Cisco 827 Router and ADSL

[mattKnight]

I have a cisco 827 (IOS ver 12.3(4)) which I would like to use as the router for my ADSL.

I have configured it to connect, using my adsl circuit. I can see CHAP authentication between my router and the ISP. The ISP allocates me the correct IP address (I have a static one).

From the Console, I can ping servers by IP address on the ISP (I used the ISPs DNS servers as test)

However, I can't ping from the LAN side to the web. I have a Gateway of last resort set.

I have run out of ideas, but I wonder whether my NAT setup is correct, or whether the ATM is configured right

interface ATM0
no ip address
no ip mroute-cache
no atm ilmi-keepalive
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl operating-mode auto
!
interface Dialer1
ip address negotiated
encapsulation ppp
dialer pool 1
ppp chap hostname <My Hostname>
ppp chap password 0 <My Password>

I am not sure about the PVC encapsulation - the ISP quote VC\Mux, but the CISCO offers the following

aal5autoppp Cisco AUTO PPP over AAL5 Encapsulation
aal5ciscoppp Cisco PPP over AAL5 Encapsulation
aal5mux AAL5+MUX Encapsulation
aal5nlpid AAL5+NLPID Encapsulation
aal5snap AAL5+LLC/SNAP Encapsulation

and aal5autoppp doesn't work!
Any other ideas?

Take Care

Matt
If at first you don't succeed, skydiving is not for you.

 

[mattKnight]

Its working now;

2 changes - encapsulation changed to aal5snap and I had n't configured the external interface as NAT outside

Take Care

Matt
If at first you don't succeed, skydiving is not for you.