Web Dispatcher configured but not working

Hi,
We wish to configure SAP Web Dispatcher as a reverse proxy. For this we've installed using sapinst SAP Web Dispatcher Version 7.00.11, multithreaded, ASCII, 64 BIT Patch Level 140 which was manally updated to SAP Web Dispatcher Version 7.10.1, multithreaded, ASCII, 64 BIT Patch Level 152.
The SAP Web Dispatcher server is in DMZ whereas the Enterprise Portal servers are in the intranet.
The updated SAP Web Dispatcher is available in /sapmnt/<SID>/exe and not in a seperate directory (/usr/sap/<SID>/sapwebdisp) as per SAP note 908097. The SAP Web Dispatcher has been installed on a standalone machine with instance number 00.
I've configured the Sap Web dispatcher with the -bootstrap option. The -checkconfig option completes with 0 warning 0 errors.
The TCP ports between SAP Web Dispatcher and Enterprise Portal servers are opened in the firewall. Also, required ports 22 & 8100 are opened from my computer to the SAP Web Dispatcher Server.
Yet when I try to connect to the administrator interface with the URL http://<Web_Disp_IP>:8100/sap/wdisp/admin/default.html, I receive the following text on the browser:
Network Error (tcp_error)
A communication error occurred: "Operation timed out"
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.
Similar message is received even if the SAP Web Dispatcher is installed in a seperate directory.
Has anyone come across a similar issue?
Thanks.
Regards.
SAP Web Dispatcher Profile generated by bootstrap
Profile generated by sapwebdisp bootstrap
unique instance number
SAPSYSTEM = 00
add default directory settings
DIR_EXECUTABLE = .
DIR_INSTANCE = .
Accessibility of Message Servers
rdisp/mshost = <EP_CI_IP_address>
ms/http_port = 8104
SAP Web Dispatcher Parameter
wdisp/auto_refresh = 25
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
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
SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=8100
icm/server_port_1 =
SAP Web Dispatcher Web Administration
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin,AUTHFILE=icmauth.txt,PORT=8100
WebDisp:wdpadm 16> sapwebdisp pf=sapwebdisp.pfl -checkconfig
Checking SAP Web Dispatcher Configuration
=========================================
maximum number of sockets supported on this host: 8192
Server info will be retrieved from host: <EP_CI_IP_address>:8104 with protocol: http
Checking connection to message server...OK
Retrieving server info from message server...OK
Message Server instance list:
------++--
+
instance name
hostname
HTTP port
HTTPS port
------++--
+
J2EE37031000
sappqxx03
50300
50301
J2EE53924900
sappqxx05
50500
50501
------++--
+
Checking ABAP servers with URL "/sap/public/icman/ping":
no server group "!DIAG" defined
Checking J2EE servers with URL "/index.html":
Checking J2EE server sappqxx03:50300...OK
Checking J2EE server sappqxx05:50500...OK
Web Dispatcher configuration for J2EE only system: No server group !DIAG defined
On double stack systems, configure Web Dispatcher to accessMessage Server of SAP Web AS ABAP
Check ended with 0 errors, 0 warnings

Hi,
We wish to configure SAP Web Dispatcher (WDP) as a reverse proxy. For this we've installed using sapinst SAP Web Dispatcher Version 7.00.11, multithreaded, ASCII, 64 BIT Patch Level 140 which was manally updated to Version 7.10.1, multithreaded, ASCII, 64 BIT Patch Level 152.
The SAP WDP server is in DMZ whereas the Enterprise Portal servers are in the intranet.
The updated SAP WDP is available in /sapmnt/<SID>/exe and not in a seperate directory (/usr/sap/<SID>/sapwebdisp) as per SAP note 908097. The SAP WDP has been installed on a standalone machine with instance number 00.
I've configured the Sap WDP with the -bootstrap option. The -checkconfig option completes with 0 warning 0 errors.
The TCP ports between SAP WDP and Enterprise Portal 7.0 SP14 servers are opened in the firewall confirmed as per note 552286. Also, required ports 22 & 8100 are opened from my computer to the SAP WDP Server.
Yet when I try to connect to the administrator interface with the URL http://<Web_Disp_IP>:8100/sap/wdisp/admin/default.html, I receive the following text on the browser:
Network Error (tcp_error)
A communication error occurred: "Operation timed out"
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.
Similar message is received even if the SAP WDP is installed in a seperate directory.
Has anyone come across a similar issue?
Thanks.
Regards.
SAP Web Dispatcher Profile generated by bootstrap
SAPSYSTEM = 00
DIR_EXECUTABLE = .
DIR_INSTANCE = .
rdisp/mshost = <EP_CI_IP_address>
ms/http_port = 8104
wdisp/auto_refresh = 25
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
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
wdisp/HTTP/max_pooled_con = 500
wdisp/HTTPS/max_pooled_con = 500
icm/server_port_0 = PROT=HTTP,PORT=8100
icm/server_port_1 =
icm/HTTP/admin_0 = PREFIX=/sap/wdisp/admin,DOCROOT=./admin,AUTHFILE=icmauth.txt,PORT=8100
Brief output of checkconfig
Maximum number of sockets supported on this host 8192
Server info will be retrieved from host EPHostIPAddres 8104 protocol http
Checking J2EE server sappqxx03:50300...OK
Checking J2EE server sappqxx05:50500...OK
Web Dispatcher configuration for J2EE only system: No server group DIAG defined
Check ended with 0 errors, 0 warnings

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1)Our srm server is connected to portal and end-users are using portal to connect to it. Srm server has another 2 other application server for load balancing.
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