I need to configure external access for a service based on SAP Business One. The service in this example is a Mobile service so one can use a mobile app provided by SAP.
In order to use the app, the URL needs to be externally accessible. We want to use Sophos WAF (Web Application Firewall) as a reverse proxy to make it accessible from an external source.
The problem is the following:
External access with NAT and a specific port works however external access with the Sophos WAF as the reverse proxy fails. We get a HTTP ERROR 500 when trying to access the URL. In the tomcat logs of the SAP Server I could find this extra information:
java.lang.RuntimeException: None of SP's internal [
https://sapinternal:port/service/] and external address [https://sapextern.domain.com:port/service] haven't been found in value of the "x-forwarded-for" header [public ip-address of the client].
Any advice on how to resolve this or why this error appears when using Sophos WAF instead of NAT is appreciated.
