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For Branch Routers, please check Comparison of Cisco Integrated Services Routers: (1800,2800,3800) vs (1900,2900,3900) vs 4000 Cisco 2960 vs 3560 Switch 2960 series switches are L2 only switches. Meaning that…
This ‘ACLs on Switches’ diagram shows PACL, VACL and RACL location and traffic direction on switch. It is clear and easy understanding. The following explanation is from Security Features on…
I have been using a Usb-to-Serial cable for many years without problem at windows xp and windows 7 system. Just recently upgraded to windows 10 , the cable does not…
I listed some of my favorite and useful Internet websites and network tools in previous post which has been used in my daily IT life. There are some network security…
I am getting the “This Connection Is Untrusted” message in Firefox for all security website using https even when I go to the Mozilla support page. Any secure site is…
Here are steps to upgrade IOS from 8.2(1) to 9.1(6) and ASDM to 7.5.2. It is simple and straightforward. By the way these steps are working for all PIX/ASA version…
Juniper SRX is a stateful firewall and allows traffic which matches an existing session. Sessions are created when a TCP SYN packet is received and it is permitted by the…
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JunOS has strong flexibility on many features. One of them is logging. It support flexible logging options. This post summarizes some concepts I learned from my work and studying. 1.Understand…
There are so many malicious websites, software and hackers in this cyber world which are aiming to get our information, hijack your computer or browsers. Even after you patched your…
Fortigate firewall 60D has been used in our environment because of performance and cost. It is small, powerful, rich feature also cost effective. Usually 60D is reliable and sitting quietly…
One of Cisco 4507R-E switch got a continuous reboot problem. It just got super engine replaced in the slot 3. During power on process, the console screen shows a rebooting…