[mdlug] dual homed and dual default routes?

[Wojtak, Greg]

After editing sysctl.conf, running sysctl -p will make the changes active.
Echoing the values into the appropriate files in /proc will have the same
effect.  

Also note that having more than one default gateway on a system can have
expected results.  A default gateway, as the name implies is a catchall.
Based on your setup, you should have two gateways defined: one to point at
your internal network (looks like 10.10.1.0/24) and your default gateway
should be the directroute.eda. entry from your routing table.  So something
like this:

Destination    Gateway         Genmask         Flags Metric Ref    Use Iface
host-130-16-128 alpine11        255.255.255.255 UGH   0      0        0 eth1
10.10.1.0       directroute.eda 255.255.255.255 UGH   0      0        0 eth0
192.9.70.0      *               255.255.255.0   U     0      0        0 eth1
10.10.1.0       *               255.255.255.0   U     0      0        0 eth0
169.254.0.0     *               255.255.0.0     U     0      0        0 eth1
10.10.1.0       alpine11        255.255.255.0   UG    0      0        0 eth1
default         directroute.eda 0.0.0.0         UG    0      0        0 eth0

The other thing to consider is that you do not even need a router for your
internal network if your entire internal network is flat (on the same
subnet).

Greg


On 2/8/08 9:48 AM, "Raymond McLaughlin" <driveray at ameritech.net> wrote:

> Rich Clark wrote:
>> On Fri, 8 Feb 2008, Dean Durant wrote:
>> 
>>> Hello, I am trying to create a dual homed machine, that routes packets,
>>> & runs squid.
> 
>>> SNIP> 
> 
>> Do you have the following line in /etc/sysctl.conf?
>> 
>> net.ipv4.ip_forward=1
>> 
>> Check that first, as it's the most likely problem. If you do and it's set
>> to 0, change it to 1.
> 
> Don't you need to reboot for this to have any effect? Or atleast restart
> networking? That's my general understanding of the files under /etc/.
> 
> Isn't there a similar flag under /var, like /var/run/<something> that
> can do this on the fly?
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