Advanced Troubleshooting¶

Force IPv4 Connections¶

In PuTTY's IP address box, type in your NetID followed by Pronto's IP address as you normally would. (Your list of saved sessions may look different)

On the left, click on the Connection category.

ip_connection

Under Internet protocol version, select 'IPv4'.

ip_change2

Adjust any other PuTTY settings you normally would use if needed (i.e. X11 Forwarding setup), and click Open to connect back to Pronto.

If you are using a regular terminal, simply type in:

ssh -4 <YourNetID>@pronto.las.iastate.edu

If you are using an ISU-owned machine, please contact your local IT support to do this step.

Open up PowerShell (run as Administrator) and run the following commands:

Set-NetIPv6Protocol -RandomizeIdentifiers Disabled
Set-NetIPv6Protocol -UseTemporaryAddresses Disabled

You may need to reboot before this change is effective.

Open a terminal and run:

sudo sysctl -w net.ipv6.conf.all.use_tempaddr=0

To make this change persist between reboots, perform the following steps:

Open /etc/sysctl.conf in your favorite editor. If the file is non-existent a new, blank file will be created.

sudo nano /etc/sysctl.conf

At the end of the file, add the following line:

net.ipv6.conf.all.use_tempaddr=0

Save and exit.

At any time you can verify the state of this setting with:

sysctl net.ipv6.conf.all.use_tempaddr

which should return: net.ipv6.conf.all.use_tempaddr = 0