Cisco LAN :: 1841 - Cannot Connect To Internet

Mar 31, 2013

My lease router 1841 is not going behind the Juniper Firewall. i am able to ping and telnet my Juniper firewall, but when i try to ping dns server 4.2.2.2 or any other website it gives me no reply.
 
Below is the configuration of my Router.
 
212.50.100.16 ( Juniper Firewall IP)
 
Router-1841>enPassword:Router-1841#ping 212.50.100.16
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 212.50.100.16, timeout is 2 seconds:.!!!!Success rate is 80 percent (4/5), round-trip min/avg/max =

[Code].....

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Cisco WAN :: 1841 / 2950 / Unable To Connect To The Internet?

Feb 24, 2011

I'm unable to connect to the internet?My university gave us student permission toset up a cisco lab. I hve an 1841 router and a 2950 catalyst switch in a single room. Fa0/1 is conncted to the switch using a 192.168.3.0 /24 network. DHCP is correctly assaigning ip addresses to the switch.
 
I connected the Fa0/0 port to the wall and used the following command to obtain an ip on the Fa0/0 port: ip adress dhcp. I used the following route command: ip route dhcp. That didn't work so I used the ip route 0.0.0.0 0.0.0.0 Fa0/0.When I run the sh cdp neighbors command I see a multilayer switch that show me connected to the Ga2/26 port with ip:192.168.179.254.I also see that the default vlan is 200 and the voice vlan is 800.
 
A linksys router is about to let us access the internet. I am able to ping the 192.168.179.254 address from the 1841 router.What am I missing to connect to the internet.I forgot to mention that I successfully receive an ip from the wall.  The latest ip I received was 192.168.179.100 /24.

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Cisco Switching/Routing :: Can't Connect 1841 Router To Internet ( ISP )

Jan 6, 2012

I have the following devices for our IT Test LAB
 
1. Cisco 1841 with 2 Fast Ethernet interfaces fa0/0 & fa0/1

2. Cisco 2960-S

3. Speedstream 6200 DSL Modem  ( PPOE Connection  with Static IP address)
 
I want to connect to the internet using the current DSL connection we currently have  .
  
LAPTOP  -->  SWITCH 2960 --> ROUTER 1841 ---> DSL Modem  ---> ISP
 
 Troubleshooting 1: Currently from the LAPTOP i am able to ping
 
1. Switch 2960  Vlan interfaces

2. Router 1841  fa0/0  & fa0/1
 
BUT can not Ping the DSL Modem  LAN interface IP 192.168.2.1 and can not get out to the INTERNET 
 
Troubleshooting 2:currently from the Switch 2960  i can ping
 
1. All the Vlan interfaces on the Switch 2960

2. Router  1841  fa0/0 & fa0/1 interfaces

3. Laptop A & B
 
But can NOT ping the DSL modem LAN interface IP 192.168.2.1 and can not get out to the internet
 
Troubleshooting 3:Currently from the Cisco 1841 router  i can ping
 
1. All the Vlan interfaces on the Switch 2960

2. Router 1841 fa0/0 & fa0/1

3. Laptop A & Laptop B

4. Can Get out to the internet. I am able to ping any  internet destinations without any problem

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Dec 26, 2012

I need some clarification if it is possible to do an IPL connection between Cisco 2801 (T1) to Cisco 1841 (E1) via Ethernet (2801) to Serial (1841).
 
I am unable to find any documentation about this and I need to connect our network to an offshore network.

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Feb 21, 2012

VPN 1841, and static nat. I have to create VPN to connect to remote network, but problem is that they already use same subnet as mine. How to configure static nat on cisco 1841 so static nat will work and address will be translated in different IP when connection trough VPN.
 
I have address 192.168.235.1 and I want to translate to 192.168.100.1?This 1841 is border router, and all VLNAs and VLANs routing is on 3650.

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Jan 12, 2011

I need to allow only a few Internet websites from Cisco 1841 Router for my LAN users. What Access-List should be used for this.

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Jan 26, 2013

I have got two 1841 and one 881 cisco router. I can keep any one of this router at HO and remaining at branch office.  I have got a static internet IP at HO but dynamic IP at branch office. I want to setup a VPN to connect to HO from branch office through router. The branch connects through a private IP for internet purpose. Which VPN is the most secure and best for this purpose.

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Apr 28, 2013

I have a branch office connected to the Head Office through a VPN Tunnel in cisco 1841 Router. If i enable Internet for any pc in Branch Office through cisco router i cannot access it remotely from Head Office. [code]

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Cisco WAN :: 1841 NAT - Router Cannot Host On Internet

Mar 13, 2011

I have an issue with NAT on a Cisco 1841. See following configuration,
 
interface FastEthernet0/0 description Connection to LAN bandwidth 100000 ip address 10.90.0.100 255.255.0.0 ip helper-address 10.100.2.2 ip helper-address 10.100.2.3 ip load-sharing per-packet ip nbar protocol-discovery ip nat inside ip virtual-reassembly duplex auto speed auto
 
interface Dialer1 description ADSL connection bandwidth 448 ip address X.X.X.X 255.255.255.248 ip access-group 150 in ip nat outside ip inspect firewall out ip virtual-reassembly encapsulation ppp dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap pap callin ppp chap hostname hostname ppp chap password password ppp pap sent-username hostname password password crypto map vpn
ip nat inside source list 102 interface Dialer1 overload(code )
 
I've tried this with both a source list NAT statement, and a route-map. The router can contact hosts on the Internet:
 
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 128.31.0.51, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 144/147/148 ms

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Cisco WAN :: 1841 Configure NAT For LAN User Can Go To Internet

Aug 4, 2011

As per  topology attached herewith,  i have 2 ISPs,  ISP1 and ISP2. And i have one Cisco 1841 Router with only 2 Ethernet interfaces.My Lan subnet is 192.168.1.0.My puspose is, i want to configure both ISP1 and ISP2 and my Lan Network on router, without adding any extra interaface. I  also want to configure a nat so that Lan user can go to internet. I wabt to do this using 2 Interfaces.

