Check for String in TCP Payload from a specific position

Thank you for your response. I'm not sure if the link you provided would be related or would be the closest answer as what i just want to do is to read the 6 bytes on this specific position and try to confirm if it is the match i'm looking for. Like for example, from the TCP payload, i would skip 5 bytes which would be random characters, and start reading only for the next 6 bytes after this? Thanks again.

 

 

 

 

Lez