Re: What's changing the default route?

On 2017-07-01, Claudio Jeker <cjeker@diehard.n-r-g.com> wrote:
> On Sat, Jul 01, 2017 at 04:48:05PM +0200, tonypony76@mail.com wrote:
>> I use an ssh tunnel for a VPN on OpenBSD 6.1. To initiate the VPN
>> connection, I type the following on the local machine
>>
>> # ssh -f -w 0:1 R true
>> # ifconfig tun0 10.1.1.1 10.1.1.2 netmask 255.255.255.252
>> # route add R G
>> # route change default 10.1.1.2
>>
>> where R is the IP address of the remote server, and where G is the IP
>> address of the local gateway.
>>
>> Usually, this works well. But I occasionally have a problem where the
>> default address in the routing table will spontaneously change from
>> 10.1.1.2 to G. What could be causing the routing table to spontaneously
>> change in this manner without my intervention?
>>
>
> Most probably dhclient(8).

A hackish workaround to this would be to add routes for 0.0.0.0/1
and 128.0.0.0/1 instead of changing the default route.