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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