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====== Membuat Database Spammer dengan RBLDNS ======
Kali ini kami membuat database spammer dengan rbldns yang kami jalankan pada sistem operasi Almalinux

<code>
yum install epel-release -y
yum install rbldnsd -y
</code>

Setelah dua paket tersebut terinstall selanjutnya membuat konfigurasi

<code>
mkdir /etc/rbldnsd -p
nano /etc/sysconfig/rbldnsd
</code>
isi dengan
<code>
OPTIONS="-u rbldns -p /var/run/rbldnsd.pid -f -r /etc/rbldnsd \
        -b ip_address_server \
        rbl.serveranda.net:ip4set:default,blacklist,whitelist \
        rbl.serveranda.net:dnset:domain_blacklist \
        "
</code>

kemudian pada default isi dengan
<code>
nano /etc/rbldnsd/default
</code>
isi dengan
<code>
#-------------------------------
:127.0.0.2:Open relay, see http://relays.example.com/lookup?$
# The above is a default or implicit value which is used when no value given
# for an entry.  The `$' characters will be replaced by an IP address in
# question.
127.0.0.2
# A simplest case: single IP address, with default value.
10.8.60.0/24 :127.0.0.3:Address $ is from a private IP range

# Netblock - 256 IP addresses with their own A and TXT records
224/4        Reserved multicast address
# Another netblock, with default A and explicit TXT values.
192.168  Dialup pool, see http://dialups.example.com/lookup?$ for explanations
# IP numbers may be abbreviated, the above is the same as 192.168.0.0/16
10.10    :5:This network blocked due to massive spam issues
# A value may be abbreviated as well - :5: is the same as :127.0.0.5:.
10.10.5-129     :5:Those hosts are nasty
# repeat last octet: 10.10.5.0..10.10.129.255 inclusive
!10.10.1.2
# exclusion entry
# exclusion entry
#
# The following examples are for name-based zones.
#yahoo.com   :2:This domain has no working postmaster@ address
#*.yahoo.com :2:All subdomains of example.com lacks working abuse@ address
# Simple and wildcarded entry, both will return 127.0.0.2 A record
#
# some specials
$SOA 3000 ns1.serveranda.net admin.serveranda.net 0 600 300 86400 300
# Start of authority record (TTL 3000), with serial (0) computed as
# a timestamp of data file
$NS 3000 ns1rbl.serveranda.net ns2rbl.serveranda.net
# two nameservers
</code>

Kemudian anda bisa membuat record dns pada domain ns1rbl dan ns2rbl.serveranda.net \\
dalam hal ini jika hanya memiliki 1 server saja, maka ip_address_server isinya sama
<code>
ns1rbl.serveranda.net. A ip_address_server
ns2rbl.serveranda.net. A ip_address_server
</code>

Kemudian buat NS pada rbl.serveranda.net
<code>
rbl.serveranda.net. NS ns1rbl.serveranda.net
rbl.serveranda.net. NS ns2rbl.serveranda.net
</code>

Membuat restart script
<code>
nano /etc/init.d/rbldnsd
</code>
isi dengan
<code>
#!/bin/bash
#
# chkconfig: 2345 85 15
# description: rbldnsd is a DNS server designed for dnsbls.
# processname: rbldnsd
# pidfile: /var/run/rbldnsd.pid
# source function library
. /etc/init.d/functions

prog="rbldnsd"
lockfile=/var/lock/subsys/$prog
PID_FILE=/var/run/rbldnsd.pid
[ -e /etc/sysconfig/rbldnsd ] && . /etc/sysconfig/rbldnsd
RETVAL=0
start() {
        echo -n $"Starting rbldnsd service: "
        daemon /usr/sbin/rbldnsd $OPTIONS
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && touch /var/lock/subsys/rbldnsd
}
stop() {
        echo -n $"Shutting down rbldnsd service: "
        killproc rbldnsd
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/rbldnsd
}
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  restart|reload)
        stop
        start
        RETVAL=$?
        ;;
  condrestart)
        if [ -f /var/lock/subsys/rbldnsd ]; then
            stop
            start
            RETVAL=$?
        fi
        ;;
  status)
        status -p $PID_FILE rbldnsd
        RETVAL=$?
                if [ $RETVAL -eq 3 -a -f $lockfile ] ; then
                        RETVAL=2
                fi
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart|condrestart|status}"
        exit 1
esac
exit $RETVAL
</code>

kemudian buat autostart setiap boot
<code>
chkconfig rbldnsd on
</code>
jalankan
<code>
service rbldnsd start
</code>

Demikian dan semoga bermanfaat

Referensi 
  - https://blog.dgprasetya.com/dns-build-RBL-DNS-untuk-anti-spam-based-ip-address/
  - https://linux.die.net/man/8/rbldnsd
  - https://www.surbl.org/rbldnsd-bind-freebsd
  - https://docs.farsightsecurity.com/nod-noh/nod-dnsbl-rsync-rbldnsd-howto/

<nspages linux -h1  -exclude:start -simpleList>
Layanan
