Cisco router 1921 internet problem with a site-to-site vpn connection

I have TE-data Modem 3com dsl connection in 2 sites. and I have 2 routers cisco 1921 and there is a vpn site-to-site between them and

the VPN connection works well. and I configured the PAT on one of them to allow users access to the internet but tere is a problem:

all users can ping a public ip address

all users can ping any URL

but there is no navigation of the internet

and it's configuration

NOZHA #sh run
Building configuration...

Current configuration: 2425 bytes
!
! Last configuration change at 11:24:08 UTC Thu Sep 20 2012
!
version 15.0
horodateurs service debug datetime msec
Log service timestamps datetime msec
no password encryption service
!
hostname NOZHA
!
boot-start-marker
boot-end-marker
!
enable secret 5
!
No aaa new-model
!
!
!
!
No ipv6 cef
IP source-route
IP cef
!
!
!
IP dhcp pool 1
network 192.168.40.0 255.255.255.0
router by default - 192.168.40.1
4.2.2.2 DNS Server 8.8.8.8
Infinite rental
!
!
IP domain name shady2012
!
Authenticated MultiLink bundle-name Panel
!
!
!
license udi pid CISCO1921/K9 sn FCZ1432C5KM
licence start-up module c1900 technology-package securityk9
!
!
!
redundancy
!
!
!
!
crypto ISAKMP policy 10
BA aes
preshared authentication
Group 2
ISAKMP crypto key shady2012 address 81.10.xxx.yy
!
!
Crypto ipsec transform-set shady2012 aes - esp esp-sha-hmac
!
card crypto 150 s2s - VPN ipsec-isakmp
the value of 81.10.xxx.yy peer
PFS group2 Set
match address s2s-vpn-Oly
!
!
!
!
!
interface GigabitEthernet0/0
MTU 1000
IP address 41.41.xx.yy 255.255.255.252
NAT outside IP
activate nat IP
IP virtual-reassembly
automatic duplex
automatic speed
s2s - VPN crypto card
!
!
interface GigabitEthernet0/1
192.168.40.1 IP address 255.255.255.0
IP nat inside
activate nat IP
IP virtual-reassembly
automatic duplex
automatic speed
!
!
default IP gateway (hop 41.41.xx.yy) next
IP forward-Protocol ND
!
no ip address of the http server
no ip http secure server
!
The dns server IP
overload of the IP nat source list mypool GigabitEthernet0/0 interface
IP route 0.0.0.0 0.0.0.0 41.41.xx.yy
IP route 192.168.20.0 255.255.255.0 (41.41.xx.yy) next hop
IP route 192.168.30.0 255.255.255.0 (41.41.xx.yy) next hop
!
mypool extended IP access list
deny ip 192.168.21.0 0.0.0.255 192.168.20.0 0.0.0.255
deny ip 192.168.21.0 0.0.0.255 192.168.30.0 0.0.0.255
deny ip 192.168.40.0 0.0.0.255 192.168.20.0 0.0.0.255
deny ip 192.168.40.0 0.0.0.255 192.168.30.0 0.0.0.255
allow an ip
s2s-vpn-Oly extended IP access list
ip permit 192.168.40.0 0.0.0.255 192.168.30.0 0.0.0.255
IP 192.168.21.0 allow 0.0.0.255 192.168.20.0 0.0.0.255
IP 192.168.30.0 allow 0.0.0.255 192.168.40.0 0.0.0.255
ip licensing 192.168.20.0 0.0.0.255 192.168.21.0 0.0.0.255
ip permit 192.168.40.0 0.0.0.255 192.168.20.0 0.0.0.255
IP 192.168.21.0 allow 0.0.0.255 192.168.30.0 0.0.0.255
!
!
!
!
!
!
!
control plan
!
!
!
Line con 0
line to 0
line vty 0 4
password
opening of session
!
Scheduler allocate 20000 1000
end

If anyone has the answer please answer ASAP

When you say can ping any URL, I am assuming that you are pinging of the FULL domain name, IE: it is resolved to an ip address, right?

If you disable the VPN, can you access the internet?

You have a proxy server or anything that could block navigation?

This error message you get on your web browser?

Also try another web browser, and none works?

Tags: Cisco Security

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