS
sudo lsof -nP -i :761
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 761 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 761 netstat -ano | findstr :761
From another machine
nmap -p 761 -sV <host> sudo nmap -sU -p 761 <host> nc -zv <host> 761
Block it in the firewall
sudo ufw deny 761/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 761" -Direction Inbound -LocalPort 761 -Protocol TCP -Action Block # Windows
What is port 761 used for?
Port 761 is assigned by IANA to rxe ().
Is port 761 TCP or UDP?
Port 761 is registered for TCP and UDP.
Is it safe to open port 761?
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 761 is open?
On Linux run "ss -ltnup 'sport = :761'", on macOS "lsof -nP -i :761", and on Windows "netstat -ano | findstr :761" to see the local process. From another machine, "nmap -p 761 <host>" shows whether it is reachable.
Other other services ports
: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