Hard freezes are unpleasant at best. They also prevent you from tracking the source of the problem. You speculate, based on the "familly" of applications you encounter problems with, and try to obtain some resolution. At first it was FireFox. I’ve removed it to install Galeon instead. Didn’t help. I left it at that, and…
IPTables can be tricky. The concept of chains pointing to chains pointing to chains can get complicated. However, understanding the initial flow, the initial “which chain points where”, and the general concept which can allow, later, for easier NAT, or DNAT, or even knowing where to put a single rule is important. Especially if you…
I’ve acquired a new server which is to supply services to a certain group. On most cases, I would have used PREROUTE chain in my IPTABLES on my router for prerouting, based on a rule such as this: iptables -t nat -I PREROUTING -i <external_Interface_name> -p tcp -s <Some_IP_address> –dport 80 -j DNAT –to-destination <New_server_internal_IP>:80…
I was required to utilize a transparent proxy. The general idea was to follow a diagram as the one here: The company did not want any information (http, https, ftp, whatever) to pass directly through the firewall from the internal network to the external network. If we can move it all via some sort of…
It was no fun, and I hope I will never experiance again such bad setup. Summery: IBM X306. The X306, X206 and some of the others are equipped with ServerRaid7e Sata controller. These controllers lack Linux drivers, and thus, make me a sad person. Drivers are available from IBM web site to RHEL 3 Update…
I have encountered this problem on my own personal mail server only once a while. It’s ratehr rare, and happends only when sending mail to some specific domains. My first notion was based on the claim that if it works for anywhere except for these one or two domains, the problem is with these one…
