11-29-2006 04:01 AM - edited 03-05-2019 01:05 PM
I have an cisco 831 router that is configured for high speed internet. For some reason I am not able to ping the outside ip address of the router 38.x.x.198 (times-out) even if I remove the 108 access list. I am able though to ping the nat'd ip addresses of my servers 38.x.x.42 and 38.x.x.43. Any idea
below is the config
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname MyRouter
!
boot-start-marker
boot-end-marker
!
memory-size iomem 25
enable secret 5 hidden
!
no aaa new-model
!
resource policy
!
no ip source-route
!
!
ip cef
no ip domain lookup
ip domain name nextlink.net
ip name-server x.x.x.x
ip name-server x.x.b.b
!
!
!
!
!
!
!
!
interface Ethernet0
ip address 10.0.0.1 255.0.0.0 secondary
ip address 10.10.10.1 255.0.0.0
ip nat inside
ip virtual-reassembly
no cdp enable
hold-queue 32 in
!
interface Ethernet1
ip address 38.102.x.x.255.255.252
ip access-group 108 in
ip nat outside
ip virtual-reassembly
duplex auto
no cdp enable
!
interface Ethernet2
no ip address
shutdown
!
interface FastEthernet1
duplex auto
speed auto
!
interface FastEthernet2
duplex auto
speed auto
!
interface FastEthernet3
duplex auto
speed auto
!
interface FastEthernet4
duplex auto
speed auto
!
ip route 0.0.0.0 0.0.x.x.102.194.197
no ip http server
no ip http secure-server
ip http max-connections 4
ip http timeout-policy idle 600 life 86400 requests 10000
!
ip nat pool nat-1 38.97.x.x.97.68.41 netmask 255.255.255.248
ip nat inside source list 2 pool nat-1 overload
ip nat inside source static 10.0.0.6 38.97.68.42
ip nat inside source static 10.0.0.7 38.97.68.43 extendable
!
access-list 2 permit any
access-list 108 permit icmp any any
access-list 108 permit tcp any any established
access-list 108 permit udp any eq domain any
access-list 108 permit udp any any eq domain
access-list 108 permit tcp any host 38.x.x.42 eq 4899
access-list 108 permit tcp any host 38.97.x.43 eq 4899
access-list 108 permit ip host 67.x.x.166 any
access-list 108 permit ip host 70.x.x.41 any
access-list 108 deny ip any host 38.x.x.42
access-list 108 deny ip any host 38.x.x.43
access-list 108 permit ip any any
no cdp run
!
control-plane
!
!
line con 0
exec-timeout 0 0
password 7 anotherpassword
login
no modem enable
stopbits 1
line aux 0
line vty 0 4
exec-timeout 120 0
password 7 telnetpassword
login
!
scheduler max-task-time 5000
11-29-2006 04:05 AM
from where you are trying to ping 38.102.194.198 and natted IP of servers? is it from inside LAN or from outside?
also can u put output of sh ip route from your router?
11-29-2006 09:42 AM
From outside the network and have tried from different locations.
here is the show ip routes
#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B -
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA exter
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L
ia - IS-IS inter area, * - candidate default, U - pe
o - ODR, P - periodic downloaded static route Gateway of last resort is 38.102.194.197 to network 0.0.0.0
38.0.0.0/30 is subnetted, 1 subnets
C 38.102.194.196 is directly connected, Ethernet1
C 10.0.0.0/8 is directly connected, Ethernet0
S* 0.0.0.0/0 [1/0] via 38.102.194.197
11-29-2006 04:22 AM
Hi
Where are you trying to ping from? Where is the source of the ping packets?
11-29-2006 05:23 AM
As a suggestion please do not share your actual ip addresses.
Also, if you are trying to ping this ip from outside it should work. Becuase i tried to ping it and it is working.
Pinging 38.102.194.198 with 32 bytes of data:
Reply from 38.97.68.41: bytes=32 time=246ms TTL=240
Reply from 38.97.68.41: bytes=32 time=366ms TTL=240
Reply from 38.97.68.41: bytes=32 time=411ms TTL=240
Reply from 38.97.68.41: bytes=32 time=346ms TTL=240
If you are trying from outside, please let us know what is the source ip that the packet is taking.
--Pls rate all helpful posts--
11-29-2006 09:40 AM
thanks for the suggustion.
I am trying to ping from outside. I tried from three different sites and it's time out or getting "expired in transit"
if you look at the replies you got you'll see there were not coming from e1 38.102.194.198 but insteadfrom 38.97.68.41.
Any ideas?
11-29-2006 10:38 AM
Maher,
The reason you are getting a respone from 38.97.68.41 is because of your NAT configuration.
In the NAT Configuration, you have
ip nat inside source list 2 pool nat-1 overload
access-list 2 permit any
The access-list 2 NAT's any traffic source from the router and that is why when you ping 38.102.97.198 you get a response from 38.97.68.41 the NATed ip address.
I am pretty confident that if you reconfigure the NAT Statements, you will see the router respond on the .198 IP Address.
Configure NAT with an extended access-list. For example:
ip nat inside source list 150 pool nat-1 overload
access-list 150 permit ip 10.0.0.0 0.255.255.255 any
Let me know how it goes.
Regards,
Arul
** Please rate all helpful posts **
11-30-2006 04:26 PM
THANKS SO MUCH!!!! That worked.
11-29-2006 10:22 AM
Hi.
Try the follwoing under ethernet1
no ip proxy-arp
--Pls rate all helpful posts--
11-29-2006 01:14 PM
I am still getting the time-out. I am so curious to know.
The reason why I would like e1 to be pingable because our ISP would like to monitor the Internet status consistantly and they use ICMP to do that...
any other ideas?
11-29-2006 08:02 PM
Maher,
Are you saying that you reconfigured the NAT as per my previous e mail and still having problems.
Regards,
Arul
11-30-2006 03:54 AM
Thanks Arul,
I will try it and let you know.
12-02-2006 05:10 PM
THANKS SO MUCH!!!! That worked.
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