My friend called me the other day and asked me to help him troubleshoot the FTP server which runs in his office LAN. The problem is that the outside FTP user is able to connect the FTP server and pass the authentication, but just can not download the files from the server. OK. It sounds … Continue reading Passive Mode Settings In FileZilla
Category: Security
Please 100% Match the Internal IP Address
This topic poped up in my mind when I was writing the article ‘A Good Document Helps You Build Site2Site VPN’. Looking back in my personal VPN toubleshooting history, the case I am going to talk is listed on top of the reasons that cause site to site VPN not to work. The most common … Continue reading Please 100% Match the Internal IP Address
A Good Document Helps You Build Site2Site VPN
Building up a site to site IPsec VPN is not a hard thing to do. But of course you have to understand the principles at first. If you already knew what the two phases of negotiations are, now you can jump directly to the next graph. Otherwise, you should start from learning some fundamental VPN … Continue reading A Good Document Helps You Build Site2Site VPN
Introduction To VSG (Cisco Virtual Security Gateway)
Cisco Virtual Security Gateway (VSG) brings security capabilities to Cisco Nexus 1000V series switches.
Fraudulent Certificates Could Allow Spoofing
Microsoft warned that COMODO issued 9 fraudulent certificates to a third party whose identity was not sufficiently validated. These fraudulent certificates could be used to spoof content, perform phishing attacks, or perform man-in-the-middle attacks against all web browser users. According to Microsoft Security Advisory, the followig web properties are affected: login.live.com mail.google.com http://www.google.com login.yahoo.com (3 … Continue reading Fraudulent Certificates Could Allow Spoofing
Jackie Chen's IT Workshop 