The following article steps describe how to install APF in a OpenVZ or Virtuozzo VPS (VE)
In main server,

1. First of all, you need to define which iptables modules should be available for VEs.
Edit /etc/sysconfig/iptables-config:
IPTABLES_MODULES=”ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp”
Edit /etc/sysconfig/vz:
IPTABLES=”ipt_REJECT [...]

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Here are my suggested settings for the my.cnf file. This should work well for a VPS with 256-512MB RAM.

Code:
[mysqld]
max_connections = 400
key_buffer = 16M
myisam_sort_buffer_size = 32M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 1024
thread_cache_size = 286
interactive_timeout = 25
wait_timeout = 1000
connect_timeout = 10
max_allowed_packet = 16M
max_connect_errors = 10
query_cache_limit = 1M
query_cache_size = 16M
query_cache_type = 1
tmp_table_size = 16M
skip-innodb
[mysqld_safe]
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet [...]

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This will help but as mentioned in previous posts, with a VPS you do not have access to your kernal. That is good in some ways, because if you don’t have access to it, neither to hackers or spammers (which limits what they can do). Its bad in ways, because you lose control and if [...]

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