MySQL: SSL Vs SSH Tunnel Vs VPN
Oct 2, 2007
I need to set-up a MySQL connection between two busy Linux servers in different countries.
I understand my options are:
- Use MySQL's built-in SSL support, but I will need to open another port.
- Use an SSH tunnel, but I am not sure if this is suitable for a MySQL busy connection.
- Use a VPN, but that might be overkill.
ATM I'm leaning towards an SSH tunnel so I don't have to open another port, but I am not sure how well an SSH tunnel is suited for a busy MySQL server. In theory all 3 options do the same task, but I am not sure what the real-world performance of each method is.
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Jun 17, 2009
i want to create a vps for tunnel ip for some user that use socks proxy.
how can i do it ?
our os is Centos
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Oct 6, 2009
I have a vps at VPSVille, which I use for tunneling out onto the internet (behind a nazi firewall). Unfortunately, my vps keeps getting disabled because I cross the "20GB of traffic per month" allowed to any vps for tunneling - even though I have 300 GBs of bandwidth.
I'm now looking for another cheap vps host ($20/mo or less) that will let me utilize all the bandwidth I paid for.
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Jun 26, 2008
I'm doing the following to create an SSH tunnel:
Code:
ssh -fNg -L 8888:127.0.0.1:3306 user@123.456.789.0
How can sort of "undo" that? I ask because I need to re-tunnel in to a different IP address but right now the only way I can figure to do it is to restart my computer (which is lame).
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Nov 20, 2008
I'm currently at Uni and can't play any online games, or access various online services, due to the restrictive network (apparently "open ports" are evil )
I'm looking at setting up a HTTP tunnel (SSH is blocked) which can allow me to:
1) Get any connections from one of my games routed (over HTTP) to:
2) my VPS, which then forwards this traffic onto the game's servers
My VPS runs on Linux (CentOS 5), my current computer runs off Windows Vista.
I know there are services out there that can provide this for a low monthly fee, but I'd be happier to maintain this myself.
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Mar 11, 2013
Some of websites like youtube and facebook are blocked in my country and we can't access them .in addition most of tunneling protocols like PPTP are blocked too . I want to create a website that tunnels between our network and this website like proxy or other ways. Scripts like phpProxy are not secure and many websites don't permit the visitors who come with this scripts. A very good sample for my idea is walww.com . This websites is like alternate for blocked addresses like facebook, but it's premium and require charging cash .
How can I create website like walww.com . I have my own VPS and Host for this issue. Is that possible to serve this blocked websites trough proxy by configuring apache settings?
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Dec 29, 2007
way to create a VPN tunnel between two ubuntu servers?
Both will be in seperate datacentres but I'd like a secure tunnel so I can setup jobs to backup to one another.
This has to be done on the server level and cannot be done at the router/firewall as I do not have access to this kit.
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May 8, 2009
Since my /var partition is full, so I moved /var/lib/mysql to /backup/mysql/.
Seems all the files are copied and I changed my.cnf reboot mysql, but all the web sites using db is not working anymore..
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Jan 21, 2007
I installed the MySQL binary packages in /usr/local/mysql/ after removing the MySQL RPM package. MySQL is functioning when I executed /usr/local/mysql/bin/safe_mysqld. I reinstalled MySQL before I installed PHP. When I used a PHP script to access a MySQL database, it outputs an error:
Code:
Warning: mysqli::mysqli() [function.mysqli-mysqli]: (HY000/2002): can't connect to local mysql server through socket /var/lib/mysql/mysql.sock in index.php on line 2
However, I installed MySQL in /usr/local/mysql, not in /var/lib/mysql. How do I fix MySQL?
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Jun 16, 2008
For some reason mysql wont start, i have tried restarting mysql but it wont, it says FAILED. The mysql.sock file seems to have disappeared and i cannot find it anywhere.
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Feb 11, 2008
I recently had a harddrive failure and luckliy I can still access certain directories on this failed drive. I can still access the /var/lib/mysql/ directory which holds all the users databases and have backed all these up separately using tar.
Now what I need to know is how do you restore these database files to another server? I tried simply untar'ing one of these to the new servers /var/lib/mysql/ direcotry and it stuffed Mysql up - it went offline. I had to get a cpanel tech to bring Mysql back online.
how can I get these database files to fully work on a new server?
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Jan 17, 2008
Can someone recommended me some one with knowledge of mysql exploit or mysql injection, it seem to our VB forum have issue with database load..
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Jan 15, 2007
I've been racking my brains with this problem for the last couple of months and have made zero progress. I've asked a lot of people if they know what might be wrong here, but none of them have any idea.
Basically, the problem is that any sort of service monitor I put on my server shows MySQL as being down/offline, even when I know for sure it's up and running perfectly fine. All other services report a green light.
