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Trouble with 2801 router and PC only can access google 1

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mxdaniel

IS-IT--Management
Sep 22, 2007
5
MX
Hi every body i have this problem i config my Router 2801 with an ADSL bridge, all is ok. But I have only one problem in the pc connected to the interface Fa0/1 only can open some webpages like I cann't access via web to but i can ping from the pc.

Any Idea ?
Regards from Mexico.


---------------------------------

router#show run
Building configuration...

Current configuration : 1338 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
ip cef
!
!
ip name-server 200.33.146.161
vpdn enable
!
!
!
!
interface FastEthernet0/0
description ADSL WAN Interface
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
no ip mroute-cache
duplex auto
speed auto
pppoe enable
pppoe-client dial-pool-number 1
no cdp enable
!
interface FastEthernet0/1
ip address 192.168.10.253 255.255.255.0
ip nat inside
duplex auto
speed auto
!
interface Serial0/2/0
no ip address
shutdown
clock rate 2000000
!
interface Serial0/2/1
no ip address
shutdown
clock rate 2000000
!
interface Dialer1
description ADSL WAN Dialer
ip address negotiated
no ip unreachables
ip nat outside
encapsulation ppp
no ip mroute-cache
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username mxdaniel password 0 mxdan024533xx
!
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip http server
ip nat inside source list 10 interface Dialer1 overload
!
access-list 10 permit 192.168.10.0 0.0.0.255
no cdp run
!
!
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
!
scheduler allocate 20000 1000
end

router#

---------------------

PC..

----------------------------------------------------------
C:\Documents and Settings\Admin>ping Haciendo ping a [69.147.114.210] con 32 bytes de datos:

Respuesta desde 69.147.114.210: bytes=32 tiempo=78ms TTL=56
Respuesta desde 69.147.114.210: bytes=32 tiempo=82ms TTL=56
Respuesta desde 69.147.114.210: bytes=32 tiempo=83ms TTL=56
Respuesta desde 69.147.114.210: bytes=32 tiempo=79ms TTL=56

Estadísticas de ping para 69.147.114.210:
Paquetes: enviados = 4, recibidos = 4, perdidos = 0
(0% perdidos),
Tiempos aproximados de ida y vuelta en milisegundos:
Mínimo = 78ms, Máximo = 83ms, Media = 80ms

C:\Documents and Settings\Admin>ping
Haciendo ping a [64.233.169.147] con 32 bytes de datos:

Respuesta desde 64.233.169.147: bytes=32 tiempo=129ms TTL=246
Respuesta desde 64.233.169.147: bytes=32 tiempo=129ms TTL=246
Respuesta desde 64.233.169.147: bytes=32 tiempo=129ms TTL=246
Respuesta desde 64.233.169.147: bytes=32 tiempo=129ms TTL=246

Estadísticas de ping para 64.233.169.147:
Paquetes: enviados = 4, recibidos = 4, perdidos = 0
(0% perdidos),
Tiempos aproximados de ida y vuelta en milisegundos:
Mínimo = 129ms, Máximo = 129ms, Media = 129ms


----------------------------------------------------------


C:\Documents and Settings\Admin>ipconfig /all

Configuración IP de Windows

Nombre del host . . . . . . . . . : USER-31A08
Sufijo DNS principal . . . . . . :
Tipo de nodo . . . . . . . . . . .: difusión
Enrutamiento habilitado. . . . . .: No
Proxy WINS habilitado. . . . . : No

Adaptador Ethernet Conexión de área local :

Sufijo de conexión específica DNS :
Descripción. . . . . . . . . . . : Adaptador Fast Ethernet SiS 900-Based PCI
Dirección física. . . . . . . . . : 00-10-2E-1F-AD-7F
DHCP habilitado. . . . . . . . . : No
Dirección IP. . . . . . . . . . . : 192.168.10.72
Máscara de subred . . . . . . . . : 255.255.255.0
Puerta de enlace predeterminada : 192.168.10.253
Servidores DNS . . . . . . . . . .: 4.2.2.2

-----------------------------------------------------
 
router>en
router#conf t
router(config)#int di1
router(config-if)#ip tcp adjust-mss 1452
router(config-if)#exit
router(config)#int fa0/1
router(config-if)#ip mtu 1492
router(config-if)#end
router#wr

MTU for adsl/broadband needs to be 1492, rather than the default of 1500---certain webpages will never load with the fragments set that high. You could test Yahoo's mtu by doing an extended ping, in the extended settings, set the df bit to "y" (don't fragment). When the packet can no longer be sent, the MTU will be shown. But yours needs to be 1492 (tcp mss is 1452).

Burt
 
Many thanks Burt, is working fine.

Regards,
Daniel.
 
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