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Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
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# Check the port for torchrun is open via ncat
## Top
Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
This is my script (connection_test.sh) that tests if a connection between two computer of a given port is possible:
You need the master_ip and master_port:
```shell
master_ip="10.10.10.10"
master_port="40001"
python_file="main.py"
ip_check=`ip addr | grep $master_ip | wc -l`
if [[ $ip_check == "1" ]]
then
echo "Master"
echo "OK OK OK OK OK OK OK" | ncat -l -p $master_port
else
echo "Client"
ncat $master_ip $master_port
```
If this fails, the port is already used or your firewall settings is blocking it.