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Apr 6, 2011

I have configured a Cisco router. I am able to ping google from rotuer. I can ping my local IP from router and router local IP to my machine. But I can not access internet on machine. I can not ping google and any other IP out of network.

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Cisco WAN :: 1841 - No Internet Access Via LAN Clients

Apr 27, 2012

I have a Cisco 1841 router that is connected to a switch. I have WAN/LAN configured on the router and the switch is handing out internal IP's. The issus that none of the client machines can access the Internet. From within the router console, I am able to ping external domain names, my ISP DNS servers.
 
Once the client machines picks up an IP they are unable to ping any external domain names or IP's and not even the ISP DNS servers, but they can ping the Cisco router IP. As a note I have tried my ISP DNS servers and as a test Google's DNS servers, but neither will allow access to the Internet.
 
Below is the current running config:
 
Building configuration...
 
Current configuration : 1440 bytes
!
version 12.4
service timestamps debug datetime msec

[Code].....

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Aug 2, 2012

I am in trouble with my cisco 1841 configuration.The "what I want to" schema: very external IP ( AAA.AAA.AAA.AAA ) in the internet cloud => | cisco 1841 external IP BBB.BBB.BBB.BBB | => internal computer IP CCC.CCC.CCC.CCC

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Aug 1, 2012

I am in trouble with my cisco 1841 configuration. The "what I want to schema":very external IP ( AAA.AAA.AAA.AAA ) in the internet cloud => | cisco 1841 external IP BBB.BBB.BBB.BBB | => internal computer IP  CCC.CCC.CCC.CCC
 
Steps (this what I think should be done):

1. Find all packets from A by acl

2. Route finded packets throught cisco1841 directly to internal ip address
 
It should be easy but it doesn't.

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Dec 17, 2011

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Oct 31, 2012

i have router 1841 have 2 interface.i make routing between vlan  by subinterface in router and in switch trunk but vlan 5 cannot access internet

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Jun 10, 2011

I configure for our office site to site VPN project. Now I configured already  Site to site vpn between ASA 5510 and 1841 router.               

HQ LAN                              
Branch LAN   10.2.1.0/24 >>> ASA 5510>>>>> 1841 >>> INTERNET <<<<<< 1841 <<<<<< 10.30.3.0/24 ^^^^ Call Manager 2851 

Now can access from Branch LAN to HQ LAN each other. I face the problems that are 

1) In branch LAN , they can access HQ LAN & resource , but cannot access internet. I didn't configure NAT on PH Router

2)  Can I access internet from BRANCH LAN through HQ LAN to INTERNET. Or  Can I access Internet from Branch LAN from PH Router directly while  access to VPN to HQ LAN ?  

3)  In Branch Site , hard phone cannot work but soft phone on PC can call to HQ. Hard phone IP are same in Remote Network (172.16.1.0/24 ) . Is it problem ? how can I configure separately ?

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Mar 11, 2010

We have 2mbps leased line and have Cisco 1841 which is managed by our ISP. I have hooked up another 1841 (please find basic config below, it will get more complex lateron) Now when I connect my laptop I am able to browse Internet. But when I conect VOIP phone, it is not able to contact it's Hosted Server on Internet.
 
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Nov 2, 2011

I want to know is it possible to check Internet speed directly in the cisco router thru any command or activating any service in the cisco router?.As it is seen most of the times internet speed offer by ISP is different as compared to clients.and Clients most oftenly not satisfied with internet speed The problem is that our ISP has given us 100MB leaased line.But when we deployed in production network the speed is same as DSL.We have reported this issue to ISP they then carried out Iperf test by connecting laptop directly with the ISP router.They have tested the speed and it shows  about 94-96 Mbps and argu that it is up to the mark and there is problem at your side(i.e our internal network).Now our internal network has cisco 1841 router connected directly to ISP 3825 cisco router.Our router has minimum configuration as required to pass traffic out and in.Our internal 1841 router is connected to switch to which different clients are connected.We have performed some online tests using different speed checking websites and also perform real time tests by uploading and downloading files.The speed is much low as compared to 100Mbps and it is nearly or slightly higher then as DSL connection. how can we check internet speed in the specified scenario?Is there any command or service available in cisco router to check internet speed as we want to check ISP connection speed directly thru 1841 router?what about authenticity of online speed checking websites?Any specialize software/tool you recommend to check Internet speed in specified scenario?

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Feb 23, 2012

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show crypto isakmp sa
 
IPv4 Crypto ISAKMP SA
dst             src             state          conn-id status
202.x.x.x   175.x.x.x  QM_IDLE           1001 ACTIVE(code)

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FCCID - KA2DIR601A1
IC : 4216A-IR601
H/W Ver:A1
F.W Ver:1.00 NA

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