Depends on where you from ?...mostly you need a transit visa unless you have a US, Australia or EU passport..There are some other countries too where they allow VOAEdited: 12 May 2018, 23:18
I just googled it (which I'm sure you should have been capable of doing) and read that you can have 96 hour visa free entry.
Thanks. That was old post that's why askedEdited: 13 May 2018, 00:54
My connecting flight is after more than 4 hours. Whether I will require any permit or visa even to stay at airport for connecting flight?