Can't see network packets on loopback adatper.
Roger Doak wrote: I installed the Microsoft Loopback Adapter on my PC and I am able to use it to communicate between two applications running on the same host but I am not able to capture the Ethernet packets between the applications using Omnipeek.  I have the loopback adapter configured to 10.0.0.1.  I could communicate and capture packets when I had XP but I had to manually add the route and arp entry.  On windows 7 the route and arp entry already seem to be populated but I can't capture the traffic.  The easiest way to repeat the scenario is to ping the loopback adapter: ping 10.0.0.1.  With the default route and arp entry I get the reply but can't capture the ping request or reply.  If I delete the route I can capture the ping request but receive no reply.  When I add the route back in I still can capture the request but do not receive a reply. I think you should address this question to omnipeek as it as a problem with their packet capturing software. You could alternatively try MS Network Monitor 3.4, which is free and very good for in detail analysis of MS-specific network traffic or wireshark, which is free, too. But be aware, that the loopback adapter is not a real network adapter, so it could easily be, that it does not work with packet capturing at all. Wolfgang
October 17th, 2011 11:01pm

I installed the Microsoft Loopback Adapter on my PC and I am able to use it to communicate between two applications running on the same host but I am not able to capture the Ethernet packets between the applications using Omnipeek. I have the loopback adapter configured to 10.0.0.1. I could communicate and capture packets when I had XP but I had to manually add the route and arp entry. On windows 7 the route and arp entry already seem to be populated but I can't capture the traffic. The easiest way to repeat the scenario is to ping the loopback adapter: ping 10.0.0.1. With the default route and arp entry I get the reply but can't capture the ping request or reply. If I delete the route I can capture the ping request but receive no reply. When I add the route back in I still can capture the request but do not receive a reply.
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October 19th, 2011 3:33pm

Roger Doak wrote: I installed the Microsoft Loopback Adapter on my PC and I am able to use it to communicate between two applications running on the same host but I am not able to capture the Ethernet packets between the applications using Omnipeek.  I have the loopback adapter configured to 10.0.0.1.  I could communicate and capture packets when I had XP but I had to manually add the route and arp entry.  On windows 7 the route and arp entry already seem to be populated but I can't capture the traffic.  The easiest way to repeat the scenario is to ping the loopback adapter: ping 10.0.0.1.  With the default route and arp entry I get the reply but can't capture the ping request or reply.  If I delete the route I can capture the ping request but receive no reply.  When I add the route back in I still can capture the request but do not receive a reply. I think you should address this question to omnipeek as it as a problem with their packet capturing software. You could alternatively try MS Network Monitor 3.4, which is free and very good for in detail analysis of MS-specific network traffic or wireshark, which is free, too. But be aware, that the loopback adapter is not a real network adapter, so it could easily be, that it does not work with packet capturing at all. Wolfgang
October 19th, 2011 3:59pm

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