A networking problem

[Vu Pham]

On 04/26/2012 07:46 PM, Raymond Russell wrote:
> One of our remote office is serviced by cable and a VPN box.  The Cisco VPN would not work with the cable company modem.  The cable company seemed to be aware of the problem and replaced the modem with a different brand and the connection worked right away.  Maybe the modem just does like Cisco/Linksys products.

Some google results show one admin has a similar problems. He replaces 
that modem with a newer model and that fixes it. I will try some other 
options before either getting another brand of router or a newer model 
of modem.

Thanks,
Vu



>
>
>
> On Apr 26, 2012, at 6:15 PM, Lonni J Friedman wrote:
>
>> Have you verified that the cable modem has the newest firmware?
>>
>> On Thu, Apr 26, 2012 at 2:28 PM, Vu Pham<vu at sivell.com>  wrote:
>>> On 04/26/2012 01:47 PM, Sean Keating wrote:
>>>> So you have to ask what is the difference between the routers and the
>>>> linux box. Are you testing with the same cables in all situations? Are
>>>> the routers doing any firewalling or packet filtering? Can you get your
>>>> hands on another brand of router to see if there is a difference?
>>>>
>>>
>>> Sean,
>>>
>>> Turning on/off the router firewall does not help.
>>>
>>> Using another brand of router will be my last choice because I have a
>>> bunch of routers here. Unfortuantely they are all Linksys/Cisco. I may
>>> have to try a real Cisco router instead of the "home" version.
>>>
>>>
>>> Thanks,
>>>
>>> Vu
>>>
>>>
>>>> On Thu, 2012-04-26 at 07:11 -0500, Vu Pham wrote:
>>>>> I need your advice !!!
>>>>>
>>>>> Recently my home network is pretty slow when accessing the Internet .
>>>>> Contacting the ISP's support shows the problem is my Linksys (E3000)
>>>>> router. Their tests are:
>>>>> - connecting the PCs directly to the ISP cable modem ( a Motorola )
>>>>> shows the bandwidth as high as expected.
>>>>> - connecting the PCs to my router, which connects to the modem, shows
>>>>> the bandwidth is pretty low.
>>>>>
>>>>> So I got another router (E4200) to test but it shows the same pattern:
>>>>> slow with router, fast with modem only.
>>>>>
>>>>> I do not believe that both routers are bad so I install a Linux server
>>>>> that acts as a router between the Linksys router and the modem. The
>>>>> purpose is to check the packets and bandwidth from the router.
>>>>>
>>>>> Well, now all my PCs (wireless or wired) behind the Linksys router
>>>>> access the Internet as fast as when I connect them directly to the modem.
>>>>>
>>>>> How can this be ? Some kind of conflicting between the Linksys routers
>>>>> and the modem ?
>>>>>
>>>>>
>>>>> Thanks,
>>>>> Vu
>>>>> _______________________________________________
>>>>> Linux-users mailing list
>>>>> Linux-users at linux-sxs.org
>>>>> http://mailman.celestial.com/mailman/listinfo/linux-users
>>>>
>>>>
>>>
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>>
>>
>>
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> L. Friedman                                    netllama at gmail.com
>> LlamaLand                       https://netllama.linux-sxs.org
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