Sap Netweaver 4.0 testdrive on linux - impossible to connect from sapgui

Question

Hi guys,
i've just finished to install the NW40 testdrive on a linux box, based on Redhat 9.0 distro (as requested by the equirements). At the end of installation, i have two boxes
One box with winxp sp1 called Darkstar with i.p. 192.168.100.1 and Subnet mask 255.255.0.0
The second box (with linux and NW40) called Darkmoon (prob. i was too bored to think a completly different name ) with i.p. 192.168.100.15 and subnet mask 255.255.0.0
The /etc/hosts file of the linux box contain these entries :
127.0.0.1     Darkmoon
192.168.100.15     Darkmoon.locadomain.ext
195.155.155.1     nw4host
The last line was taked from other posts found in SDN forum. I followed all the install steps and the db and the instances going-up very well, without any problem.
If i ping the two boxes, they reply each-others (from winxp to linux and vice-versa).
The "hostname" command in the linux box, return only "Darkmoon" as request by installation steps.
Now the problem.
On the winxp box i have installed sapgui 6.20. In it, I've created an entry with these information:
Description : Linux box
Application server : 192.168.100.15
System number : 00
When i try to connect with double clink on that entry, i have the following error :
Partner not reached (host 192.168.100.15, service sapdp00)
Component NI (Network interface)
Release 6.20
Ver 36
Return code -10
System call SO_ERROR
Error text : WSACONNREFUSED
Seems the boxes don't see between them.
Could be a hosts file problem on linux box???
Someone of u could give me some help ??
Could be very unhappy couln't use NW40 just for a little error.
Thx a lot for all your hints and suggestions
Andrea

Answer 1

Hi Gregor,
thx a lot for your interest in my problem.
The firts answer is yes, i've started the instance with the command "startsap", and the instance comes up.
I can see the processed with ps -ef .
Here the log of ifconfig :
eth0      Link encap:Ethernet  HWaddr 00:0C:29:5E:D9:84 
          inet addr:192.168.100.15  Bcast:192.168.255.255        Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4525 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:336907 (329.0 Kb)  TX bytes:168 (168.0 b)
          Interrupt:10 Base address:0x1080
lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:10 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:700 (700.0 b)  TX bytes:700 (700.0 b)
Another thing .
The command traceroute in each box works, and shows the right path.
Thx a lot for every information u would give me .
Andrea