Router Firewall

This is not an OS issue but given my experience with ME's regulars, I
thought this would be an appropriate place to obtain a resolution.

I have just returned from a 2 week vacation in Hilton Head. I travelled with
our laptop and had no trouble accessing the web or using Outlook while en
route. However once there, I could no longer send mail in Outlook, although
I could receive. The only other issue I had was that for some reason I could
not access a particular website (www.skygolf.com) in order to download
specific golf courses to my skycaddie GPS system. I initially thought that
the website was offline but after calling the support staff, it was
suggested that the problem was firewall related. It was not my firewall
software because I configured it to allow skygolf, so I am assuming it was
the router firewall.

The villa/condo we rented had broadband wireless internet. On one occasion I
was able to switch to another weaker wireless signal (offsite) that allowed
access to skygolf and also to send mail via Outlook but I could not find
that access again, which further reinforced the notion that the problem was
related to the hardware firewall. Thus the question is what are my options
if I should experience a similar problem in future travels? Is there a
workaround?

Thanks in advance.

Dan