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To open a port by using iptables you can use the iptables command, assume for example that you want to open port 25, you have to issue on the shell the following command iptables -I INPUT -p tcp –dport 25 -j ACCEPT where -I instruct to not add the rulle after the deny all rule [...]
Filed under: Linux, System Administration | Tagged: CentOS, Firewalls, Iptables, Linux | Leave a Comment »
This is a useful link on how to secure ssh using for example client certificate authentication. http://wiki.centos.org/HowTos/Network/SecuringSSH
Filed under: Linux, System Administration | Tagged: Authentication, CentOS, Clients, SSH, Unix | 2 Comments »
Trying to use the standard java distribution from Oracle (….Sun was acquired from Oracle…) could be a little confusing so I just link another blog were you find described the adopted solution for CentOS 5.2 but that is applyable also to CentOS 5.5. http://chrisschuld.com/2008/10/installing-sun-java-on-centos-5-2/
Filed under: Java, Java, Programming | Tagged: CentOS, Java, JDK, Linux | 1 Comment »
It was a messy to try to export the display to a remote host. Typically it is just matter to use command like xauth <hostname> and set the DISPLAY environment variable properly or better to use ssh forwarding. On Putty and TeraTerm we need just to enable a check instead from a linux shell you [...]
Filed under: Linux, System Administration | Tagged: CentOS, Linux, X11 | Leave a Comment »
