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I have a MySQL (actually mariaDB) install that I just started replicating to another server. I want to ensure that I've setup SSL correctly. The SSL portion of SHOW SLAVE STATUS looks like:

Master_SSL_Allowed: Yes
Master_SSL_CA_File: /etc/mysql/newcerts/ca-cert.pem
Master_SSL_CA_Path: /etc/mysql/newcerts/
Master_SSL_Cert: /etc/mysql/newcerts/client-cert.pem
Master_SSL_Key: /etc/mysql/newcerts/client-key.pem
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No

Is this typical or show that replication is using SSL? Is there something else I can check to ensure it's using SSL? The slave is successfully replicating.

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3 Answers 3

up vote 4 down vote accepted

Inspect the relevant traffic with tcpdump/wireshark.

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You know, there might be a better way, but there's something to be said about literally seeing it happening. It's reassuring. +1 –  gparent Dec 21 '12 at 15:53
Agreed. TIL tcpdump. –  tubaguy50035 Dec 21 '12 at 19:22
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Make sure the slave replication account has SSL requirements on it. Just because the master support SSL, doesn't mean the account is required to use it.

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Agreed and configured that way. –  tubaguy50035 Dec 21 '12 at 20:45
Then, if the replication is actually working that should be enough, because the master wouldn't let the slave connect with SSL disabled. –  Tonin May 20 '13 at 12:20
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When the Master_SSL_Cipher line doesn't output an actual OpenSSL cipher, this is a bad sign.

The list of valid OpenSSL cipher on your platform is given by the command openssl ciphers -v If the connection to the slave is encrypted, I'd expect to find one of the listed ciphers to be present on the Master_SSL_Cipher: line.

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Well, I have it working now and there is nothing in the Master_SSL_Cipher line. I verified that it IS working with SSL using tcpdump. –  tubaguy50035 Dec 21 '12 at 19:23
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