Mailserver in DMZ unable to telnet to other network

[winanjaya]

Below is my network diagram:

Users 'All users are able to telnet to 172.16.2.6 25

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Switch

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Router 3640 (172.16.1.2)

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|----------- Mailserver in DMZ 192.168.1.9 the problem goes here (I able to ping to 172.16.2.6 but unable to telnet to 172.16.2.6 25)

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PIX (172.16.1.1)

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Outside Network

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Location B: 172.16.2.0/24

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Router 2610 (172.16.2.1)

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|---------- DNS & Gateway 172.16.2.3

|---------- Mailserver 172.16.2.6

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Switch

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Users

Please help .. thanks a lot in advance

Regards

Winanjaya

[dev_rajkumar]

Mailserver 192.168.1.9 is in the DMZ zone and usually the telnet , finger etc protocols usually will be disabled for the Systems in DMZ zone .

[winanjaya]

if I unable to telnet to mail server on location B (telnet 172.16.2.6 25) from 192.168.1.9 (in DMZ) ..how to send email to users in network B (172.16.2.0/24).. do you have any solution for doing this? ..please advise, thanks a lot in advance

Regards

Winanjaya

[dev_rajkumar]

You will be able to send email since email uses SMTP. DMZ is the network which is accessible by the public and usually it won't allow access to protocols such as telnet since it will gives to the system .

[winanjaya]

Thanks but how does it works?

I have 2 networks (A on 172.16.1.0/24 and B on 172.16.2.0/24) and they are in different location.

Location A:

All users in 172.16.1.0/24 should be able to send email to All users in 172.16.2.0/24 (B).

In Location A has mail server on 192.168.1.9 (this is in DMZ).

In Location B also has a mail server on 172.16.2.6.

now only users in location B are able to send email to users in location A.

Problem:

all users in location A are unable to reply / send email to users in location B.

What I did:

At Location A, From mail server box (192.168.1.9), I tried to ping mail server's in location B and I got replied, I thought that meant there is no problem with routing.. am I correct?..if so what happen? .

FYI, There is no any ACL in both routers in A and B.

please advise .. what should I do?? .. thanks a lot in advance.

Regards

Winanjaya