what is your originating IP? CIMBclicks specifically is blocking a lot of IP's from outside Malaysia since late December after we highlighted their security issues. This block is on their own servers, so its not a DNS issue. You are reaching CIMBClicks servers, but the server itself is throwing up a forbidden response due to either your originating IP or some other header from your browser that it is rejecting.

@ifourtos i don't think there is any ISP's out there which only gives you IPV6 without IPV4 at this point in time.