nice, no problem, i don't need crypt outside vpn, i will test and any news i will reply :) thanks guy 2014-02-19 13:20 GMT-03:00 Reindl Harald <h.reindl@thelounge.net>:
depends, for the WAN VPN is enough openVPN supports compression
# Enable compression on the VPN link # If you enable it here, you must also # enable it in the client config file comp-lzo
but keep in mind that the link between MySQL and the VPN server itself is unencrypted, so if you need end-to-end encryption for security reasons use both
however, mysql supports compression for replication native
http://dev.mysql.com/doc/refman/5.0/en/replication-options-slave.html --slave_compressed_protocol={0|1} Command-Line Format --slave_compressed_protocol Option-File Format slave_compressed_protocol System Variable Name slave_compressed_protocol Variable Scope Global Dynamic Variable Yes Permitted Values Type boolean Default OFF
If this option is set to 1, use compression for the slave/master protocol if both the slave and the master support it. The default is 0 (no compression).
Am 19.02.2014 17:16, schrieb Roberto Spadim:
nice, i will try a vpn, do you think i need ssl+ vpn or just vpn give a good security and good compression? the link is very poor (satelite with very high delay ~1 second or more)
2014-02-19 11:15 GMT-03:00 Reindl Harald <h.reindl@thelounge.net<mailto: h.reindl@thelounge.net>>:
Am 19.02.2014 14:10, schrieb Roberto Spadim: > What is better (better = more secure, and with good compression), a ssh tunnel, > or a native mariadb ssl connection between master/slave replication > mariadb servers?
both combined - any replication here is using mysql-ssl-encryption, even between VM's on the same host because they may be splitted to different hosts in case of VMotion
since i would never ever have listen MariaDB/MySQL the ssh-tunnel is mandatory in any case or better if possible OpenVPN because the encryption and HMAC-authentication of OpenVPN improves security dramatical
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have fun try to break that tunnel, you need the "ta.key" to even get any package accepted, then ca.crt and client.crt and need to break DHE-AES
and since it's easy to setup MySQL replication with SSL *inside* that tunnel it get wrapped - until today nobody on this planet can break that all at once without a rootkit on the involved machines
Tue Feb 18 22:10:15 2014 Control Channel Authentication: using '/etc/openvpn/ta.key' as a OpenVPN static key file Tue Feb 18 22:10:15 2014 Diffie-Hellman initialized with 4096 bit key Tue Feb 18 22:10:15 2014 Outgoing Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication Tue Feb 18 22:10:15 2014 Incoming Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication Tue Feb 18 21:10:27 2014 62.178.103.85:11258 < http://62.178.103.85:11258> Data Channel Encrypt: Cipher 'AES-256-CBC' initialized with 256 bit key Tue Feb 18 21:10:27 2014 62.178.103.85:11258 < http://62.178.103.85:11258> Data Channel Encrypt: Using 512 bit message hash 'SHA512' for HMAC authentication Tue Feb 18 21:10:27 2014 62.178.103.85:11258 < http://62.178.103.85:11258> Data Channel Decrypt: Cipher 'AES-256-CBC' initialized with 256 bit key Tue Feb 18 21:10:27 2014 62.178.103.85:11258 < http://62.178.103.85:11258> Data Channel Decrypt: Using 512 bit message hash 'SHA512' for HMAC authentication Tue Feb 18 21:10:27 2014 62.178.103.85:11258 < http://62.178.103.85:11258> Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 4096 bit RSA
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-- Roberto Spadim SPAEmpresarial Eng. Automação e Controle