ICMP blocking issue from outside network

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Hi all,

I have PFsense running on a Dell R210 in my office network for sandbox testing and configuring and we have a PC connected to this network acting as a remote probe for PRTG. My question is, i am able to ping my outside network when connected to PFsense (10.200.1.0), but when i attempt ping anything on the inside from our office network (172.15.0.0) i'm unable to reach anything. I have a rule for ICMP enabled for any/any and all. But am i missing something?

Thanks