Q. I’ve recently changed email user account password using passwd command, for one my postfix email server which requires SMTP authentication before sending an email. Now following error is logged into my /var/log/maillog file: ERROR: Password not accepted from server: 535 5.7.0 Error: authentication failed: authentication failure How do I solve this problem under Red [...]
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Q. We have decided to move to Linux and brought a dedicated Dell server preinstalled with Red Hat Linux for hosting our small business website. Can you tell me what software required to run on a Linux dedicated server for hosting purpose?
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Q. My mail delivery fails with DNS: Service unavailable error. How do I fix this error under Linux / UNIX operating systems?
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Q. Can you tell me more about Linux Demilitarized Zone and Ethernet Interface Card Requirements for typical DMZ implementation? How can a rule be set to route traffic to certain machines on a DMZ for HTTP or SMTP? A. Demilitarized zone, used to secure an internal network from external access. You can use Linux firewall [...]
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Q. I’ve CentOS Linux acting as router for our small community based college. I see logwatch and other cron job generating emails for root account. How do I delete those emails? I don’t want to disable email facility but just wanted to get rid of all root emails. A. The easilst way is to empty [...]
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