If you have friends with access to other ISPs in other regions, another option could be to both get a box supporting VPN and build a VPN tunnel between you and your friend. You could then access the Internet through their ISP (assuming that the ports needed to establish the VPN are not also blocked by your ISP).
The best approach here is probably not a technical one, but rather one of petitioning your ISP along with a team of angry citizens to get the ISP to reverse this port blocking.
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