Russia is considering whether to disconnect from the global internet briefly, as part of a test of its cyber-defences.

The test will mean data passing between Russian citizens and organisations stays inside the nation rather than being routed internationally.

A draft law mandating technical changes needed to operate independently was introduced to its parliament last year.

The test is expected to happen before 1 April but no exact date has been set.

The draft law, called the Digital Economy National Program, requires Russia's ISPs to ensure that it can operate in the event of foreign powers acting to isolate the country online.

Nato and its allies have threatened to sanction Russia over the cyber-attacks and other online interference which it is regularly accused of instigating.

The measures outlined in the law include Russia building its own version of the net's address system, known as DNS, so it can operate if links to these internationally-located servers are cut.

Currently, 12 organisations oversee the root servers for DNS and none of them are in Russia. However many copies of the net's core address book do already exist inside Russia suggesting its net systems could keep working even if punitive action was taken to cut it off.

The test is also expected to involve ISPs demonstrating that they can direct data to government-controlled routing points. These will filter traffic so that data sent between Russians reaches its destination, but any destined for foreign computers is discarded.

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