Webdynpro ABAP not working from internet

[Former Member]

Hello,

I´m new at webdynpro and portal...

We have a ess portal with webdynpro abap and java. Our employees may access it from intranet and all works fine, and from internet when they are in the outside.

From internet the webdynpro abap gives the message that the server cannot be reached. The server is our production backend and is not open to the exterior.

Is there a way to make this work, from inside and outside?

Teresa

[thomas_jung]

This isn't directly a web dynpro issue. Your network administrators will need to open the network firewall to allow access to your backend system if that is what you want to happen. Nothing really needs to be done from the Web Dynpro side.

If you do decide to allow direct access to your backend system via the internet, you should take some security precautions. You should consider using a reverse proxy - like the SAP Web Dispatcher (or simliar 3rd party tools). Also you should consider setting up an alternative virtual host on your ABAP system and only activating the bare minimum of ICF nodes on this secondary virtual host. But once again this is network setup and AS ABAP setup, not anything WDA specific.

[SergioFerrari]

Right now I'm looking for the list of paths to be allowed in the firewall.

A customer is reporting strange problems related to the MS Excel download standard functionality of the WDA ALV.

From the intranet everything works fine, from Internet everything works fine in Firefox but in Internet Explorer (IE) this MS Excel download doesn't work.

Note 1088717 well suggest to run report rsicf_service_activation and to turn on the right ICF services but it seems like some special URL are used to manage the MS Excel download from ALV.

Any hint to setup the most restrictive but still working rules in a firewall for protect a WDA with ALV MS Excel?

Sergio

[Former Member]

We don´t want to give access to our backend system.

I´ve tried to create a new virtual host (host1), with the path webdynpro

ame_application, wtih the parameter is/HTTP/virt_host_1, pointing to another server. This gives the error SHTTP082 - couldn´t find information about host and door.

I thought this was related to webdynpro abap because the error is when we try to access it. Of course there are other issues involved but since i don´t know much about webdynpro, for me the problem could be in it.

Teresa

[thomas_jung]

There is no separate service if this internet or intranet. So if it works internally its not a setup issue on the WDA side. More likely its a browser security issue. Different security zones in IE have different security settings.

[SergioFerrari]

I'll personally verify next week and I'll update the thread.

Thanks for the hint.

Sergio

[Former Member]

In what forum do you suggest i place this post?

Teresa

[SergioFerrari]

As usual Brian McKeller known about my problem 4 years ago [http://wiki.sdn.sap.com/wiki/display/BSP/HandlingBinaryData|http://wiki.sdn.sap.com/wiki/display/BSP/HandlingBinaryData].

It was related to Ie 6.0 patch [Internet Explorer file downloads over SSL do not work with the cache control headers|https://service.sap.com/sap/support/notes/886277] required when you use https till R/P and http fro R/P and SAP.

Sergio

Edited by: Sergio Ferrari on Jul 21, 2010 10:09 PM

[Former Member]

Hi Sergio,

I am facing the same issue in our project. We have published the portal url as bookmark in Juniper accelerator. When we are trying to export data from ALV to excel we are getting error (prompted by browser). This WDA application connected through portl using Web dispatcher. our Juniper is serverd through https and web diaptcher and underlying ABAP WAS access are http connections.

But we have almost similar functinality in WDJ Application where as table data is doenlaoded in to CSV file which is working fine. This applivcation is also ported in same portal using Web dispatcher where as both java engine of WDJ and web dispatcher are served as http only.

Can you through some light on this. What can be the fix for this.

Regards

Ravindra

[SergioFerrari]

Yes sure,

so you have to set the parameter wdisp/add_clientprotocol_header = 1 in the web dispatcher profile.

Good references are:

[http://help.sap.com/saphelp_nw04s/helpdata/en/de/89023c59698908e10000000a11402f/frameset.htm|http://help.sap.com/saphelp_nw04s/helpdata/en/de/89023c59698908e10000000a11402f/frameset.htm]

[http://wiki.sdn.sap.com/wiki/display/BSP/HandlingBinaryData|http://wiki.sdn.sap.com/wiki/display/BSP/HandlingBinaryData]

and this

[http://help.sap.com/saphelp_nw04s/helpdata/en/9a/53a2a4a45e244aa189c2b7065a0b78/frameset.htm|http://help.sap.com/saphelp_nw04s/helpdata/en/9a/53a2a4a45e244aa189c2b7065a0b78/frameset.htm]

Sergio

[Former Member]

Hola Teresa!

Is your problem solved?

We are facing the same error code....

CU

Peter