Not block, but we use DNS transparent proxy mechanism. We need to do this as our government request all ISP to block porn sites :-)
Regards Ibrahim On Tue, Sep 4, 2012 at 5:13 PM, Bacon Zombie <baconzom...@gmail.com> wrote: > Are you saying that you only allow your subscribers to use your DNS Servers > and block access to all other DNS Server? > > On 4 September 2012 11:07, Ibrahim <ibrah...@gmail.com> wrote: > > > Hi All, > > > > I've read old archive about blocking SMTP port (TCP port 25). In my > current > > situation we are mobile operator and use NAT for our subscribers and we > > have few spammers, a bit difficult to track it because mostly our > > subscribers are prepaid services. If we block TCP port 25, there might be > > "good" subscribers will not be able to send email. > > We are thinking to block MX queries on our DNS server, so only spammer > that > > use their own SMTP server will got affected. All DNS queries from our > > subscribers already redirected to our DNS cache servers. But seem Bind > > don't have feature to block MX query. Any best practice to block MX > query? > > > > > > Regards > > Ibrahim > > > > > > -- > ???????????????????? > > ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? > > ??????????????????????????????????????????????????????????????????????????????????? > > > BaconZombie > > LOAD "*",8,1 >
