What is a goform log?

Answer :
To know about the goform logs, you need to understand that ISP routers are notorious for having bad security. Home routers in general aren't that great security wise, but some of the better ones at least provide firmware updates that fix known flaws. They provide better security than their ISP counterparts, and usually have a much better feature set as well.

I would consider this an exploit. As such, you should consider where and how you post information about this - the best way to handle such things in my view is through responsible disclosure:

"Responsible disclosure is a computer security term describing a vulnerability disclosure model. It is like full disclosure, with the addition that all stakeholders agree to allow a period of time for the vulnerability to be patched before publishing the details."

(Wikipedia - you can read the rest here: http://en.wikipedia.org/wiki/Responsible_disclosure)

OS level firewalls won't mitigate these kinds of attacks.