Date: Fri, 23 Oct 2015 20:45:04 +0000 From: James Lodge <James@Lodge.me.uk> To: "freebsd-jail@freebsd.org" <freebsd-jail@freebsd.org> Subject: Re: Freebsd 10.1 - Ezjail - OpenVPN - Tun Interface Message-ID: <VI1PR06MB1037C158EDC4CB4DB9A0E31AF9260@VI1PR06MB1037.eurprd06.prod.outlook.com> In-Reply-To: <562A9772.5050408@freebsd.org> References: <VI1PR06MB1037B08D9BEB7B207C602F43F9260@VI1PR06MB1037.eurprd06.prod.outlook.com> <562A7147.5080002@freebsd.org> <VI1PR06MB1037CEABEFFBDA95CAF7691BF9260@VI1PR06MB1037.eurprd06.prod.outlook.com> <562A7F88.4070106@freebsd.org> <VI1PR06MB1037DEF140BB605358BB8616F9260@VI1PR06MB1037.eurprd06.prod.outlook.com>, <562A9772.5050408@freebsd.org>
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>On 2015-10-23 15:15, James Lodge wrote:
> On 2015-10-23 14:13, James Lodge wrote:
>>> On 2015-10-23 11:37, James Lodge wrote:
>>> Hello all,
>>>
>>>
>>> I'm trying to build a jail on FreeBSD 10.1 using ezjail in order to run=
OpenVPN. I'm not using vimage and don't particularly want to but I'm havin=
g an issue with networking.
>>>
>>>
>>> OpenVPN daemon is up and running and I can connect successfully as a cl=
ient. I receive an IP address as expected, but I cannot route traffic to/fr=
om client/server. The routing table on the client (which is a Windows machi=
ne) looks fine so I assume the issue is on the server side. I have a tun in=
terface created on the host and exposed to the jail via devfs rules. The IP=
address on the tun interface is configure on the host and not from the jai=
l. I can ping the tun interface IP from the host and the jail, but not from=
the client when connected.
>>>
>>>
>>> Client---------public IP --------- lo1 (Jail alias Interface)------tun0=
(OpenVPN Interface)
>>>
>>> 10.8.06 x.x.x.x 172.16.1.8 =
10.8.0.1
>>>
>>>
>>>
>>> OpenVPN Jail Routing Table:
>>>
>>> Internet:
>>> Destination Gateway Flags Netif Expire
>>> 172.16.1.8 link#4 UH lo1
>>>
>>> Jail Host Routing Table:
>>> Internet:
>>> Destination Gateway Flags Netif Expire
>>> default x.x.0.1 UGS vtnet0
>>> 10.8.0.0 10.8.0.2 UGS tun0
>>> 10.8.0.1 link#5 UHS lo0
>>> 10.8.0.2 link#5 UH tun0
>>> x.x.0.0/18 link#1 U vtnet0
>>> x.x.x.x link#1 UHS lo0
>>> localhost link#3 UH lo0
>>> 172.16.1.1 link#4 UH lo1
>>> 172.16.1.2 link#4 UH lo1
>>> 172.16.1.3 link#4 UH lo1
>>> 172.16.1.4 link#4 UH lo1
>>> 172.16.1.5 link#4 UH lo1
>>> 172.16.1.6 link#4 UH lo1
>>> 172.16.1.7 link#4 UH lo1
>>> 172.16.1.8 link#4 UH lo1
>>>
>>> Client Routing Table:
>>>
>>> IPv4 Route Table
>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
>>> Active Routes:
>>> Network Destination Netmask Gateway Interface Me=
tric
>>> 0.0.0.0 0.0.0.0 10.8.0.5 10.8.0.6 =
20
>>> 10.8.0.1 255.255.255.255 10.8.0.5 10.8.0.6 =
20
>>> 10.8.0.4 255.255.255.252 On-link 10.8.0.6 =
276
>>> 10.8.0.6 255.255.255.255 On-link 10.8.0.6 =
276
>>> 10.8.0.7 255.255.255.255 On-link 10.8.0.6 =
276
>>>
>>>
>>>
>>> I'm a little stumped as to how to trouble shoot the issue so any help m=
uch appreciated.
>>>
>>>
>>> James
>>>
>>>
>>>
>>> _______________________________________________
>>> freebsd-jail@freebsd.org mailing list
>>> https://lists.freebsd.org/mailman/listinfo/freebsd-jail
>>> To unsubscribe, send any mail to "freebsd-jail-unsubscribe@freebsd.org"
>>>
>>
>>> Try running 'tcpdump -i tun0 -n' on the host, while pining from the
>>> windows machine, and see if the packets are arriving.
