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Category Archives: Wireshark
GNS3 WorkBench v8.6 is finally out
Executive Overview The next version of GNS3 WorkBench is out. You can download it several forms: An entire Virtual Machine as a single blob (although split into two files 2.5G-3G in size) The same Virtual Machine as individual files (in case … Continue reading
Posted in CCNA, Certifications, Cisco, dynamips, GNS3, GNS3 WorkBench, ICND1, ICND2, Labs, Mac OS X, Microsoft, Routing, Wireshark
Tagged Linux Mint, WorkBench
7 Comments
Is GNS3 going commercial? Surely Not!
I was firstly delighted, then dismayed by an email that appeared in my inbox this morning. It read: Hey GNS3, We are completely rebuilding GNS3 and want your help! In 2013, we are going to be building a brand new … Continue reading
Application Gems
Everyone has their favourite applications, and every now and then you find a gem that you wonder how you ever lived without. Here are my “gems”, I hope you find some of them as useful as I have. Some of … Continue reading
Posted in Mac OS X, Macintosh, Microsoft, Microsoft Word, opinion, SSID, VMware, wifi, Wireshark
18 Comments
Making “monitor session” work on Cisco 3750 switch
It may just be the version of IOS my customer is using, but today I came across a bug when trying to capture traffic on a Cisco Catalyst 3750 switch. The most frustrating part is that I’d seen this before, … Continue reading
Posted in Cisco, IEEE, mst, portfast, rapid spanning-tree, rapid spanning-tree, session monitor, spanning-tree, spanning-tree, Wireshark
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decoding vlan.dat
I was trying to find out where vtp transparent switches stored the vtp information that they pass on to other switches (I’m now of the opinion that they don’t – I think they simply read vtp frames, check them for … Continue reading
Posted in Cisco, perl, Wireshark
Tagged deciphering vlan.dat, decoding vlan.dat, interpreting vlan.dat, parsing vlan.dat, VLAN Trunking Protocol, Wireshark
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Broadcom NIC won’t capture in promiscuous mode
I had a bunch of Windows XP PCs with Broadcom NetXtreme Gigabit Ethernet Adapters that refused to capture (in Wireshark) traffic that had been directed to it using a monitor session command (on a Cisco switch). It would see broadcast … Continue reading
Posted in Wireshark
Tagged Broadcom, capture, Cisco Systems, Ethernet, Gigabit Ethernet, promiscuous mode, sniff, Unicast, Wireshark
Comments Off on Broadcom NIC won’t capture in promiscuous mode
