Photon don't connect to local network but Mobile networks please help

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hello every one

I am facing a weird problem

I am using PUN in my game

this is what happening

when I use mobile network connectivity like 3G or 4G its works fine
my game works good

problem starts when I connect to my local W LAN the game does not work

it just shows connecting to name server and nothing further
after sometime it shows error unable to connect to server

I have tested this using photon DEMOS and same result is there

for 3G and 4G it will work fine but as soon as I connect to my wifi it will not respond further and will not gt connect.

kindly help in resolving this issue
thanks