Things are not going well at the office and I believe that the network admin blocked the internet access for my particular machine. I would like to be able to prove it.
We share a (V)LAN through a small switch with my team. I’m able to ping anything and to resolve DNS names but can’t connect to any website, IMAP server or anything. When I connect to my smartphone’s internet connection sharing everything is ok. I also tried to connect to another VLAN and it worked as well. So I believe that my computer was blocked at firewall level, probably based on my Mac address. The network manager says that it is “because I use a Mac”
Now I would like to be able to prove (if my assumption is right) that the packets are blocked at the firewall level. Any idea how I could do that ?