Question about Cisco 881 Fast Ethernet Security Router

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Having problem internal network to connect outside but the router itself can ping the outside domain or public domain/IP. The Internal Network cannot ping the domain or cannot connect to the internet what is wrong?

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I do no .how to solve the problem blocked domain?

Posted on May 04, 2013

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1.Check whether there is ping to router from lan computers.
2. If there is no ping then check the cable b/w lan computers 7 router.
3.Else if there is ping to router, then check ur router for any ip blocks, access lists etc..
4. Turn - off the local firewall, so there also a chance of it blocking access to internet

Posted on Sep 27, 2010

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Posted on Jan 02, 2017

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1 Answer

Only one device is having internet issues


Have you checked the IP settings on your internal network. It sounds like you have 2 identical IP numbers.

May 29, 2017 | D-Link DIR-615 Wireless Router

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I can't connect through network can't connect by pinging


Can you ping your router?
If you can, log into it and see if you have any problems with it. If you have ADSL, you will see the status of the line as well as whether you are connected or not. You may have a diagnostic feature that will test the connection to your provider.

If you have lost DNS with your provider, you will not be able to ping using names, only by IP addresses.

Jul 24, 2011 | Computers & Internet

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Router ar 410, wan port is eth0 with statick ip, public, and switch port 1 is on vlan2 with pirvate ip address 192.168.18.253. how tu add default route for acces to internet eth0 is connected on shdsl...


Does the DSL router have a model number? Also for the public address, can you give me the first couple of digits. I just want to make sure it is truly a public IP address and not a class A or B private address because only an ISP can hand out public addresses.
If the IP address on eth0 is indeed private, I am guessing you have to get into the DSL router and set a static route to point to let it know about both of the the ar410 networks on each interface. Keep in mind it might not understand VLSM so when you static route in the DSL to the 192 network you will only need to specify it as 192.168.18.0 as class C default mask is 24.

Mar 01, 2011 | Allied Telesyn AT AR410 Router

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My computer can see the router and the router sees the modem but i cant get the internet to my computer


by "see" you mean it answers to ping test? if so I guess that when you ping some public IP (eg. 4.2.2.2) it does not get a ping reply... right? have you tested pinging an IP address or a internet domain. If IP address works fine but domain doesnt your problem is on DNS resolution, if both of them doesnt work seem something routing/conectivity related, try running a tracert from your PC and see how far you get on the network. If you dont pass your router then you must check its WAN configuration.

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DNS Name resolution Between private & Public network.


You do not need to configure ISP's PTR records. Instead define their DNS addresses as forwarders in the properties of DNS server under forwarders tab and flush DNS cache.

Mar 24, 2009 | Microsoft Computers & Internet

1 Answer

My website on my network open the netopia router page


You need to somehow setup the internal DNS to route all requests for the specific domain name, to your internal website.

Or, setup the netopia to allow loopback connections.

If you have a 2003 Server OS, chances are that the server is handling DNS requests, at least internally.

This tutorial has a good example of how to create domains internally:
http://www.simongibson.com/intranet/dns2003/

Just a couple of tidbits when using this approach:
You will essentially be controlling the DNS for the domain internally anyways. Meaning, any subdomains, mail exchangers etc., for the domain will have to be configured as well.

Good Luck.

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1 Answer

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When you say HQ is that outside on the wan port trying to ping the Lan port?
Sometimes the router itself will respond to a ping but will not pass ping requests thru as the internal firewall can never be fully shutoff unless you are running your cisco switch as a DMZ 
also are you connecting your other pc's to the cisco or to the 5890.
Instead of shutting off the firewall completely try enabling bridge mode and give your cisco the outside IP addy.

Apr 30, 2008 | Computers & Internet

2 Answers

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If you're within a network and try connecting to computers on it with the WAN public IP, it simply won't work - you must use the network IP. On an external Internet connection, it should connect fine to the public IP. If you have access to an external machine (remote desktop), or if you know of an FTP proxy, you can try it that way. I also believe http://www.webftp.co.uk/ a web based FTP client would act as somewhat of a proxy, you could try that with the public IP and see how you go.

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