Sophos WAF Security Request body (Content-Length) is larger than the configured limit

Question

Hello everyone I have a Synology NAS behind a Sophos firewall (WAF). On this server is Synology Drive which provides a Cloud Infrastructure. 
 Sadly I cannot upload anything over 1 GB which is problematic. Internally without the WAF it works. 
 The issue seems to be following: 
 [security2:error] [pid 19741:tid 1397265267238 40] [client 192.168.1.136:55592] [client 192.168.1.136] ModSecurity: Request bod y (Content-Length) is larger than the configured limit (1073741824). [hostname " xxxxxxxxxxxx"] [uri "/diribitor/webapi/entry.cgi"] [unique_id "Y-jDRqs5Zr7J v80KVSjgzQAAAFw"] 
 I then tried to up the limit what seems to be not possible:

I don't know what I could do other than this? Can anyone help? Thank you beforehand Greetings from Switzerland Alessio

Vivek Jagad · Answer

Hello Ale_V2 , Thank you for reaching out to the community, the following link has the steps in the post itself and can help - RE: Exchange / WAF - OWA, ActiveSync 1MB File Limit - SFOS 19 GA

Vivek Jagad · Answer

Hey Ale_V2 , By default the limit is 1 MB i.e. 1048576 bytes. You can follow the steps mentioned here to increase the limit to your desired value - https://5t9h.short.gy/Sophos-Waf-limit