[SPAM] Limiting MX Requests

[Marcelo Batista Sarmento]

Hi,

Having a lot of trouble with spam here. When we check the DNS for MX queries, more than 95% comes from what we believe to be compromised customers machines.

Educating the customers takes time, so we are thinking about a way to limit the number of allowed MX requests  by adding some sort of throttle control on Named.

We already started to code it, but there is an internal discussion here about what should be the best entry point to intercept these MX queries (I think client.c is the best candidate).

Would like to here from you some comments on it.

Regards,


Marcelo Sarmento
Infra Estrutura - Virtua
Net Serviços de Comunicação
+55 11 2111 2918
+55 11 9267 2618 (Mobile)
msarmento at netservicos.com.br




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