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After installing keiro firewall i cant sign in to yahoo account and gmail....why is that?
Please help me to solve this problem....

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Try lowering the MTU on the client machines. Download Dr TCP from this website:

Run Dr TCP on one of the client machines and use it to set the MTU to 1300 network card on the client machine.

Reboot Windows on the client machine and then try Yahoo's website again. See if it now works.

If lowering the MTU does fix the issue then lower it on every client machine. Do not modify the MTU on the WinRoute computer.
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