Just realized that some of the incoming mails where bouncing, meaning that the other mailserver wasn’t able to connect at all.
This concerned all all mailservers starting a STARTTLS SMPT connection. In the logs the “SSL routines:SSL3_GET_RECORD:wrong version number” occured.
It turned out to be a configuration problem of courier. In the default install TLS_PROTOCOL is set to TLS1. The problem dissapears when setting it to SSL23 instead.
I am about to move to git. One of the first projects is cleanup_old_files. From README:
Here is a quick’n dirty and maybe incomplete guide on howto turn a CentOS PC into an internet router. I mainly focused on network/firewall setup. Continue reading “CentOS as DSL-Router/Firewall HowTo”
Beim Betrieb von Netzwerk-Komponenten ist es wichtig jeweils die korrekte Zeit zur Verfügung zu haben. Für einige Anwendungen wie z.B. NFS und Log-Files ist dies missionskritisch.
Im Folgenden kurz die Erfahrungen bei der Konfiguration eines CentOS5-Rechners als Internet-Router wobei der NTP-Daemon als Zeitserver eingerichtet wird. Continue reading “NTP-Daemon auf CentOS-Internet-Router”
Howto deactivate the flash sandbox for locally running flash applications?
Create the following directory structure in your Windows profile directory
ApplicationData\Macromedia\Flash Player\\#Security\FlashPlayerTrust
There you can add arbitrary files with the name *.cfg . Flash player will parse them all. Inside one such file you can add multiple pathes, each path name in a new line. Path can point to directories or single SWF files. If a directory name is given the sandbox is disabled for SWF files in the whole subdirectory structure.
As an administrator there is also the possibility to set those pathes for all users of a computer. For more information see Adobe’s flashplayer security manual.