right now i using palo alto lab. and this box not taking default credentials like admin/admin. please help how to login.

hi this is the Virtual box you need to enter default username and password as admin/admin 7to10 times.

while you are using 1st time.

Yes its strange but true, you have to enter default username/password which is admin/admin on Palo Alto devices several times before it accepts these credentials. This is also true with Palo Alto hardware devices. I have not seen this behaviour in any device. In Cisco latest vEdge devices, they do not accept username and password until they completely bootup.

Just assume Palo Alto has designed this by purpose and accept that strange technique to enter default username and password several times.