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New Member

unable to telnet (i am at strange)

Hi Experts,

We have one incoming email server for abc.dk domain with the public IP 195.24.x.xx which is NATted to 192.168.xxx.xx . telnet to the 25 port on 195.24.x.xx is not happening where as it is happening on 192.168.xxx.xx .

Can somebody please suggest me what is related problem?

When i do a telnet "telnet 195.24.x.xx 25"

I get a blank screen, and after approx 25 secs i get this error:" 421 Cannot connect to SMTP server 195.24.x.xx (195.24.x.xx:25), connect error 10060"

People I am eagerly waiting for your's early helpful response.

Regards,

Naidu.

8 REPLIES
Silver

Re: unable to telnet (i am at strange)

Hello Naidu,

Where are you doing NAT ? Router or Firewall?

Can you post config of that device?

Saju

New Member

Re: unable to telnet (i am at strange)

Hi Saju,

We done the NAT on Firewall.

Please find the attached file for config and give me the early suggestion.

Regards,

Naidu.

New Member

Re: unable to telnet (i am at strange)

Hi Saju,

Please find the attached file for config and give me the early suggestion as i am in strange.

Regards,

Naidu.

Silver

Re: unable to telnet (i am at strange)

Hello Naidu,

Can you check if following NAT statements involve the NAT of the host.Here the same ip /ports is Nated to two different ip addresses.This could be issue here .

From the config :

ip nat inside source static tcp 192.168.199.20 25 195.24.4.69 25 extendable

ip nat inside source static tcp 192.168.199.20 25 195.24.4.68 25 extendable

You can consider (after checking ) removing one of the NAT statements and then check

HTH

Saju

Pls rate helpful posts

New Member

Re: unable to telnet (i am at strange)

Hi Saju,

Nice to see your reply.

I have removed the another NAT rule but no go still there is a problem.

Please suggest me.

Regards,

Naidu.

Silver

Re: unable to telnet (i am at strange)

Did you clear NAT translations after that?

Clear ip nat translations *

New Member

Re: unable to telnet (i am at strange)

Hi Saju,

I have cleared more times but no go.

Regards,

Naidu.

Silver

Re: unable to telnet (i am at strange)

Can you let us know the private ip address that is in question here? pls post the latest config .

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