Sophos WAF: HTTP Error 500 with external access to SAP Business One

Hallo and welcome to the UTM Community!

Please copy here about 60 lines from the WAF log where the 500 error occurs near the end.

Cheers - Bob

Hello Bob,

this was the only thing that had something to do with the web request:

The lines before the live-protocol of the WAF were requests for different sites.

httpd: id="0299" srcip="a.b.c.d" localip="w.x.y.z" size="290" user="-" host="" method="GET" statuscode="500" reason="-" extra="-" exceptions="-" time="5995" url="/service/" server="sapextern.domain.com:xyz" port="xyz" query="" referer="-" cookie="JSESSIONID=AB4A27CBDBB6A9724A6340C83F97E270" set-cookie="-" websocket_scheme="-" websocket_protocol="-" websocket_key="-" websocket_version="-" uid="Ywx2YUECIALHM7nvKL3NfwAAAOI"

This can be found on the Tomcat server where the site is running:

"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]"

Kind regards
Saphos

WAF statuscode="500" means the server doesn't like the WAF proxy.  What does the SAP community say about the error message on your server?

Cheers - Bob

WAF statuscode="500" means the server doesn't like the WAF proxy.  What does the SAP community say about the error message on your server?

Cheers - Bob

Haven't heard anything from the community so far.

The offical SAP support recommended that we use nginx as a reverse proxy so I hope that somebody from the community has any experience with this topic.

Kind regards
Saphos

You will definitely want to have your reseller open a case with Sophos Support.  I suspect an Exception or two would resolve this, but someone needs to get in and look at the logs and your configuration.

Cheers - Bob