Discuss mailing list

[Jeff Taylor <shdwdrgn AT sourpuss.net>]

I just have a simple at-home rig, so I couldn't afford anything cool
like BGP.  I made do with what I have though...

I make use of a custom DNS setup.  Any queries coming in on my DSL are
given IP addresses for the DSL line.  Any queries from the Cable are
given Cable IPs.  In reality both sets of IPs point to the same servers,
however there is some load-balancing performed by round-robin due to the
dns queries.

The advantage lies in when one connection goes offline.  If my DSL goes
down, then all dns queries will only resolve through the Cable
connection... so requests for my domains are automatically routed
through whichever connection is available.  I use a 60-second timeout,
which requires more frequent lookups, but it also means that all
incoming traffic should be rerouted around an outage within a minute. 
Its not BGP, but it works pretty good.


On 02/23/2013 12:34 AM, kennytaylor AT runbox.com wrote:
> Load balancing inbound traffic is the trick.  The right way to do it is BGP 
> routing, which requires expensive address blocks and cooperative ISPs.  
> That way you own a set of addresses and advertise that set to both ISPs.  
> Pricey and hard to get.
>
> At the day job, we use an appliance called Fatpipe Warp.  I'm not a big fan 
> of proprietary stuff, but it takes a neat approach.  It has three WAN 
> interfaces and acts as the DNS server for the domain.  When a client does 
> the DNS lookup for "www.domain.com", the query goes to both WAN IP 
> addreses.  The DNS response has a very small TTL--10 seconds I think--and 
> replies with only the IP addresses of the WAN interfaces that are in an UP 
> state.  It only works for applications accessed with a hostname, and TCP 
> sessions break when a WAN link goes down.  But it's a neat trick:)
>
> Kenny
>
> ----- Start Original Message -----
> Sent: Fri, 22 Feb 2013 20:53:02 -0700
> From: Jeff Taylor <shdwdrgn AT sourpuss.net>
> To: discuss AT lists.opennicproject.org
> Subject: Re: [opennic-discuss] Hosting Tier-2 DNS server
>
>> I use shorewall for my firewall.  You can add in a program called LSM
>> which will monitor and manage multiple internet connections.  It takes a
>> bit to set it up, as there is no good documentation on it, but once you
>> have it working it is great.  When both of my connections are online,
>> outgoing traffic uses round-robin between them.  If one of the
>> connections fails, LSM will do failover in a matter of seconds.
>>
>>
>> On 02/21/2013 02:13 AM, Lenny Guy wrote:
>>> 3) I have, but I don't know how to do rolling
>>>
>>
>>
>> --------
>> You are a member of the OpenNIC Discuss list. 
>> You may unsubscribe by emailing 
>> discuss-unsubscribe AT lists.opennicproject.org
> ----- End Original Message -----
>
>
> --------
> You are a member of the OpenNIC Discuss list. 
> You may unsubscribe by emailing discuss-unsubscribe AT lists.opennicproject.org