Wietse Venema Quotes

26 Wietse Venema quotes:

"As of today, the Postfix mail transport agent has almost 50,000 lines of code, comments not included."
"I want to avoid locking people into solutions that work only with Postfix. People should have a choice in what software they want to use with Postfix, be it anti-virus or otherwise."
"Most of the effort in the software business goes into the maintenance of code that already exists."
"One bug in an SMTP server can open up the whole machine for intrusion."
"Windows favors multi-threading, which means that a service is implemented by one single process."
"Coming back to the topic of computer security, the TCP Wrapper is an example of such a safety net. I wrote it when my systems were under attack by someone who appeared to walk through walls."
"For many people my software is something that you install and forget. I like to keep it that way."
"Internally, Postfix does use multi-threading, for example, for its scheduler program that hands the mail queue requests to the mail delivery agents."
"Postfix keeps running even if one Postfix process dies; Windows requires that someone restarts the service."
"However, writing software without defects is not sufficient. In my experience, it is at least as difficult to write software that is safe - that is, software that behaves reasonably under adverse conditions."
"Defect-free software does not exist."
"When I write software, I know that it will fail, either due to my own mistake, or due to some other cause."
"At the time the Sendmail program had a very poor reputation with respect to security, with four root vulnerabilities per year for two successive years."
"Lack of documentation is becoming a problem for acceptance."
"Sure, but competition is good for the user."
"The challenge with Postfix, or with any piece of software, is to update software without introducing problems."
"This will surprise some of your readers, but my primary interest is not with computer security. I am primarily interested in writing software that works as intended."
"In a previous life I wrote the software that controlled my physics experiments. That software had to deal with all kinds of possible failures in equipment. That is probably where I learned to rely on multiple safety nets inside and around my systems."
"Like all software, Qmail can survive only when it keeps up with changing requirements."
"My reply is: the software has no known bugs, therefore it has not been updated."

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