[ale] Question on Routes

[Chuck Payne]

I try it, I still can't ping that ip from the outside world.

Thanks for the info.

Chuck

On Sun, Jul 29, 2012 at 5:31 AM, Mike Harrison <cluon at geeklabs.com> wrote:
> On Sat, 28 Jul 2012, Chuck Payne wrote:
>
>> Guys,
>>
>> I am going to be switching ISP soons, but until then I am going to run
>> two. I have an issue because I don't think I am doing something right.
>> I can ping the new ISP, but I can't hit the old one from the outside
>> world. I can ping it from the inside,  Here is my network
>>
>>
>> eth0 --> br0 192.168.0.2 network 255.255.255.0  192.168.0.0/24 Internal
>> eth1 --> br1 69.176.136.2 netmask 255.255.255.240 69.176.136.0/28 old ISP
>> eth2 51.190.58.229. netmask 255.255.255.248 51.190.58.224/29
>
> Once upon a time, I'd fake up such things with insane routing tables.
> Then came RIP, OSPF and BGP, but those things are not applicable to a home
> network.
>
> Linux will accept two (or more) default gateways, with weights
> and in theory that will solve some of your issues. Others are probably
> beyond your control, as routes and firewalls at a good ISP are designed
> to not let you hit them using their IP's from an outside connection.
>
> Just for fun, to make this happen, but not reccomended beyond playing, add
> routes for each ISP's assigned networks blocks to the appropriate upstream
> connections:
>
> #whois 69.176.136.2
> #
> # The following results may also be obtained via:
> #
> http://whois.arin.net/rest/nets;q=69.176.136.2?showDetails=true&showARIN=false&ext=netref2
> #
>
> NetRange:       69.176.128.0 - 69.176.159.255
> CIDR:           69.176.128.0/19
>
>
> (from memory, not tested, guessing br1?? may be eth??) ie:
>
> route add -net 69.176.128.0 netmask 255.255.224.0 gw 69.176.136.1 br1
>
> This should force the packets going to the local ISP to hit the right
> connection, and go up that stream.
>
>>
>> Here is what my routing table looks like.....
>>
>> route
>> Kernel IP routing table
>> Destination               Gateway         Genmask                Flags
>> Metric Ref    Use Iface
>> 51-190-58-224-s            *                  255.255.255.248       U
>>   0      0        0 eth2
>> 69.176.136.0             69.176.136.1    255.255.255.240       UG    0
>>     0        0 br1
>> 192.168.105.0               *                 255.255.255.0
>> U     0      0        0 br0
>> link-local                       *                 255.255.0.0
>>     U     0      0        0 eth2
>> loopback                       *                 255.0.0.0
>>    U     0      0        0 lo
>> default                     51-190-58-230-s 0.0.0.0
>> UG    0      0        0 eth2
>
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