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TCP SYN Packets to VMware Guests dropped

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I have VMware Fusion 6.02 running on OSX Mavericks on Macbook Pro (2011)

 

It appears that SYN packets are being dropped. I need to be able to port scan a guest VM but tools such as Nmap will be default use SYN packets for host discovery and so the host will appear offline. Conducting SYN scans results in no open ports yet a corresponding TCP Connect scan will show several are listening. I can obviously scan the host using connect scans and other host discovery techniques available in tools such as Nmap but found this limitation a rather annoying factor and would like to get to the bottom of it.

Has anyone else noticed this on their VMware guests. It appears to affect any Guest systems (Linux / Windows) I'm trying to figure out if this is an issue with the TCP/IP stack VMFusion uses or if its an issue with OSX Mavericks.

 

 

Thanks.

Ric


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