The default Firefox comes with certificates from well-known commercial CAs. My ISP is also CA and Firefox cannot verified it because the CA is not recognized. How do I force Firefox to accept my ISPs certificate?


How do I verify that my ISP or my own recursive resolvers are free from DNS cache poisoning bug that is promised full disclosure of the flaw by Dan on August 7 at the Black Hat conference? How do I test my dns server for DNS cache pollution or DNS Cache Poisoning bug?


Q. I’ve couple of Linux / Windows server hosted in remote data center? My ISP provides following option for rebooting the box: a) Graceful shutdown command b) An IPMI reboot c) A power strip Which one is the best way to reboot server and why?

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Q. I’ve only one public IP address assigned by my ISP using metro Ethernet connection. eth0 has public IP and eth1 is connected to our network switch. How do I configure Linux box to forward traffic to my web server hosted at IP address?


Q. I’m using Fedora Core Linux. Recently I changed my ISP. Now I get error as follows when I try to start PPP: PPP authorization failed Machine not authorized to use this PPP address How do I fix this problem? A. PPP is the protocol used for establishing internet links over dial-up modems, DSL connections, […]


Traffic between my home and office data center encrypted using VPN but sometime my ISP get little slow or network becomes busy. I’m using Fedora Core Linux desktop system and my system freezes for a few minutes. What optimization options should be used when mounting an exported NFS share over a slow and busy network?