Countries like China, UAE, Iran and Saudi Arabia, Internet Censorship is inevitable. Their government has full control over the internet and has blocked sites like flickr, YouTube and many social networks, etc.
Despite that, creative people develop new tools to bypass these censorships, and one of these utilities to bypass flickr has been developed by an Irani citizen who has created a Firefox extension, called Access Flickr that will help you access Flickr in your country.
This will not only give you freedom of access, but you won't have to search for proxies too.
Just install the extension and restart your browser. There is no configuration, no menu, no icon. All needed configurations are done automatically. After restarting, you can access flickr.com, without any restriction!