Date: Fri, 23 Oct 2015 19:15:04 +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: <VI1PR06MB1037DEF140BB605358BB8616F9260@VI1PR06MB1037.eurprd06.prod.outlook.com> In-Reply-To: <562A7F88.4070106@freebsd.org> References: <VI1PR06MB1037B08D9BEB7B207C602F43F9260@VI1PR06MB1037.eurprd06.prod.outlook.com> <562A7147.5080002@freebsd.org> <VI1PR06MB1037CEABEFFBDA95CAF7691BF9260@VI1PR06MB1037.eurprd06.prod.outlook.com>, <562A7F88.4070106@freebsd.org>
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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 having=
an issue with networking.
>>
>>
>> OpenVPN daemon is up and running and I can connect successfully as a cli=
ent. I receive an IP address as expected, but I cannot route traffic to/fro=
m client/server. The routing table on the client (which is a Windows machin=
e) looks fine so I assume the issue is on the server side. I have a tun int=
erface 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 jail=
. 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 Met=
ric
>> 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 mu=
ch 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 hos=
t 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 1057=
7, length 40
> 18:44:02.605212 IP 10.8.0.6.56054 > 192.168.0.112.80: Flags [S], seq 5126=
33761, 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.co=
m. (34)
> 18:44:03.864800 IP 10.8.0.6.57441 > 8.8.8.8.53: 44379+ A? dns.msftncsi.co=
m. (34)
>
> After that I thought I'd see if the traffic is reaching the jail. After a=
llow the jail access to /dev/bpf I get the same results as the host, traffi=
c 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.co=
m. (34)
> 19:09:12.728708 IP 10.8.0.6.62332 > 8.8.8.8.53: 22238+ A? dns.msftncsi.co=
m. (34)
> 19:09:12.802903 IP 10.8.0.6.58706 > 8.8.8.8.53: 33345+ A? dns.msftncsi.co=
m. (34)
> 19:09:13.825053 IP 10.8.0.6.57107 > 212.56.71.30.443: Flags [S], seq 3139=
281876, 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 4152=
048904, 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 3107=
463099, 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.co=
m. (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"
>
>=20
> Can you include the output of 'ifconfig' from inside the jail?, and
> 'netstat -rn'
>
> It looks like the packets are reaching you on tun0
>=20
> --
> Allan Jude
ifconfig from Jail
----------------------
vtnet0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1=
500
options=3D6c03bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWC=
SUM,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,VL=
AN_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
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