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http://haris.tv/2007/04/24/admin-ssl-new-wordpress-plugin/
A WordPress plugin that encrypts the admin interface traffic over SSL to increase site security.
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http://pajhome.org.uk/crypt/md5/
A javascript implementation of md5. Very handy.
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http://serverfault.com/questions/399487/cant-connect-to-mysql-using-self-signed-ssl-certificate
This one question contains much of the necessary wisdom around mysql and SSL certificates. Incredibly helpful.
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http://tombuntu.com/index.php/2007/12/12/simple-file-encryption-with-openssl/
Handy howto on encrypting files with openssl and a passphrase. Dead easy, `openssl aes-256-cbc -salt -in file -out file` then `openssl aes-256-cbc -d in file out file`. Can also be used in pipes like `tar cp /blah | openssl aes-256-cbc -salt -out b.tar``
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http://www.hanselman.com/blog/SomeTroubleWithWildcardSSLCertificatesFireFoxAndRFC2818.aspx
Helpful article that explains some SSL errors with wildcard certificates which according to RFC2818 only go one level deep. So *.blah.com is good for foo.blah.com but not bar.foo.blah.com. Weird.
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http://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4
Good introduction on setting up mysql replication with SSL encryption. Some of the options have changed in mysql 5.5 (no moremaster-connect-retry) and some settings are not applicable to Ubuntu, but the gist of it is useful.
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http://www.margi.marnet.net.mk/CA/certexport-mf.html
Converting pk12 / p12 files into pem files using openssl. `openssl pkcs12 -nocerts -in mycertificate.p12 -out ~user/.globus/userkey.pem` and `openssl pkcs12 -clcerts -nokeys -in mycertificate.p12 -out usercert.pem`
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http://www.startssl.com/
Free SSL certificates which are accepted by most modern browsers. Very cool.
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http://www.stunnel.org/
Stunnel is an SSL wrapper or proxy which can encrypt any TCP traffic on Unix / Linux and Windows. It can be used to encrypt any TCP transaction (http, smtp, pop3, imap, etc).
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http://www.win.tue.nl/hashclash/rogue-ca/
Fascinating paper on hacking SSL due to weaknesses in the md5 algorithm.
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https://forums.aws.amazon.com/thread.jspa?messageID=250673
Very helpful thread that explains a simple one-line fix to curl problems with the PHP AWS SDK on Ubuntu 8.04 (slice1).
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https://support.mozilla.org/en-US/questions/786035#answer-142961
How to get an SSL client certificate into Firefox on Android. Copy cert9.db and key4.db from phone's SD card Androiddataorg.mozilla.firefoxfilesmozillaprofile.default to dir. Then `pk12util -i file.p12 -d sql:dir`
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https://www.sslshopper.com/ssl-checker.html
A very useful SSL check utility which will support non standard port numbers. Useful for monit debugging on port 2812.