Cisco Press is what I'm using also.. Very good book imho... I think what
you may be talking about with your set ip porthandler command is a feature (
I know this from working with ACC routers ) call port mapping.. You can
translate your internal IP addresses to your IP address on your external
interface (with the registered IP on it) this being P.A.T and also map a
port from that external interface to an internal ip address... so if you
map port 25 of your internal servers address to your external interfaces
registered address you can send email to that registered address and it will
actually be routed to your internal servers port 25...
I'm not positive about this with Cisco but I know it can be done on
ACC/Erickson routers because thats how I have my network setup right now.
Also if you have any good BCRAN study notes feel free to send them to
[EMAIL PROTECTED] I don't have any yet except the books.
Thanks
Cory
-----Original Message-----
From: Ajiemher [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 24, 2000 10:30 AM
To: [EMAIL PROTECTED]
Subject: RE: Cisco 761M connecting to ISP using public ip
Hello,
Thanks to those who responded.
When i checked CCO, it says that PAT is capable only of one to many
translation unlike NAT which is capable of one to one
translation aside from one to many. One interesting command under Cisco 700
router is the set ip pat porthandler which provides access to server in your
internal lan. I'm not sure whether this is the answer to my question....
If i use public ip address on my internal lan, i believe i can use the set
ip filter command to allow only SMTP data to come into my internal lan in
and block the rest. Do i make sense???
Any one has done this kind of config , your insight is really appreciated...
_Switch_
WWW ------- Cisco761M-----|_______|----- Exchange Server 5.5(Private or
Public IP Address)
|
|
workstations ( Private
or Public IP addresses)
Cory, I'm also preparing for the BCRAN exam and i find BCRAN of C.P
interesting....Good luck to us....
itsme,
Ajie of Dubai
CCNA,MCP
----- Original Message -----
From: Stull, Cory <[EMAIL PROTECTED]>
To: Larry Averitt <[EMAIL PROTECTED]>; Ajiemher
<[EMAIL PROTECTED]>
Sent: Wednesday, May 24, 2000 5:26 PM
Subject: RE: Cisco 761M connecting to ISP using public ip
> Larry,
>
> Are you sure about the static translations thing on the 761?? I looked
up
> the 761 command glossary on CCO and it looked like all it would do is
PAT...
> I'm just asking because I'm just now starting studies for BCRAN and
> configuring a 700 series router is part of that.
>
> thanks
> Cory
>
> -----Original Message-----
> From: Larry Averitt [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, May 23, 2000 2:43 PM
> To: Ajiemher; [EMAIL PROTECTED]
> Subject: Re: Cisco 761M connecting to ISP using public ip
>
>
> hello ajiemher,
> If you read the rules of this mailing list, one of the things NOT to do
> is start a message with "one of my customers"..
> but
> I would use the registered ip's and let him be. If you want to use
> pat, thats great, just use static translations for his exchange server.
> http://www.cisco.com/warp/customer/701/60.html
> good luck,
> larry
>
>
> On 24 May 00, at 0:39, Ajiemher wrote:
>
> > Hello,
> >
> > One customer of ours will be using cisco 761M router to connect to the
> > internet. They have a registered domain name and a set of public ip
> > address. They also plan of having their own mail server using Exchange
> > Server 5.5. My questions are as follows:
> >
> > 1. What is the best approach to this solution? Should i use PAT or just
> > use public address to all host in the private network? 2. If i use PAT,
> > how will i let my exchange server receive and send mail if its ip
address
> > is a private one? Is there a way to
> > map private ip address to public ip addres under cisco 700 series
> > router?
> > 3. If i use public ip address to the hosts in the network including the
> > exchange server, how will I secure the network from outside
> > world? The SET IP FILTER command for cisco 700 series router in the
> > cisco web site is not clear enough for me.
> >
> > I have no problem with exchange server since i've have done such work of
> > connecting exchange server to the internet. This is my first work that
> > involves cisco router.
> >
> > I will appreciate any help from you guys....
> >
> > Thanks in advance...
> >
> > itsme,
> >
> > Ajie of Dubai
> > CCNA
> >
> >
>
>
> Larry Averitt, CCNA
> Design Validation
> www.imcnetworks.com
>
> ___________________________________
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