09-24-2008 10:56 PM - edited 03-06-2019 01:35 AM
i have a Smtp Server which is connected to my 6513which ip is 10.x.x.x, core switch(6513) which in turn connected to Firewall and then to Internet Router,
in which 218.248.x.x Access is there,now my requirement is i have to nat smtp to outside ,
Could u give me the command , i am able to ping smtp from Internet router
09-25-2008 05:59 AM
Hello!
You have a sample command line below, to be able to access your smtp server from internet
ip nat inside source static tcp "internal_IP" 25 "external_IP" 25 extendable
where "internal_IP" in your case is something with 10.x.x.x and "external_IP" one IP from your public range 218.248.x.x
I hope I understood correctly your problem. Tell me if this is working for you!
Cheers,
Calin
09-25-2008 06:47 AM
Thanks Calin
ip route 218.x.x.x 255.255.255.255 Null0
and given
ip nat inside source static tcp "internal_IP" 25 "external_IP" 25 extendable
i have configured it and i couldnt ping my
218.248.x.x from Smtp 10.x.x.x,
could you advise me, my purpose is to send mails from smtp to other mails like Gmail,Yahoo
09-25-2008 07:01 AM
Hello
Where do you have this ip route 218.x.x.x 255.255.255.255 Null0 and why?!
The nat (actually is a pat) command that I wrote to you, give you the possibility to access your smtp server from the internet. This is supposed to be applied on your Internet router (I assumed that this is Cisco).
To get out on the internet from your smtp router, you need to do the following on the Internet router:
"access-list 1 permit 10.x.x.x 0.0.0.255"
then
"ip nat inside source list 1 interface Gix/y overload"
where interface Gix/y (can be FastEthernet, Serial, etc...) is your connection to the Internet.
But still that ip route to Null0...I do not see any reason for that!
Good luck!
Calin
p.s. all sample config that you have to apply on the Internet router:
"access-list 1 permit 10.x.x.x 0.0.0.255"
then
"ip nat inside source list 1 interface Gix/y overload"
"ip nat inside source static tcp 10.x.x.x 25 218.248.x.x 25 extendable
09-25-2008 07:34 AM
hai calin,
ip route 218.x.x.x 255.255.255.255 Null0 is the command on my router,
i am getting internet thru pos link
interface GigabitEthernet1/1
switchport
switchport trunk allowed vlan 202
switchport mode trunk
no ip address
channel-group 1 mode on
!
interface GigabitEthernet1/2
switchport
switchport access vlan 202
switchport mode access
no ip address
!
interface GigabitEthernet1/3
switchport
switchport access vlan 202
switchport mode access
no ip address
!
interface GigabitEthernet1/4
ip address 218.248.6.222 255.255.255.224
AND
interface POS2/2/0
description "STM1 Link to Secunderabad NIB2 Router"
ip address 210.212.218.21 255.255.255.252
ip nat outside
encapsulation ppp
clock source internal
pos framing sdh
now the Gi 1/2 and 1/3 are connected to Firewall-CoreSwitch-Smtp
and from smtp-internet router ,twoway ping is happening
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