mtu Here's how to make your new mtu setting persistent. Log in using your administrator account and open a Terminal window. Enter the following: sudo pico /etc/ppp/ip-up Type the following two lines into the new file you just created: #!/bin/sh /sbin/ifconfig ppp0 mtu 1492 Save the file using Ctrl-O (Write Out)Wenn ich crtl-o drücke steht bei mir "Cannot open file for writing", was mach ich falsch? then exit pico using Ctrl-X. Next you must make the file you just created executable. Enter this command: sudo chmod 755 /etc/ppp/ip-up That's it. What this does is create a shell script called ip-up that readjusts your mtu on your pppoe interface. The ppp daemon which controls your pppoe connection will run, as root, any commands it finds in /etc/ppp/ip-up whenever it activates a ppp/pppoe connection. Now anytime anyone on your computer activates the adsl connection, the mtu will be set to the correct value. For the masochists, type "man pppd" in a terminal window for more info about this and other cool features of the ppp daemon.