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Exceed XDMCP sessions from a multihomed W2K network card

Posted on 2005-03-01
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Anyone know how to get Hummingbird Exceed to use a source IP address other than the windows default for the network interface?

I have multiple 'virtual' IP addresses configured on a single W2K network interface and I need to be able to pick which source address Exceed will use for the initial UDP 177 'willing to manage' query - that's not the same as setting the XDMCP display address :-)
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Question by:mikelang
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7 Comments
 
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Expert Comment

by:bbao
ID: 13432246
umm... not sure what you mean completely. are you looking for an utility that gives specific connection ports and relevant applications or processes of current TCP/UDP seesions?
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Author Comment

by:mikelang
ID: 13437763
Here's a bit more info ...

When a network application launches (Exceed in this case) and it 'binds' to a network socket, it will be allocated the windows default source IP address for that network interface - UNLESS the application specifically requests another IP address on the interface.

Most other X emulation packages allow you to specify this address but the option seems to missing in Hummingbird Exceed.

I am looking for either a MS Windows workaround or a way to configure this option within Exceed.

Cheers.
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by:bbao
ID: 13439270
basically, on XP workstation, you can use NETSTAT with -o command-line switch to display the owning process ID associated with each connection, so you can determine which IP has been used for specific seesion.

as for how to make sure a desired IP to be used by a specified application, you may use ROUTE ADD command with INTERFACE parameter explicitly added.

hope it helps,
bbao
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Author Comment

by:mikelang
ID: 13441554
"you may use ROUTE ADD command with INTERFACE parameter explicitly added"

Say interface 0x2 has two IP addresses configured 192.168.1.1 (Default) and 192.168.1.2

If I try, for example

route add 192.168.1.3 mask 255.255.255.255 192.168.1.2 IF 2

Route print actually returns

Network Destination       Netmask                  Gateway          Interface         Metric
192.168.1.3                  255.255.255.255      192.168.1.1     192.168.1.1     1

Can't see any way to do it with a single interface.

Cheers.


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bbao earned 2000 total points
ID: 13442007
sorry, i was thinking you have more than one NIC while i was replying. you are right, with a single interface, INTERFACE parameter is no help here. instead, you may use different IP as the gateway. but, the multihomed IPs should belong to different subnets, else the OS can not send the packets as what you desire.
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LVL 37

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by:bbao
ID: 13457585
that means one of the two IPs above, 192.168.1.1 and 192.168.1.2, should be changed to another subnet, 192.168.2.1 for example.
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Author Comment

by:mikelang
ID: 13467447
Yep, that works !

Many thanks bbao.
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