The backup of my lan connection to the ISP is a dial up. Is there a way to configure a dial up in Astaro? If no what would be the alternative to do so?
Once the serial console is enabled, you use slattach, chat, or dip (also kermit and minicom work as dialers; or cross your fingers and write the modem string directly to /dev/ttys0 using echo), and then start pppd (presuming that utility is on Astaro; I think I saw that; if it's not, you'll have to load it...)
After you putty in, you can run pppd as a detached process in Linux command-line ("Bash") by invoking a trailing ampersand (&) at the end of the command (or can you do a Ctrl-Z after you start it interactively??); then kill it once you're done transferring your file with ftp -don't forget to hang up the modem!
P.S. Here's an example of how pppd can invoke a dialer (in this case, chat; substitute the dialing command of your choice in the quotes...):
