Date: Wed, 17 Dec 2014 15:53:35 -0500 From: Allan Jude <allanjude@freebsd.org> To: freebsd-jail@freebsd.org Subject: Re: only lo0 interface inside jail, no default gw Message-ID: <5491ED4F.4040002@freebsd.org> In-Reply-To: <0096d1968fd2758df224a9dea6934ddb@gritton.org> References: <CABk4_A61y1m8hXXkOPEKSbzf74j64MNtYhfV59enVuJfPwQApQ@mail.gmail.com> <0096d1968fd2758df224a9dea6934ddb@gritton.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --pKOE5KDC1QecrgJooAu6x8nA49jNDPw3G Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 2014-12-17 15:48, James Gritton wrote: > On 2014-12-16 10:35, Alexander Lunev wrote: >> Hello everyone. >> >> I'm trying to build jail environment on a new server with 10.1-R. I've= >> did >> that before on 9.2-R, but now i'm stuck with strange network problem: = no >> matter how i configure jail (old way through rc.conf jail_* variables = or >> via /etc/jail.conf), i don't see default gateway in jail's routing tab= le. >> At first i started with more complex config using separate fib for jai= l, >> but it's not working even without fibs (or in fib 0). So, here's what = i >> have in the host system: >> >> # netstat -rn >> Routing tables >> >> Internet: >> Destination Gateway Flags Netif Expire >> default 10.1.1.1 UGS em0.4 >> 10.1.1.0/24 link#4 U em0.4 >> 10.1.1.205 link#4 UHS lo0 >> 10.1.1.206 link#4 UHS lo0 >> 127.0.0.1 link#3 UH lo0 >> 127.0.0.2 link#3 UH lo0 >> >> # ifconfig >> em0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu= 1500 >> >> options=3D4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4= ,WOL_MAGIC,VLAN_HWTSO> >> >> ether 00:30:48:c1:e1:b4 >> nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 >> options=3D600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6> >> inet6 ::1 prefixlen 128 >> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 >> inet 127.0.0.1 netmask 0xff000000 >> inet 127.0.0.2 netmask 0xff000000 >> nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL> >> em0.4: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 m= tu >> 1500 >> options=3D103<RXCSUM,TXCSUM,TSO4> >> ether 00:30:48:c1:e1:b4 >> inet 10.1.1.205 netmask 0xffffff00 broadcast 10.1.1.255 >> inet 10.1.1.206 netmask 0xffffff00 broadcast 10.1.1.255 >> nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> vlan: 4 parent interface: em0 >> >> I can ping internet from a host via gateway 10.1.1.1 >> >> And here's what i have in jail: >> >> =3D=3D=3D=3D=3D=3D BOF /etc/jail.conf =3D=3D=3D=3D=3D=3D=3D=3D=3D >> exec.start =3D "/bin/sh /etc/rc"; >> exec.stop =3D "/bin/sh /etc/rc.shutdown"; >> mount.devfs; >> allow.raw_sockets; >> path =3D "/usr/jails/$name"; >> >> template { >> jid =3D 1; >> ip4.addr =3D "em0.4|10.1.1.206/24"; >> ip4.addr +=3D "lo0|127.0.0.2/8"; >> host.hostname =3D template; >> } >> =3D=3D=3D=3D=3D=3D EOF /etc/jail.conf =3D=3D=3D=3D=3D=3D=3D=3D=3D >> >> # jexec 1 netstat -rn >> Routing tables >> >> Internet: >> Destination Gateway Flags Netif Expire >> 10.1.1.206 link#4 UHS lo0 >> 127.0.0.2 link#3 UH lo0 >> >> I can ping gateway from jail >> >> # jexec 1 ping 10.1.1.1 >> PING 10.1.1.1 (10.1.1.1): 56 data bytes >> 64 bytes from 10.1.1.1: icmp_seq=3D0 ttl=3D64 time=3D0.366 ms >> ^C >> >> But not the Internet or anything via routing. >> >> I have no default gateway in jail - why? What have i missed in this ne= w >> jail implementation since 9.2-R? >=20 > The netstat output is no surprise. I don't know if it was before or > after 9.2, but jails don't see routes that don't involve their own IP > addresses, and that includes the default route. >=20 > But that doesn't mean the default route isn't there. I have netstat > output similar to yours, but packets still route as expected. I don't > see anything in your jail.conf that looks wrong, so I'm afraid I can't > say anything more than "it looks like it *should* work." >=20 > - Jamie >=20 > _______________________________________________ > freebsd-jail@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-jail > To unsubscribe, send any mail to "freebsd-jail-unsubscribe@freebsd.org"= The subnet mask of an alias should always be /32, not the actual subnet m= ask Try that change in jail.conf, it should sort the issue. --=20 Allan Jude --pKOE5KDC1QecrgJooAu6x8nA49jNDPw3G Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJUke1SAAoJEJrBFpNRJZKfcPYP/0xLGeSZEpC/e0Kmp6bBBr9I Dl6SZkJZXYB5SGJWADqJBTbLDXknLcMFwJBWIHLciXN+mZoSqMFM83/EooaRvwMr 4ZYKWOFEORQ4CZLor9UzvADLjCHvhxHzr25XaJxZGmaKt1CMAc78lo/C8Cq2/SpV ZpEnl5DrBDnBtJ5EbugL/CAFg0wIuuqyhMSWxq/F63VSg8/jfo4xf9xjcgKoL2AO sfv8A9gsr0J/Ne6bFTW0KWsMTQlFWqSRtkbg5sxqHMLylxfaynLPdWscGqtIzJQe r8RoR/7NXkjoLqw0Xgs7jHLrlIJ5mtibHZJ2NurLvE7FrtzLExaXgq4Hri9VAVrE FkcFbabyVaGvk6bz3Fa0oVYU4kuDxE7nDrhPHQUB2n3HR1LT1NbqeGBAB5rdmeY3 nwkn9GuK+krjuY0rnbUMtVio8raaSv3f+1/DtFalDE8PL55MUOefkvGi0Ecxwo93 4T0Hsw1qdZduDSdccOOKMlrTfovUQykyvpdrofwv3TiFDxEcuTUCYjUggX6DnrC5 7IURqsaZaOIL3QWMitCpfs3xwAK2f9vFjzrvuFQs+iAyZrEIckl9lLoS+XJ5crQ5 ctcZL42HXt6W2i/rC2Q2rnws2wKW5c2tsPrw3glKgupd8RYQTINHLhvmjzMgXxdE 39minP0N9pNSoMdi42wd =SaqD -----END PGP SIGNATURE----- --pKOE5KDC1QecrgJooAu6x8nA49jNDPw3G--
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