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Using wireshark to capture packets from a remote host

I spend a fair amount of my time debugging network and service problems on a few racks of Linux servers. Of course, they’re located in a data center (yes, just downstairs, but still not quite as comfortable as my office), and they’re all command-line only - no sense in ...

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DHCP Debugging and Handy TCPdump filters

Recently at $WORK we’ve been having some strange issues with a particular Xen VM not getting DHCP. Traditional (tail -f dhcpd.log) debugging hasn’t turned up much, other than the server is getting the DISCOVER but not sending out an OFFER. I’ve turned to packet captures to ...

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