Hacker's ramblings

I business in Sydney, Australia and I'm sharing some pics I managed to snap with an iPhone. There wasn't too much time for doing any extensive touristing around, but I managed some.

So here goes:

There is a pic of The Bridge, view to harbor from top floor of one skyscraper on Victoria Street, Opera House and Manly Beach.

I got a comment from Mr. Martin, that Google changed their SMTPd, so I'll have to revisit the article.

As suggested, new /etc/postfix/smtp_reply_filter would be:

#New 2016/09:
/^5(\d\d )5(.*. \S+ - gsmtp.*)/ 4${1}4$2

Above one is working perfectly on my box.

Again, thanks for Mr. Martin for bringing this topic to my attention.

Every once in a while I have enough time to read books. The ones made out of paper having printed words and images on the paper. And pretty much 98% of the books I've read in the last couple of decades have something to do with my profession. There is one book, that's worth mentioning: Security Engineering by Ross Anderson.

The price point for getting this one is a non-issue, you can download the entire book as a PDF with no cost at http://www.cl.cam.ac.uk/~rja14/book.html (that's at University of Cambridge). Having the book available is fully intentional, as four years have passed, author and publisher have agreed to place the material freely available for anybody interested. I most sincerely thank Mr. Anderson of doing that.

Of yourse, I recommend you to support this good work and purchase one. Go to Amazon, or similar and get your own copy. It will include a digital copy, all you have to do is go to above link and download one.

I'd definitely recommend this book to anybody ever designing or implementing anything with a computer. As the phrase goes: “Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.” This is your chance of getting ahead and learning how some smart people blundered in their design and/or implementation of security. There is so much information in the book, but I found the case studies being the best part. The general idea is to get an injection of experience and start to think like hackers do.

My recommendation is that, for anybody working in software engineering should memorize this book and have an exam taken, so that it is crystal clear how secure systems are done.