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6 votes
Accepted

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 ...
Ron Trunk's user avatar
  • 67.7k
5 votes
Accepted

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.
Ron Trunk's user avatar
  • 67.7k
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 ...
Ricky's user avatar
  • 32.3k
2 votes

Wireshark not capturing packets?

I had the same issue. I was using it for the first time. As in the above answer by Ron Maupin, I didn't select an interface. When you start wireshark you see in the middle of the window a scrollable ...
jitheshKuyyalil's user avatar
1 vote
Accepted

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 ...
Abu Zaid's user avatar
  • 361
1 vote
Accepted

Fortigate 100E user names in syslog

A Fortigate uses an FSSO module (Fortinet Single Sign On) where these attributions are configured (part of Security Fabric for FortiOS 6.x). For instance, AD logins can be monitored by source IP via ...
Zac67's user avatar
  • 85.5k
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 ...
Ron Maupin's user avatar
  • 99.9k
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 ...
Zac67's user avatar
  • 85.5k
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 ...
Zac67's user avatar
  • 85.5k
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/...
Ricky's user avatar
  • 32.3k

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