aecioneto wrote: > I am not a Telefónica fan, but I also had noticed that worldwide dsl > addresses are being incorrectly related as dynamic - like SORBS does.
Actually, SORBS does not do that in general. Most business DSL blocks that are correctly separated from dynamic blocks aren't listed by SORBS. Take my network for example. One of our branch offices is static IPed via a business cablemodem service. Their IP is in the 24/8 block with all the other cable IPs. The RDNS lookup of the IP is a standard ##-##-##-##.city.cableisp.net, and yet SORBS does not list their IP because it's within a designated business IP range that the ISP has reported to SORBS as reserved for static connections. See the difference? If they would really provide quality, they would know that my IP is not dynamic instead of listing a whole range. Yes, but as I said before, that is not practical for SORBS. You can't create a database of the entire IP space and mark them off as static and dynamic one at a time. You have to do listings like this based on blocks of IPs or the database becomes too large. This is where BR Telefonica's random placement of IPs becomes problematic. Even if SORBS doesn't want to list your IP, they are faced with only three options: 1) list the entire space 2) list none of the space at all 3) generate a huge database that can handle ip-by-ip listings. 3 isn't practical because the hardware requirements. SORBS has to be a real-time query, and if every query has to search a database with 4 billion individual IP entries in it, it's going to be slow. Since the block of IPs is a mixture of both static and dynamic IPs, and most IPs in the block are in fact dynamic, the most practical thing to do is go with majority rule. > This is stupid and dsl address is not synonimous of dynamic. Agreed, and SORBS does not, and never has made that synonym. I hate to be so blunt, but you're leaping to conclusions without understanding the situation. Unfortunately BR Telefonica has not made it possible for the outside world to distinguish the difference within their network in a practical manner. That problem is strictly a problem with BR Telefonica. Not SORBS, not the rest of the world. The problem lies at the other end of your phone line within your own country. It's a problem with your ISP refusing to separate the two kinds of service, thus the outside world cannot in any efficient way treat the two kinds differently. We must treat them all the same because they're all mixed together. > > At least, I am glad to know that Matt could understand my pain with an open > mind. You're welcome. Now you also need to understand our pain on the other end and stop blaming SORBS. Mailserver operators need to track dynamic IPs. We need to do it efficiently. Blacklisting an entire "mixed neighborhood" sucks, but when there's no pattern to the allocations and the majority are dynamic or residential end-user accounts, what do you expect?
