Date: Tue, 13 Jan 2015 16:14:00 -0500 From: John Baldwin <jhb@FreeBSD.org> To: Mike Tancsa <mike@sentex.net>, Paul Thornton <prt@prt.org>, freebsd-net@freebsd.org Subject: Re: Issue with forwarding when creates new interface [was USB Tethering and forwarding] Message-ID: <54B58A98.1020402@FreeBSD.org> In-Reply-To: <54A82FA0.3090704@sentex.net> References: <1419680989.938234917.k6otv1bh@frv34.fwdcdn.com> <1420288398.485039365.so6mgquw@frv34.fwdcdn.com> <54A7FA6C.8030603@prt.org> <54A82FA0.3090704@sentex.net>
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On 1/3/15 1:06 PM, Mike Tancsa wrote:
> On 1/3/2015 9:19 AM, Paul Thornton wrote:
>> Hi,
>>
>> I can also replicate this behaviour on 10.1-RELEASE by simply creating
>> an additional vlan interface. It affects IPv4 and IPv6 forwarding.
>
> Strange, I dont see that on RELENG_10
>
> 0{marble}# ifconfig em2 up
> 0{marble}# ifconfig em2.3 create 1.1.1.2/24
> 0{marble}# sysctl -a | grep forwarding
> net.inet.ip.forwarding: 1
> net.inet.ip.fastforwarding: 0
> net.inet6.ip6.forwarding: 0
> 0{marble}# ifconfig vlan4 create 2.2.2.2 vlan 4 vlandev em2
> 0{marble}# sysctl -a | grep forwarding
> net.inet.ip.forwarding: 1
> net.inet.ip.fastforwarding: 0
> net.inet6.ip6.forwarding: 0
> 0{marble}#
>
> do you set forwarding via just /etc/sysctl.conf or in /etc/rc.conf via
> ipv6_gateway_enable and gateway_enable. I seem to recall some discussion
> about there being a difference. Perhaps devd is calling something that
> then fiddles with the setting ignoring whats in sysctl.conf ?
Yes, devd is running /etc/rc.d/netif start <foo> which probably checks
gateway_enable and sets the sysctl based on that overriding what it in
sysctl.conf. Just set gateway_enable=YES in rc.conf instead.
--
John Baldwin
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