I am on a network where our Firewall is controlled by the IT in France. We have zero access to it other than it's a PC box (checkpoint) sitting in our server room. We have a 5Mbps internet connection that randomly slows down. Sometimes it is something on our network; maybe multiple someone's watching videos. Lately we think it's our firewall. We are locked out from even running tracert, ping or pathping outside of our network.
We have had random slowness lately on random sites on random machines. When we run speed tests we are getting our 5Mbps that we should be getting so it's not our ISP and it's not likely someone inside. The likely culprit is that firewall.
I want to accomplish two things. I want to figure out if it's our firewall.
Also I want to be able to run wireshark on the network and see ALL traffic and not just the traffic to my port.
We have unmanaged switches. If we can't use our firewall is the only way to do this is to put an unswitched hub between the modem gateway and our network and then run a cable from that hub to a laptop with wireshark? Will this work? What other ways can we accomplish this? Can you use wireshark on managed switches successfully or do you only see traffic on the one mirrored port?