The mysqld service is running on port 3306, which is open both inbound and outbound on my APF config, so as far as I can tell it's nothing to do with the firewall (I won't rule that out though).
The other odd thing is that MySQL shows a green light within WHM, but not anywhere else.
Does anyone know what might be wrong here? Am I missing something entirely fundamental and obvious?
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Apr 15, 2009
my /var partition is full,
im not sure if any files i can remove to get more free space on /var partition.
because there are more free space on /home,
i think if i can move all the /var/lib/mysql to /home/mysql,
if yes,howcan i move it and do any change,
can let the sql data do not lose,
andrun well in the feature ?
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Mar 28, 2007
I've rented a dedicated server that comes with Red Hat Enterprise Linux 4 and MySQL 3.23 but I need at least MySQL 4.1 or higher. My knowledge about GNU/Linux is very limited, so I've read some documents at mysql.com and now I think I have to follow these steps:
1. Uninstall MySQL 3.23 with this command line:
shell> rpm -e mysql-*.rpm
2. Install the server and client RPMs of MySQL 5.0:
shell> rpm -i MySQL-server-VERSION.i386.rpm
shell> rpm -i MySQL-client-VERSION.i386.rpm
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Jun 13, 2007
I have a number of web sites on a dedicated server. Some of these web sites are a few years old. Are there any issues upgrading from MySQL 4.1 to 5.x? Are there web sites that may have compatibility issues?
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Dec 18, 2007
I keep getting this error :
MySQL Error : MySQL server has gone away
How do I fix it?
my.cnf contents
Quote:
[mysqld]
safe-show-database
old_passwords
back_log = 75
skip-innodb
max_connections = 800
key_buffer = 48M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 3000
thread_cache_size = 128
wait_timeout = 90
connect_timeout = 30
tmp_table_size = 128M
max_heap_table_size = 64M
max_allowed_packet = 256M
net_buffer_length = 16384
max_connect_errors = 10
thread_concurrency = 4
read_rnd_buffer_size = 786432
bulk_insert_buffer_size = 8M
query_cache_limit = 3M
query_cache_size = 48M
query_cache_type = 1
query_prealloc_size = 262144
query_alloc_block_size = 65536
transaction_alloc_block_size = 8192
transaction_prealloc_size = 4096
default-storage-engine = MyISAM
max_user_connections = 500
[mysqld_safe]
nice = -5
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
[mysqlhotcopy]
interactive-timeout
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Jun 27, 2009
I have recently upgraded mysql server from 5.0.75 to 5.1.31 on my Ubuntu server 9.04 32 bit. After that when I am running phpmyadmin it is printing a warning :
Your PHP MySQL library version 5.0.75 differs from your MySQL server version 5.1.31.
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Jun 3, 2008
I'm trying to upgrade from MySQL 4 to MySQL 5 for performance reasons. MySQL 4 was working great so I decided to just go ahead and upgrade to MySQL 5 via CPanel. The upgrade appeared to go fine however I now get this error when trying to start MySQL.
/usr/bin/mysqladmin: connect to server at 'localhost' failed error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)' Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists! mysql has failed, please contact the sysadmin (result was "Warning, no valid mysql.sock file found.mysql has failed").
I went ahead and did a forced re-install of MySQL 5, but that didn't help. Apache has been updated as well since then, but that did no good, and the MySQL process isn't starting at all.
Its CENTOS with PHP5.
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Jun 21, 2007
I am not sure what difference between --with-mysql and --with-mysql=/usr to compile php 4.4.7
because I get error message when I use --with-mysql=/usr
the error message is like Mysql header can not be found or similar thing.
it ok when I use --with-mysql
so, I am afraid that can I use php and mysql without problem by using --with-mysql?
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Jan 20, 2007
I'd like to upgrade my current mysql 4.1 version to mysl 5, but i can't find a good tutorial or explenation! I've been searching for hours now without any good results.
I've downloaded the lastest stable mysql 5 .rpm, and tried to install it with rpm -i mysql.version.rpm, but it says the following:
# rpm -i MySQL-server-standard-5.0.27-0.rhel4.i386.rpm
warning: MySQL-server-standard-5.0.27-0.rhel4.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
error: Failed dependencies:
MySQL conflicts with mysql-4.1.20-1.RHEL4.1.i386
MySQL-server conflicts with mysql-server-4.1.20-1.RHEL4.1.i386
I guess that means i have to uninstall mysql 4.1 first.
ok...
# rpm -e mysql-server-4.1.20-1.RHEL4.1.i386
warning: /var/log/mysqld.log saved as /var/log/mysqld.log.rpmsave
Let's try to install it now.
