[RDD] network slowdown

Wayne Merricks waynemerricks at thevoiceasia.com
Mon Jul 20 06:01:59 EDT 2015


Oops forgot the windows hosts file name:

C:\Windows\System32\drivers\etc\hosts

Wayne Merricks
The Voice Asia

On 20/07/15 11:00, Wayne Merricks wrote:
> Hi,
>
> Lets go back a step.  What happens if you statically set your network 
> settings on a random "hanging" PC?
>
> E.g.
>
> Lets assume your current network is something like:
>
> 192.168.1.1 <-- Smoothwall gateway/dhcp/dns thingy
>
> It dishes out IPs from lets say 192.168.1.100 - 192.168.1.200
>
> In that IP it will set the gateway/dns to 192.168.1.1
>
> Lets assume our test PC is 192.168.1.101.
>
> Statically set:
>
> IP: 192.168.1.101
> Netmask: 255.255.255.0
> Gateway: 192.168.1.1
> DNS: 127.0.0.1
>
> Under linux open up /etc/hosts.  On Windows, run notepad as admin and 
> open up c:\windows\system32\drivers\etc
>
> Either Linux or Windows, this is the same.  The Format is to just add 
> a line for every IP you normally resolve:
>
> E.g.
>
> 192.168.1.10    fileserver
> 192.168.1.20    webserver
> 192.168.1.30    rivendell
>
> Save the file and quit.
>
> You will have to disconnect and reconnect your network to pick up the 
> changes (I think Windows will change when you press OK on the network 
> properties box).  Linux you can do the usual sudo ifdown eth0 && sudo 
> ifup eth0.
>
> Then try pinging fileserver etc.  It will use the local hosts file for 
> DNS so you shouldn't have any slow down unless you have mapped/mounted 
> drives that resolve with server names.
>
> If so make sure you add that server name to the hosts file.
>
>
> Finally,  I don't think this will be the case but if you have set up 
> VLANs it may be that your file wall is responsible for routing between 
> VLANs  so this could be where your problem lies.
>
>
> FYI Firewalls, pfsense.org, its brilliant.  Its BSD based but the web 
> interface is easy to understand, it can run off a USB stick and use 
> your spinning disks for web caching.  I've been using it for 5 or 6 
> years and its rock solid.  It can also do VPNs, VLANs, proxying, 
> logging, AV scanning, failover (if you have more than one box or one 
> box with more than one internet connection).
>
> Wayne Merricks
> The Voice Asia
>
> On 20/07/15 03:15, VE4PER / Andy wrote:
>> tried ipfire no success went back to smoothwall one.
>>
>> everything to auto only no gateways etc and wired network is fine as 
>> long as isp modem is on.
>>
>> turn it off and just hangs waiting for some timeout it appears.
>>
>> Also if I connect a wlan0 to a wireless router using a different isp 
>> modem  and turn both wlan0 and eth0 on doesn't know where to find 
>> inet so hangs up. would have thot OS would check both and use first 
>> one that comes back with a live and/or fastest connection automatically.
>>
>>
>>
>>
>>
>> On 15-07-19 03:08 PM, DreamStreamKicker wrote:
>>> yup, I use ipfire (studio in green zone) in a rather similar setup, 
>>> no problem at all when ISP or ISP modem is down
>>>
>>> Op 19-7-2015 om 21:57 schreef Cowboy:
>>>> On Sunday 19 July 2015 01:52:09 pm VE4PER / Andy wrote:
>>>>> gateways are assigned as first dns server to use,
>>>>   There's your hangup !
>>>>   Everything is not hung, but is waiting for a DNS time-out.
>>>>
>>>
>>> _______________________________________________
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>>
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>
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