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 <[email protected] > <mailto:[email protected]>>: > > > > 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 > > _____________________________________ > > 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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