this is amazingly didactical... really enjoy this.

On the Ubuntu Linux family, for instance, you can fix it with the following steps:

Open /etc/sysctl.conf, with an editor, such as vim. Enter the line: net.ipv4.tcp_challenge_ack_limit = 999999999 Save the file. Use the shell command "sysctl -p" to update the configuration.

@JaredBusch said:

@coliver said:

@JaredBusch said:

Disabke SELinux and see if it works. Then if so, add the port as allowed to SELinux?

Looks like it was SELinux, setting it to permissive allowed the port to be used. Now to figure out how to allow the port in SELinux.

semanage port -m -t http_port_t -p tcp 82

That did it thanks.