Expose ECC to internet via webdispatcher

[Former Member]

Dear Experts,

I have installed SAP webdispatcher on our SAProuter machine (located in DMZ) which is statically NATed to a public IP (for OSS connection)

Is it possible to expose the ECC server to internet via webdispatcher using the public IP of the SAProuter machine?

The requirement for this is because of the problem mentioned in below question:

/thread/1443294 [original link is broken]

If yes, then what all steps are required? Please help on this. I already got some help from the below link, but not clear how to impelemnt this.

Can anyone, please explain me in detail, how to achieve this?

Thanks & Regards,

Ashish Khanduri

[Former Member]

Hi Nelis,

One interesting thing that I found is that there is diffrence in URL generated by DEV/QAS & PRD ESS portals.

When, I click on Travel Module in ESS-DEV, I get below URL:

http://ceerpdev.cairnindia.com:8001/sap/bc/webdynpro/sap/zhr_travel_company_code/;sap-ext-sid=8kiwf3...LPHzFjNcmLY3hWPrhP_5PQ/?sap-contextid=SID%3aANON%3aceerpdev_CED_01%3aSlfjlD21PgUeepTVjPpENQN8OsvECZQ0Y2hX2WeV-NEW

Similarly, for ESS-QAS, I get below URL:

http://ceerpqal.cairnindia.com:1080/sap/bc/webdynpro/sap/zhr_travel_company_code/;sap-ext-sid=htJ99O...Xv*KbDHbG4sK0juhnkl7HA/?sap-contextid=SID%3aANON%3aceerpqal_CEQ_01%3afnOWPFQYpzSMOxwFo44KIaUc13qtKbhlg6fo63Rz-NEW

But, for ESS-PRD, I get below URL:

http://ceerpappl.cairnindia.com:1080/sap/bc/webdynpro/sap/zhr_travel_company_code/;sap-ext-sid=mPvzd...HbRmXCefq36*WmjZQkf76w

And, the interseting part is that in SAProuter machine (in DMZ) travel module is working absolutely fine on ESS-DEV/QAS, without any entry in /etc/hosts file, neither is SAProuter machine in domain, so that it could pick entry from DNS server.

But, on the same machine in ESS-PRD travel module is not working. Any suggestions on this???

Regards,

Ashish Khanduri

Edited by: Ashish Khanduri on Nov 16, 2009 11:28 AM

[nelis]

And, the interseting part is that in SAProuter machine (in DMZ) travel module is working absolutely fine on ESS-DEV/QAS, without any entry in /etc/hosts file, neither is SAProuter machine in domain, so that it could pick entry from DNS server.

Are you using a proxy server in your browser to access the above systems ? If proxy is setup to exclude your DEV/QAS system then same must be done for PRD.

I don't know anything about this "travel module" so I can only guess what might be happening. Maybe trace file in SMICM will give you more information on the error.

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Nelis

[Former Member]

Dear Nelis/Raghu,

Thanks for your inputs. I will explain you in detail.

We have one SAP CI running on cluster & one application server. The CI is ABAP only, while application server is ABAP+JAVA.

In our ESS portal, the WebAS for our Travel Module is given as R3-application server.

Now, when I have installed webdispatcher on my SAProuter machine, the SAProuter trace shows below error:

[Thr 2560] *** ERROR => Could not connect to SAP Message Server at ciCEP. URL=/msgserver/text/logon?version=1.2 [icrxx.c 2634]

[Thr 2560] *** ERROR => rc=-1, HTTP response code: 503 [icrxx.c 2635]

[Thr 2560] *** ERROR => see also OSS note 552286 [icrxx.c 2636]

Please advice on this.

Regards,

Ashish Khanduri

[nelis]

Thr 2560 *** ERROR => Could not connect to SAP Message Server at ciCEP. URL=/msgserver/text/logon?version=1.2 http://icrxx.c 2634
Thr 2560 *** ERROR => rc=-1, HTTP response code: 503 http://icrxx.c 2635
Thr 2560 *** ERROR => see also OSS note 552286 http://icrxx.c 2636

By default your SAP system message server does not use HTTP, you need to configure it to listen on an HTTP port using ms/server_port_<xx> parameter which webdispatcher uses for communication. Have you done this ? Please read the [documentation|http://help.sap.com/saphelp_erp60_sp/helpdata/EN/42/5cfd3b0e59774ee10000000a114084/frameset.htm] for further information, especially the section "Parameterization of the SAP Web Dispatcher".

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Nelis

[Former Member]

Hi Ashish,

The SAP Router and SAP Web Dispatcher on the same host should perfectly work fine as both the programs are independent of each other and they both operate on different ports.

There should not be any issue as such. But as pointed out by Nelis, please revert if you are facing any issues with error logs.

Cheers....,

Raghu

[nelis]

If yes, then what all steps are required? Please help on this. I already got some help from the below link, but not clear how to impelemnt this.
Can anyone, please explain me in detail, how to achieve this?

I don't see why this shouldn't work. You said you have already installed webdispatcher, you were also given a link to the documentation in the above thread. What exactly is the problem now ? Can you be more specific, perhaps include any errors you are getting in dev_webdisp etc

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Nelis