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using web dispatcher for portal and BW access

We currently have SAP's Web Dispatcher installed in our DMZ, which links the outside world to our internal enterprise portal installation. This configuration works fine for portal connectivity (see sapwebdisp.pfl below). However, we have BW reports (BW report iViews and URL iViews) which are accessed via the portal.

I do not know what configuration (if any) needs to additionally be set up on the Web Dispatcher host to allow connectivity. Currently, when accessing a BW report via the portal (coming from the Web Dispatcher) the report request is immediately terminated with an error due to a DNS lookup error (as the BW server is on our internal segment).

The Web Dispatcher is aware of both the internal portal server and BW server IP address and hostname and has the appropriate access (port/firewall) to retrieve these reports. Further, the HTTPURLLOC table is maintained (see example below) on the BW server as recommended in SAP Note 750292 (help file = http://help.sap.com/saphelp_nw04s/helpdata/en/59/31ae42e0fac911e10000000a1550b0/frameset.htm)

However, I can't get BW reports to work remotely. Should Is there something else that should be added to the Web Dispatcher's configuration? Is there something that I should be doing on the iView side (ie. not hardcoding hostname / port to the query string?). Please advise. Thanks!

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sapwebdisp.pfl

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Profile generated by sapwebdisp bootstrap

  1. unique instance number

SAPSYSTEM = 0

  1. Accessibility of Message Servers

rdisp/mshost = epprd1

ms/http_port = 8101

  1. SAP Web Dispatcher Parameter

wdisp/auto_refresh = 120

wdisp/max_servers = 100

wdisp/add_clientprotocol_header = 1

wdisp/shm_attach_mode = 6

  1. configuration for default scenario (medium size)

icm/max_conn = 500

icm/max_sockets = 1024

icm/req_queue_len = 500

icm/min_threads = 10

icm/max_threads = 50

mpi/total_size_MB = 80

#maximum number of concurrent connections to one server

wdisp/HTTP/max_pooled_con = 500

wdisp/HTTPS/max_pooled_con = 500

  1. SAP Web Dispatcher Ports

icm/server_port_0 = PROT=HTTP,PORT=80

icm/server_port_1 = PROT=ROUTER,PORT=443

  1. SAP Web Dispatcher Web Administration

icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin

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HTTPURLLOC table (BW):

MANDT

SORT_KEY

PROTOCOL

APPLICATN

FOR_DOMAIN

HOST

PORT

100

10

HTTPS

/SAP/BW/BEX

Internal_host.company.COM

8443

100

20

HTTPS

/SAP/BW/BEX

webdispatcher_host.company.COM

443

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