센드메일을 이용한 RBL 차단

센드메일에서 RBL를 이용해서 spam ip 막는 방법입니다..

대표로 cbl.abuseat.org 랑 국내 kisa RBL 사이트를 적용하면 그마나 스팸아이피를 차단할수가 있습니다.

설정 방법

[dolmuri@ mail] vi /etc/mail/sendmail.mc

FEATURE(`dnsbl', `cbl.abuseat.org', `550 Message from $&{client_addr} rejected as spam - see http://cbl.abuseat.org')dnl
FEATURE(dnsbl, `spamlist.or.kr', `Rejected - see http://www.kisarbl.or.kr/')dnl

[dolmuri@ mail] m4 /etc/mail/sendmail.mc  > /etc/mail/sendmail.cf

추가된 룰을 확인해본다.
[dolmuri@ mail] vi /etc/mail/sendmail.cf


## map for DNS based blacklist lookups
Kdnsbl host -T<TMP>


# DNS based IP address spam list cbl.abuseat.org
R$* $: $&{client_addr}
R$-.$-.$-.$- $: <?> $(dnsbl $4.$3.$2.$1.cbl.abuseat.org. $: OK $)
R<?>OK $: OKSOFAR
R<?>$+<TMP> $: TMPOK
R<?>$+ $#error $@ 5.7.1 $: 550 Message from $&{client_addr} rejected as spam - see http://cbl.abuseat.org

# DNS based IP address spam list spamlist.or.kr
R$* $: $&{client_addr}
R$-.$-.$-.$- $: <?> $(dnsbl $4.$3.$2.$1.spamlist.or.kr. $: OK $)
R<?>OK $: OKSOFAR
R<?>$+<TMP> $: TMPOK
R<?>$+ $#error $@ 5.7.1 $: Rejected - see http://www.kisarbl.or.kr/