On 4/23/14, 4:38 AM, Nikolay Denev wrote:
On Tue, Apr 22, 2014 at 5:37 PM, Harald Schmalzbauer
<h.schmalzba...@omnilan.de> wrote:
Hello,
here, http://svnweb.freebsd.org/base?view=revision&revision=248895
interface route protection was added (so the following problem arose
with 9.2).
Unfortunately, in my case, I must be able to delete these routes; not in
the default FIB, but in jail's fibs, because:
· Host is multihomed with multiple nics in different subnets.
· Jail's IP (no vnet) is from a different subnet than host's
default-router subnet – jail has no ip in the range of host's
default-router!!!
· FIB used by jail contains valid default-router.
Problem:
If iface-routes exist in jail's FIB, answer-packets take the
iface-shortcut, not trespassing the router (default gateway); hence
3way-handshake never finishes and firewall terminates (half-opened) TCP
sessions.
Workarround:
· Abuse packet filter doing some kind of route-to…
· Revert r248895, to be able to delete v4-iface-routes (inet6-routes can
be deleted without any hack)
Desired solution:
· Allow deletion of v4-iface-routes if FIB!=0.
Unfortunately my C skills don't allow me to implement this myself :-(
I can't even follow the code, I guess that was originally considered,
but possibly doesn't work bacause of a simple bug?!? I took the lazy way
and simply reverted r248895 instead of trying to understand
rtrequest1_fib(). I wish I had the time to learn…
Thanks for any help,
-Harry
Hi,
As it was suggested before as immediate workaround you can set
net.add_addr_allfibs=0 so that the interface routes are added only in
the default FIB.
yes, we made two behaviours.
Add interface routes to all active FIBS or only add them to the first
fib and let the user populate other fibs as needed.
It appears you want the second behaviour, so I suggest you use that
option and set up all your routes manually.
--Nikolay
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