Stuck Webadmin access

Hi All

I am having a strange problem and I would need your help. For some reason, I am not able to access the webadmin via the internal network .I can see that the access is denied on the firewall (I have logged on for the webadmin access). I also haVE internet object as part of the allowed networks so I am fine accessing the box from the internet. Same setting were applied to user portal and I got the access back by removing the internet object and re adding it again

However, I can't do this for the webadmin access.Is there a way to perform this via SSH?

What I would like to do is remove the internet object from the webadmin allowed networks and re add it again

Thanks