11-14-2003 09:40 PM - edited 03-02-2019 11:44 AM
Hi there,
I've got cisco 2620XM router.i'm configuring NAT on that. MY ISP has give us single(1) Public IP. so using that i want my user to use internet and using the same IP I want my remote user to access my mail server which is in my local LAN. How can I do that using single IP ? Please advice...
Ritesh
11-15-2003 12:50 PM
Hello,
not sure what exactly you mean: do you want the same user on your LAN to access the Internet and to access the mail server on your local LAN ? Or do you want a user on the Internet to access your mail server on your local LAN ?
Regards,
Georg
11-15-2003 06:51 PM
Yes, you can do this.
Check the last configuration on this link.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080093f31.shtml
hope this is what you were looking for.
11-16-2003 09:00 PM
Hi Georg,
In my case,My ISP has given me a Single public IP, I want my LAN user to use internet thru NATted IP on router which is given by ISP. Now i've got some remote(Sales Guys) users who r travelling very frequently. They connect internet thru Dial-up to some ISP. Now my remote user wants to access my mail server which is in LAN. So using same IP which is give by me ISP, how can I configure the same. Hope u'll get clear idea on my screnario.
RITESH
11-19-2003 12:27 PM
I think you would want to use the following command:
ip nat pool library 65.222.125.222 65.222.125.222 netmask 255.255.255.224
ip nat inside source list 10 pool library overload
Don't forget to build access-list 10 and permit your inside networks and to put ip ant outside and ip nat inside on the appropriate interfaces.
John
11-19-2003 12:58 PM
In 2620XM I am assuming fa0/0 for connecting to local LAN (private address space 192.168.0.x/24)
And Fa0/1 connecting to ISP having public IP(A.B.C.D)
Router LAN ip 192.168.0.1
Mail server IP 192.168.0.10 and port no 25(SMTP)
The config will look like this.
Inteface Fa0/1
ip address A.B.C.D
ip nat outside
Interface Fa0/0
ip address 192.168.0.1
ip nat inside
ip nat inside source list 100 interface fa0/1 overload
ip nat inside static tcp 192.168.0.10 25 interface fa0/1
ip nat inside static udp 192.168.0.10 25 interface fa0/1
ip access-list 100 permit ip 192.168.0.x 0.0.0.255 any
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