>>>
>>> --
>>> Allan Jude
>>
>>
>> Thank you Allan,
>>
>> I should have thought of tcpdump. So traffic is being received at the ho=
st from the windows client.
>>
>> Results from Host tcpdump -i tun0 -n
>>
>> 18:44:02.464291 IP 10.8.0.6 > 10.8.0.1: ICMP echo request, id 1, seq 105=
77, length 40
>> 18:44:02.605212 IP 10.8.0.6.56054 > 192.168.0.112.80: Flags [S], seq 512=
633761, win 8192, options [mss 1368,nop,nop,sackOK], length 0
>> 18:44:02.872693 IP 10.8.0.6.57441 > 8.8.8.8.53: 44379+ A? dns.msftncsi.c=
om. (34)
>> 18:44:03.864800 IP 10.8.0.6.57441 > 8.8.8.8.53: 44379+ A? dns.msftncsi.c=
om. (34)
>>
>> After that I thought I'd see if the traffic is reaching the jail. After =
allow the jail access to /dev/bpf I get the same results as the host, traff=
ic is received.
>>
>> Results from Jail tcpdump -i tun0 -n
>>
>> 19:09:11.899714 IP 10.8.0.6.58706 > 8.8.8.8.53: 33345+ A? dns.msftncsi.c=
om. (34)
>> 19:09:12.728708 IP 10.8.0.6.62332 > 8.8.8.8.53: 22238+ A? dns.msftncsi.c=
om. (34)
>> 19:09:12.802903 IP 10.8.0.6.58706 > 8.8.8.8.53: 33345+ A? dns.msftncsi.c=
om. (34)
>> 19:09:13.825053 IP 10.8.0.6.57107 > 212.56.71.30.443: Flags [S], seq 313=
9281876, win 8192, options [mss 1368,nop,wscale 8,nop,nop,sackOK], length 0
>> 19:09:13.981307 IP 10.8.0.6.57108 > 212.56.71.30.443: Flags [S], seq 415=
2048904, win 8192, options [mss 1368,nop,wscale 8,nop,nop,sackOK], length 0
>> 19:09:14.628697 IP 10.8.0.6.57100 > 192.168.0.112.80: Flags [S], seq 310=
7463099, win 65535, options [mss 1368,nop,nop,sackOK], length 0
>> 19:09:14.814392 IP 10.8.0.6.58706 > 8.8.8.8.53: 33345+ A? dns.msftncsi.c=
om. (34)
>>
>>
>> Regards
>> James
>> _______________________________________________
>> freebsd-jail@freebsd.org mailing list
>> https://lists.freebsd.org/mailman/listinfo/freebsd-jail
>> To unsubscribe, send any mail to "freebsd-jail-unsubscribe@freebsd.org"
>>
>>
>> Can you include the output of 'ifconfig' from inside the jail?, and
>> 'netstat -rn'
>>
>> It looks like the packets are reaching you on tun0
>>
>> --
>> Allan Jude
>
> ifconfig from Jail
> ----------------------
>
> vtnet0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu=
1500
> options=3D6c03bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_H=
WCSUM,TSO4,TSO6,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
> ether 04:01:5d:21:c3:01
> media: Ethernet 10Gbase-T <full-duplex>
> status: active
>
> vtnet1: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
> options=3D6c03bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,=
VLAN_HWCSUM,TSO4,TSO6,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
> ether 04:01:5d:21:c3:02
> media: Ethernet 10Gbase-T <full-duplex>
> status: active
>
> lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
> options=3D600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
>
> lo1: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
> options=3D600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
> inet 172.16.1.8 netmask 0xffffffff
>
> tun0: flags=3D8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
> options=3D80000<LINKSTATE>
> Opened by PID 9024
>
> pflog0: flags=3D141<UP,RUNNING,PROMISC> metric 0 mtu 33160
>
>
> netstat -rn from Jail
> ---------------------------
>
> Routing tables
>
> Internet:
> Destination Gateway Flags Netif Expire
> 172.16.1.8 link#4 UH lo1
>
>
> Regards
> James
>
>
>
>
> _______________________________________________
> freebsd-jail@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-jail
> To unsubscribe, send any mail to "freebsd-jail-unsubscribe@freebsd.org"
>
>
> Look at 'jls' on the host, as your jail doesn't seem to have any IP
> addresses on tun0.
>
> Or, where are you expecting to receive the traffic?
>
> --
> Allan Jude
I expect the traffic to be received within the jail. I find it strange that=
I don't see the same IP address as what I see on the host. Could this be a=
devfs rule issue? what should I be looking for with jls?
ifconfig from host
_______________
tun0: flags=3D8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1500
options=3D80000<LINKSTATE>
inet 10.8.0.1 --> 10.8.0.2 netmask 0xffffffff
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
Opened by PID 9024
Regards
James
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