Advanced Dialog Rule (Fragmented and Analysis)

Hello, I’m new in this forum!
I have a question about two settings in the Advanced dialog. For my challenge it is necessary to remove the check from “Block fragmented IP datagrams” and “Do Protocol Analysis”. Now my question: What is my Risk to do this.
The need to do this is that an Internal Network card will receive a status from an other Internal Network card. And if Network card is queering the status the IP Protocol will be Fragmented and Blocked.

I only wanted to know if I do this to get the status from the Network Card how can someone attack my Computer throug the Network or Virus?

Thanks for helping me!
Greetings from Germany!