On Tuesday 28 December 2004 17:39, Laurent CARON wrote: > >A home system with an email server, i.e. exim, need not lay "exposed" > > 24/7. Is there a way to write script to open a port such as SMTP/25 > > periodically for a certain amount of time, check for activity, wait till > > free and then close it. > > > >This would be a cron'ed equivalent of bringing up Guarddog or some other > >IPtables interface, enabling access, waiting a while and seeing no (or no > >more) activity, bringing it up again and disabling access. > > > > > > > > use cron and iptables for it > > Allow new connection > wait 10/15 mins > forbid new connections but still allow established ones on port 25 > > Am I wrong?
What I had in mind. I use IPTables through a UI. The man pages show me nothing clear how to do the two function cited here. Please point me in the right direction :-)
