create CSR openssl – request certificate

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Dec, 28, 2010
Angelo Schalley
Certificates, Linux, Plesk Linux, security

create CSR with the openssl-commando

1.Login as root. Go to a directory for storing the csr / ssl cert:
[root@serv]# cd /root/cert/

2.Create Private Key and CSR :
[root@serv cert]# openssl req -nodes -newkey rsa:2048 -keyout www_domain_com.key -out www_domain_com.csr

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Dec, 26, 2010
Angelo Schalley
Linux, Networking, security, vmware, Windows-Microsoft

FreeBSD

On a FreeBSD Unix system, as with other BSD Unix systems, you have a number of utilities with a base system install that can be used for listing open files, running processes, and network connections. The netstat utility is maintained as a part of the FreeBSD base system by the FreeBSD core developers, and offers exactly the sort of functionality you need to list open ports on your system.

Iptables connection tracking

Connection tracking is an essential security feature of Iptables. But, what is connection tracking?

It is the ability to maintain connection information in memory. This is new feature added in 2.4.xx Linux kernel. Eariler only commercial firewall has this feature but now it is part of Linux. It can remember connection states such as established & new connections along with protocol types, source and destination ip address. You can allow or deny access based upon state. Following are the states:

Category Archives: Linux

create CSR openssl – request certificate

list open / listening ports linux unix windows

FreeBSD

Iptables connection tracking

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