How ISPs block websites and why it doesn’t help
New Delhi: India blocked 245 web pages for provocative content on Monday in an effort to prevent the spread of hate messages and lessen communal tensions in the country, and suggested via an official release on the website of the Press Information Bureau that more could follow.
As was widely reported in the days that followed, most websites blocked were not related to the ethnic clashes in Assam.
Pranesh Prakash, programme manager with the Bangalore-based Centre for Internet and Society, analysed the sites which were listed by the government. In his analysis, 33% of all blocked addresses were on Facebook, 27.8% on YouTube, 9.7% on Twitter and the rest were spread over a number of different websites including Wikipedia, Firstpost.com and TimesofIndia.Indiatimes.com.
Prakash says, “I don’t believe that the decision to block sites was politically motivated, but I do believe that in trying to prevent harm, the government has gone overboard.”
He also writes in his analysis, “Even though many of the items on that list do deserve (in my opinion) to be removed [...] the people and companies hosting the material should have been asked to remove it, instead of ordering the ISPs to block them.”
Prakash also pointed out, “There are numerous egregious mistakes. Even people and posts debunking rumours have been blocked, and it is clear that the list was not compiled with sufficient care.”
Of course, India’s overall record on Internet censorship isn’t great, with the current laws encouraging Internet service providers (ISPs) to take down content without investigating individual cases properly. And that is not even taking into consideration official government orders, such as this decision to block websites.
How does it work?
The process of blocking content for an ISP is very simple. After all, any content that is coming from a website to your computer has to travel through the ISP, giving it ample opportunity to observe and censor banned content.
Think of it like this—you’re on an island, with no way to reach the mainland (Internet) where all the websites are. The ISP builds a bridge connecting you to the mainland, and charges you to let cars (data) from the sites come to you, by opening the road. Each web page has a unique ID, like a licence plate. If the government tells the ISP to block a specific page, it’s added to the blacklist, and isn’t allowed on the bridge. The government could also block a full domain, such as Facebook.com, which would be like blocking all cars with DL plates, instead of specific numbers.
New Delhi based cyber security consultant Dominic K. says, “The content is still there and can be accessed from outside India, so these measures are really very ineffective. People can use proxies or a virtual private network (VPN) to circumvent these measures with ease, by appearing to be a different site; so banning sites does nothing to deter malicious users.”
Proxies are websites that load blocked sites for you—if the proxy is not using the ISP doing the block, they can still load the content from the blocked site and present it to the users, since the blocklists simply block websites, and not their content.
VPNs work in a similar fashion, creating a virtual presence for the user outside of their own country. This can be done to circumvent blocks and access region-specific content, but is also a perfectly legitimate tool, and can increase your security greatly.
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