# rpm -i MySQL-server-standard-5.0.27-0.rhel4.i386.rpm
warning: MySQL-server-standard-5.0.27-0.rhel4.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
error: Failed dependencies:
MySQL conflicts with mysql-4.1.20-1.RHEL4.1.i386
Ok, let's remove that.
# rpm -e mysql-4.1.20-1.RHEL4.1.i386
error: Failed dependencies:
libmysqlclient.so.14 is needed by (installed) perl-DBD-MySQL-2.9004-3.1.i386
libmysqlclient.so.14 is needed by (installed) dovecot-0.99.11-4.EL4.i386
libmysqlclient.so.14 is needed by (installed) php-mysql-4.3.9-3.22.i386
libmysqlclient.so.14(libmysqlclient_14) is needed by (installed) dovecot-0.99.11-4.EL4.i386
libmysqlclient.so.14(libmysqlclient_14) is needed by (installed) php-mysql-4.3.9-3.22.i386
mysql = 4.1.20-1.RHEL4.1 is needed by (installed) mysql-devel-4.1.20-1.RHEL4.1.i386
Does upgrade work?
# rpm -Uvh MySQL-server-standard-5.0.27-0.rhel4.i386.rpm warning: MySQL-server-standard-5.0.27-0.rhel4.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
error: Failed dependencies:
libmysqlclient.so.14 is needed by (installed) perl-DBD-MySQL-2.9004-3.1.i386
libmysqlclient.so.14 is needed by (installed) dovecot-0.99.11-4.EL4.i386
libmysqlclient.so.14 is needed by (installed) php-mysql-4.3.9-3.22.i386
libmysqlclient.so.14(libmysqlclient_14) is needed by (installed) dovecot-0.99.11-4.EL4.i386
libmysqlclient.so.14(libmysqlclient_14) is needed by (installed) php-mysql-4.3.9-3.22.i386
Clearly not.
How do i upgrade mysql?
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Feb 16, 2007
I have a big issue importing 4.0 databases with mysql 5.0.27.
I did a mysqldump -pxxxxx --force --all-databases > file.sql on server with mysql 4.0
But when I tried to import the file on server with mysql 5.0, this is what I got:
ERROR 1064 (42000) at line 2: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'database' at line 1
I even tried to force import and I got:
ERROR 1046 (3D000) at line x: No database selected for every database.
I checked sql file and CREATE DATABASE xx and USE xx were both added.
I tried this with a single database and worked but with all not
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Jun 1, 2007
loading a phpinfo() shows that the mysql variable "Client API version" on my server doesn't match the version of mysql installed ( 4.0.20 when mysql version is 4.1.21).
Can this cause trouble and php or mysql errors on scripts i'm running?
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Nov 28, 2008
What are the files in this directory - /var/lib/mysql/
Files like
#sql_2a6c_0.MYD
#sql_2a6c_2.MYD
etc
etc
I have a stack of them all 200MB plus in size
I need to cleanup /var as its 99% full, what else can I clean up?
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Nov 28, 2008
MySQL 5.1 GA
Has anyone tried to migrate already?
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Apr 15, 2008
Mysql usage is very high now and most time server load is high.
Where is issue and how can resolve this?
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Oct 22, 2008
I'm trying to understand, generally, on a Hybrid VPS with 1gig guaranteed/4gig burst- for small sites that might be installing stuff like Wordpress, a Forum, Joomla!, etc., how many MySQL databases this system can support.
I realize traffic would be a major factor but for discussion sake lets assume an average of 50 users for each db with a peak of 100 users.
Just trying to get a 'rule of thumb'. Wondering also, how much RAM (resources?) an idle db consumes.
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Feb 25, 2008
i've been using 4.1 without problems but now i'm switching servers and i am wondering whether its a good idea to go for ver 5. How do they compare in terms of performance/security etc? Whats recommended for web use?
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Sep 13, 2008
My Server using more MYSQL and CPU
i checked every thing
1 ) i went to : Show MySQL Processes
i want to know what is NULL
root localhost NULL Query 0 NULL SHOW PROCESSLIST
2 ) i went to CPU/Memory/MySQL Usage
Top Process %CPU 122 gzip
Top Process %CPU 110 gzip
Top Process %CPU 89.0 gzip
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Jul 18, 2008
Would enabling PDO and PDO Mysql modules in apache compile (via whm) be a bad idea? Any possible conflicts or warnings?
It says
(UNSUPPORTED EXPERIMENTAL) Includes SQLite support. Other drivers (freetds, oracle, etc) can be installed with PECL. If you use rawopts to add them during compile then you will have to have them '=shared' and *NOT* do the PHP "versioning" option. Custom opt mods for PDO extensions should also do the "versioning" logic this one does.
I'm already using mysql 5 with mysqli
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