network not pingable form outside

I have weird network issues, I am able to ping everything from the inside at the location but not when I am outside od the location.

Secondary site. There is a L2L tunnel to primary site. I can't pint anything from the primary site to secondary, while the network is fully functional at the secondary site. This happened out of nowhere. What could be the issue? This worked a day ago. thanks
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Shark AttackNetwork adminAsked:
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MiftaulCommented:
Which firewall are you using. Can you check the acl in primary site please. They should match the secondary site subnet.
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Shark AttackNetwork adminAuthor Commented:
Im using 5520's on both ends. Access lists mach exactly on both ends.
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Shark AttackNetwork adminAuthor Commented:
let me clarify also, when im at the secondary location i can ping everything in there (all subnets) but i can't ping form the secondary to primary site and vise versa.
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Shark AttackNetwork adminAuthor Commented:
one of the interfaces was using a duplicate IP which was interfering in a way. After dropping the tunnel I was all up and running
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Shark AttackNetwork adminAuthor Commented:
one of the interfaces was using a duplicate IP which was interfering in a way. After dropping the tunnel I was all up and running
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