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AXISHK

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NAT on Fortigate

In my Fortiage 100D, a destination NAT is configured to map a public IP address to an internal mail server through port 25, mails can received properly.

When I try telnet [public IP of mali server] 25, there is no connection.

I suppose this should be work or SMTP connection cannot be established. If this is not established, mails can't be recevied. However, mails can pass through so far.

I try to run port scanner on the public IP of mail server, it can't scan any port except 443. In fact, port has opened for 25, 80, 143 & 110 for this server.

So, should I miss some settings in Fortigate ?

Thx
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Garry Glendown
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AXISHK

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Thx.