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6 votes
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Prevent TCP sequence prediction attack

The endpoints of TCP connections are instantiated in software through a construct known as a socket. An instance of a TCP socket is defined by the source IP address, source port number, destination ...
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5 votes
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Does a PC have a MAC address table?

Unless your PC is configured as a bridge, it does not have a MAC address table. Since the PC does not forward frames from one interface to another, it has no need for a MAC table.
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2 votes

Can't ping the second network interface connected to a switch

Switch1 won't know jack about the network(s) on Switch2 unless you add an appropriate route. But as Win10 is not a router, one should not be routing foreign networks at it. (i.e. sw1's network cannot ...
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1 vote
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How to add the Hyper-V Virtual Machine to GNS 3?

The supported appliance templates can be download from the following link. https://gns3.com/marketplace/appliances For anything else, you can try to create your own template, like Kali. The one for ...
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1 vote

Can't ping the second network interface connected to a switch

Your network is a really bad design. In order to route packets between networks, you use a router. In order to bridge frames on the same network, you use a bridge (a switch is a bridge). Your PC is ...
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1 vote

Connecting industrial devices to OPC server while keeping segregation

By the way, 192.169.0.122/.123 are no private IP addresses. You should never use public addresses that you're not authorized to. Check out RFC 1918. There are two basic approaches: You configure a ...
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1 vote

Unknown DHCP problem

You should put client (access) ports in admin-edge mode. That way, they don't start in STP blocked mode but will forward right away. The default config is auto-edge which causes a notable delay ...
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1 vote

Unknown DHCP problem

Spanning-tree starts all ports as "blocking" until it can confirm no loop. The process can take up to 30s. On my 2810, without any other explicit configuration, it only takes a few seconds. I 01/01/...
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