Problems connecting to Internet with Cisco 877 router

I have purchased a new Cisco 877 router to replace my old router on my existing connection. I have used Cisco CP Express to perform a basic configuration and Cisco Configuration Professional for further configuration.

The problem is that I cannot get a web page. My ISP confirms that my router is connected by I can't get a webpage. I tried pinging a public server by IP address in case it was a simple DNS issue but didn't get a reply to that.

Does anybody have any idea what I have missed? I am new to Cisco routers. I am attaching a configuration file in case that sheds any light on the problem.

Many thanks

David
Config-192.168.1.1.txt
infologicitAsked:
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Istvan KalmarHead of IT Security Division Commented:
Hi,,


did you tried mschap2 autherntication on dialer interface? Some ISP use it, not pap or chap
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edbedbCommented:
If the modem is seperate from the router, cycling the power of the modem should do the trick.
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infologicitAuthor Commented:
Hi ikalmar

The Cisco router does not appear to offer me the option of MSCHAP2 authentication and I have successfully connected with PAP/CHAP with my old router.
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infologicitAuthor Commented:
Thanks for your response edbedb. The modem is not seperate to the router but I have power cycled the router all the same and still no connection.
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Istvan KalmarHead of IT Security Division Commented:
ok

please show us:

show ip int brief
sh int dial 0

deb ppp authen, deb ppp neg, and show log....
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Istvan KalmarHead of IT Security Division Commented:
sorry 'sh interface ATM0.3 point-to-point' need
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Istvan KalmarHead of IT Security Division Commented:
hi,

here is an example, the supporting mschap on dialer interface:

ppp authentication ?
  chap        Challenge Handshake Authentication Protocol (CHAP)
  eap         Extensible Authentication Protocol (EAP)
  ms-chap     Microsoft Challenge Handshake Authentication Protocol (MS-CHAP)
  ms-chap-v2  Microsoft CHAP Version 2 (MS-CHAP-V2)
  pap         Password Authentication Protocol (PAP)
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Istvan KalmarHead of IT Security Division Commented:
Hi,

you forget to add dialer interface to out security zone:

int dial 2
zone-member security out-zone
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greg wardSystems EngineerCommented:
As you have  
ip tcp adjust-mss 1452 on vlan1 you might want to add
mtu 1492
and also on your dialer interface add the two commands
mtu 1492
  ip tcp adjust-mss 1452
 
Greg
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infologicitAuthor Commented:
Thanks ikalmar

I tried to type the command you recommended "int dial 2" but it responded "invalid input detected"
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infologicitAuthor Commented:
Hi Greg

Thanks for your response. Will your suggestion solve my connection problem? I have no idea what that means?
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greg wardSystems EngineerCommented:
if you dont know then i suggest you remove it
conf t
int vlan1
no ip tcp adjust-mss 1452
The commands are used if you are using pppoe and you look to have pppoa
 
Greg
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infologicitAuthor Commented:
I resolved the problem by installing the latest version of Cisco's Configuration Professional software and running through the exact same setup process again. I have no idea whether any of the accepted solutions worked as I didn't understand what any of them meant and I was prepared to make the changes without first understanding the consequences of the changes.
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