ICMP type? Care to elaborate what ICMP type here means? Also, Denial of Service (DoS) attack and stealing data are not exactly related.On 27th there was a glitch in Air India servers and which led to the delay and cancellations of more than 130 air India flights and there after on 29th there was a glitch in IGI's immigration server.
Pattern tells that it was a cyber attack of denial of service ICMP type. First they targeted the air India servers made them the bots and later used them as bots to target immigration server at the air port after gaining access on the 27th itself. Looks like huge amount of data has been stolen from the immigration servers. Especially the passport numbers. Government is not telling the truth.
Chinese have this capability and also shows their foot print.