Re: [linux-admin] mail server di belakang firewall

[Andry Susanto]

Aris Wrote:

Tetot,
ini kan membicarakan server,
kalau ambil email dari server baru menggunakan port 110 (pop3), atau 143 
(IMAP), untuk mode ssl ada portnya sendiri.

Kalau mail server menerima email ya dari port smtp (25)

--
 Aris
 Testing sig


Saya sudah coba set iptables seperti demikian:

iptables -A PREROUTING -t nat -p tcp -d ${OUTSIDE_IP} --dport 25 -j DNAT 
--to ${SERVER_IP}:25
iptables -A FORWARD -p tcp -d ${SERVER_IP} --dport 25 -o ${INSIDE_DEVICE} -j 
ACCEPT
iptables -A POSTROUTING -t nat -p tcp -d ${SERVER_IP} --dport 25 -s 
${INSIDE_NETWORK} -j SNAT --to ${OUTSIDE_IP}

iptables -A PREROUTING -t nat -p tcp -d ${OUTSIDE_IP} --dport 110 -j DNAT 
--to ${SERVER_IP}:110
iptables -A FORWARD -p tcp -d ${SERVER_IP} --dport 110 -o ${INSIDE_DEVICE} 
-j ACCEPT

dimana : OUTSIDE_IP = IP PUBLIC
           SERVER_IP = IP INTERNAL
masalahnya:
kirim e-mail bisa, tapi terima e-mail ngga bisa. Gimana yah tracenya?
Apa ada yang kurang di iptables setting saya?
Thanks,

Andry Susanto

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