So Dave you don't have a dedicated firewall or is your router both a router and firewall combo; if you don't know then what brand/model is the router?
You are on the money with
My initial thoughts on your response brought me back to the help that eWay is giving me.....being that I can log into their web based portal that is https, port 443 should not be an issue.
so another thing to diagnosis is latency, ie. does the request time out before the service answers? There service may have an incompatibility with your router - this would only be the case if they've recently made changes which the didn't seem to answer in their response.
Try this to help provide more diagnosis informtion:
[*]To determine if an intermediate device is blocking you or latency is poor, open a command line and attempt to traceroute using the traceroute utility
tracert [LEFT]<font color='#333333'><font face='Consolas'><font face='Verdana'>host.address.com</font> -d</font></font>[/LEFT]
the -d tells it to not map to host names.
[*]From the previous traceroute you'll get the IP of the host.address.com (denoting them as x in the telnet code) then telnet:
telnet x.x.x.x 443
see if the telnet establishes an initial connection. if the service doesn't respond you get a message like "Could not open a connection to host on port 443 : Connect failed" otherwise it will connect and wait (with a flashing cursor) for input. You may need to go through each IP that was listed in the traceroute to find if one of the intermidiate routes is causing a problem.
[*]You should also consider asking your other office what type of router they are using and try a similar model at your location.