Date: Sat, 03 Jan 2015 14:19:24 +0000 From: Paul Thornton <prt@prt.org> To: freebsd-net@freebsd.org Subject: Re: Issue with forwarding when creates new interface [was USB Tethering and forwarding] Message-ID: <54A7FA6C.8030603@prt.org> In-Reply-To: <1420288398.485039365.so6mgquw@frv34.fwdcdn.com> References: <1419680989.938234917.k6otv1bh@frv34.fwdcdn.com> <1420288398.485039365.so6mgquw@frv34.fwdcdn.com>
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Hi, I can also replicate this behaviour on 10.1-RELEASE by simply creating an additional vlan interface. It affects IPv4 and IPv6 forwarding. This is taken from a test setup of FreeBSD boxes running Quagga as BGP routers - but with a default GENERIC kernel. This machine has 2x ixgbe, 4x igb and 2x bce physical interfaces, with a cloned lo1 and vlan0. [root@test1 ~]# uname -a FreeBSD test1.prtsystems.ltd.uk 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401: Tue Nov 11 21:02:49 UTC 2014 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 [root@test1 ~]# sysctl -a | grep forwarding net.inet.ip.forwarding: 1 net.inet.ip.fastforwarding: 1 net.inet6.ip6.forwarding: 1 [root@test1 ~]# ifconfig vlan1 create [root@test1 ~]# sysctl -a | grep forwarding net.inet.ip.forwarding: 0 net.inet.ip.fastforwarding: 1 net.inet6.ip6.forwarding: 0 I haven't tried using 10.0 as a router, so don't know if this crept in between 10.0 and 10.1 or 9 and 10. Paul. On 03/01/2015 13:12, wishmaster wrote: > > Hi, > > I have been seeing strange behavior of my system lately. After creating new interface the system variable net.inet.ip.forwarding becomes "0". > > E.g. manually load if_ral kernel module, then rel0 interface appears and net.inet.ip.forwarding becomes "0". > > Previously this happened when I attached smartphone with USB tethering is on. > May be this is VIMAGE-related... Any ideas? > > Below my original first post. > >> Hi, list. >> >> Server works as router for small network and some services in the jails. When I connect Android-based smartphone and attempt to use USB Tethering, the net.inet.ip.forwarding becomes 0 and I must change it to 1 every time. >> >> Is this normal behavior? >> >> FreeBSD server.local 10.1-STABLE FreeBSD 10.1-STABLE #1 r275636: Mon Dec 22 11:05:33 EET 2014 wishmaster@server.local:/usr/obj/usr/src/sys/SMS i386 >> >> Kernel has been compiled with VIMAGE >> >> >> Cheers, >> Vitaliy >>
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