Lars-Johan Liman <liman@autonomica.se> writes:
I cannot agree to the "block port 25" line of action.
I am a Unix sysadmin, with 15 years of experience as sendmail and DNS expert. I have a DSL line at home, with static IP, and generic rDNS provided by my ISP. Behind it I have a serious Unix server, configured to roughly the same standard that I use at work. ... This all boils down to cost and cost model.
Yep, precisely. You're running a business/professional type of configuration on a consumer-grade circuit. Your ISP has to assume that you're Joe or Jane Luddite with an unpatched Windows PC when you buy this configuration, but your requirements are outside of the standard product definition (and best current practices) for consumer b/w. Buy an appropriate connectivity product for your home connectivity and the problems go away. Put your servers in a colo (a la http://www.vix.com/personalcolo/ ) and the problems go away. It costs more to maintain a zone file that is not created by a perl script (ie, your generic rDNS). You can expect to pay for this. Presumably as a Unix sysadmin with 15 years of experience, this is a cost you can afford/justify. ---Rob