I used iptables to disable access to the internet on one of my user accounts by following this thread.
Since I was only doing it for testing I didn't want it to be permanent. Further web searching taught me that I should have backed up my iptable rule first, but I didn't do that. I just jumped into the command line without even thinking.
I tried searching the web as well as other places in this forum, but only found smarter ways I could have done this.
Any help would be appreciated. If not, I can manage.