Cisco 1720 - email not getting through

[Hermann]

I've had a Cisco router dumped on be by my ISP for our new T1. I need to set-up a routing table to pass my email traffic through, the router is running NAT. I'm in way over my head and need help. Can someone walk me through this or do I need to hire a consultant? I will also need to set-up VPN on it later.

Heres what I have so far, my ISP did this set-up:
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Gaslinger_gw
!
logging rate-limit console 10 except errors
enable secret 5 *************************
enable password *********
!
memory-size iomem 25
ip subnet-zero
no ip finger
ip name-server 129.250.35.250
ip name-server 129.250.35.251
!
no ip dhcp-client network-discovery
!
!
!
interface FastEthernet0
ip address 10.0.0.10 255.255.255.0
ip nat inside
speed auto
half-duplex
!
interface Serial0
ip address ###.###.###.### 255.255.255.###
ip nat outside
!
ip nat inside source list 7 interface Serial0 overload
ip nat inside source static tcp 10.0.0.2 110 ***.***.***.*** 110 extendable
ip nat inside source static tcp 10.0.0.2 80 ***.***.***.*** 80 extendable
ip nat inside source static tcp 10.0.0.2 25 ***.***.***.*** 25 extendable
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
no ip http server
!
access-list 7 permit 10.0.0.0 0.0.0.255
banner motd ^Cotd'

Email doesn't pass through yet. Can you tell what is wrong? (I will learn Cisco eventually but for now I need to get this working!)

Thanks - Hermann

 

[CTR]

This page at Cisco.com might help.

There are at least a dozen people on this forum who could tell you exactly what to type. But you will get more out of the experience if you go figure it out yourself. Post back if you have a specific problem, or ignore me and let someone figure it out for you. 🙂

 

[Hermann]

Is there a document somewhere that would give me a basic overview of the Cisco commands. Would be nice to understand some of the basic structure / layering.

Hermann

 

[Hermann]

Bump

 

[Zach]

I've never even looked at this stuff before but it looks to me like all the standard services are port forwarded to one system, and you may have to use that system as your mail/web server internal to the router. Wild guess. BTW: 110 is the port for POP3 (getting email), 25 is SMTP (sending), and 80 is http.

ip nat inside source list 7 interface Serial0 overload
ip nat inside source static tcp 10.0.0.2 110 ***.***.***.*** 110 extendable
ip nat inside source static tcp 10.0.0.2 80 ***.***.***.*** 80 extendable
ip nat inside source static tcp 10.0.0.2 25 ***.***.***.*** 25 extendable
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
no ip http server

 

[CTR]

Zach is on the right track. Is ***.***.***.*** listed as the MX record for your domain?

 

[Ladi]

Just remember, ? is your friend. You can type it anywhere to get help on what commands are available. Aside from that, it's probably worth the $50 or so to pick up a generic CCNA book. You *could* find 'cisco for dummies' types of books, but no reason not to learn all of it while you're at it -- and you might be able to get your company to pay for your CCNA / training 🙂

~Ladi

 

[Hermann]

Correct, the ip in the router is assigned to our in our mx record for the email. Come to find out the ISP gave us a used block of IP's, the second set even. Hopefully that will clear up the problems. the http access doesn't seam to work. We wren't sure about the "extendable" part. Is that ok?

Recommend any good books? Just looking for the basics. (I'm an architect, self-trained computer administrator, and trying to start a woodworking business. Don't really want to get too much deeper in the computer world.)

Thanks - Hermann

 

[CTR]

With 12.x IOS, the extendable command won't hurt anything. But you don't need it in your situation.