This my blog and also other hosted websites running WordPress are target of bots trying passwords to wordpress admin and posting spam comments. I was unable to found simple plugin for comments dns blacklist, so I focused to mod-security. Continue reading
VMware vSphere cli requires many CPAN libraries. On Centos 6 I have enabled EPEL repository and installed packages:
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IPSec implementation has been changed in recent Redhat Enterprise Linux (RHEL) from ipsec tools (used in RHEL 5) to openswan in RHEL 6. Configuration using ifcfg-ipsec interfaces doesn’t works any more. Obviously, same change applies for Centos.
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Conntrack tools allows manipulating linux connection tracking table. Command conntrack is useful for deleting conntrack entries, but it is not included by default in RHEL/Centos.
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Digmia Enterprise Linux Source is repository with many interesting and actual packages for Centos (RHEL). It contais for example mysql-5.0.84-2.el5.x86_64.rpm, php-5.2.10-2.el5.x86_64.rpm, zabbix-1.8.3-2.el5.x86_64.rpm, postgresql-8.2.14-1.el5.x86_64.rpm and many more.
SIP brute force attacks against Asterisk servers are very popular. Best way to defend is to block sip by default and allow only allowed IPs to connect. But we can not use this approach in some cases. Here fail2ban can help. Continue reading