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SMTP over NAT from DMZ to public

helhea
Level 1
Level 1

Hello,

I have some questions about SMTP over NAT. I have a case where I´m using redundant Cisco 2911 routers and I want to configure NAT for outgoing traffic from DMZ to public.

These addresses are only from main router:
Interface G0/0 (public side) I have an address 10.192.a.252 mask 255.255.255.0
Interface G0/2 (DMZ side) I have an address 172.192.a.252 mask 255.255.255.0

 

I have an email-application inside the DMZ which tries to send some rapports a few times per day to clients SMTP server.
This application is located in the computer which have an ip address 172.192.a.8
Clients SMTP server is located on a public side with IP address 130.10.a.b.

My client gave me an ip address which is trusted for their SMTP server. This address is 157.45.a.125.
I´m wondering how this NAT rule should be written on my access-list that I can NAT ip address from 172.192.a.8 to 157.44.a.125? Of course using SMTP port 25.

 


Thanks in advance

 

2 Replies 2

ktonev
Cisco Employee
Cisco Employee

Hi helhea,

Please post your question in the main Routing forum as the ISR2911 is not considered a Small Business appliance.

Thank you!

Hi,

 

OK, let´s see if I found right forum.

 

thanks