14 Jun
2016
14 Jun
'16
2 p.m.
On Tue, Jun 14, 2016 at 1:23 PM, lleachii--- via 44Net <44net(a)hamradio.ucsd.edu>
wrote:
I see your list of Ethernet interfaces...but
where's your IPENCAP tunnel interface?
What commands are you using to set your IPENCAP interface Up?
Lynwood,
Thanks for the note. Setting up the IPENCAP interface is the thing
I haven't figured out yet. :-)
Here is an example of what I've tried:
# ifconfig gif0 create
# ifconfig gif0 tunnel 23.30.150.141 169.228.66.251 netmask 255.255.255.254
# route add -host 169.228.66.251 23.30.150.142
add host 169.228.66.251: gateway 23.30.150.142
# ifconfig gif0 inet 23.30.150.141 169.228.66.251 netmask 255.255.255.254
# ifconfig gif0
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
priority: 0
groups: gif
tunnel: inet 23.30.150.141 -> 169.228.66.251
inet 23.30.150.141 --> 169.228.66.251 netmask 0xfffffffe
# route add 44/8 23.30.150.141
add net 44/8: gateway 23.30.150.141
# netstat -rn -f inet
Routing tables
Internet:
Destination Gateway Flags Refs Use Mtu Prio Iface
default 23.30.150.142 UGS 4 48 - 8 cnmac0
23.30.150.136/29 23.30.150.141 UC 1 0 - 4 cnmac0
23.30.150.141 44:d9:e7:9f:a7:64 UHLl 0 77 - 1 cnmac0
23.30.150.142 4a:1d:70:de:c3:5a UHLc 2 9 - 4 cnmac0
23.30.150.143 23.30.150.141 UHb 0 0 - 1 cnmac0
44/8 23.30.150.141 UGS 0 33 - 8 gif0
44.44.107/24 44.44.107.1 C 0 0 - 4 cnmac2
44.44.107.1 44:d9:e7:9f:a7:66 UHLl 0 0 - 1 cnmac2
44.44.107.255 44.44.107.1 Hb 0 0 - 1 cnmac2
127/8 127.0.0.1 UGRS 0 0 32768 8 lo0
127.0.0.1 127.0.0.1 UHl 0 0 32768 1 lo0
169.228.66.251 23.30.150.142 UGHSP 0 11 - 8 cnmac0
169.228.66.251 23.30.150.141 UHP 0 0 - 8 gif0
192.168/16 192.168.129.1 UGS 3 3 - 8 cnmac1
192.168.129/24 192.168.129.4 UC 1 0 - 4 cnmac1
192.168.129.1 24:a4:3c:05:57:b5 UHLc 1 2 - 4 cnmac1
192.168.129.4 44:d9:e7:9f:a7:65 UHLl 0 7 - 1 cnmac1
192.168.129.255 192.168.129.4 UHb 0 0 - 1 cnmac1
224/4 127.0.0.1 URS 0 24 32768 8 lo0
#
Let's suppose I try to ping something based on this.
# ping -I 44.44.107.1 -c 5 44.0.0.1
PING 44.0.0.1 (44.0.0.1): 56 data bytes
--- 44.0.0.1 ping statistics ---
5 packets transmitted, 0 packets received, 100.0% packet loss
#
However, it appears these are being forwarded. In another window
I ran 'tcpdump -vni gif0' and see this output:
# tcpdump -vni gif0
tcpdump: listening on gif0, link-type LOOP
17:54:23.704315 44.44.107.1 > 44.0.0.1: icmp: echo request (id:17cb seq:0) [icmp cksum
ok] (ttl 255, id 47502, len 84)
17:54:24.715928 44.44.107.1 > 44.0.0.1: icmp: echo request (id:17cb seq:1) [icmp cksum
ok] (ttl 255, id 47611, len 84)
17:54:25.710780 44.44.107.1 > 44.0.0.1: icmp: echo request (id:17cb seq:2) [icmp cksum
ok] (ttl 255, id 16830, len 84)
17:54:26.705734 44.44.107.1 > 44.0.0.1: icmp: echo request (id:17cb seq:3) [icmp cksum
ok] (ttl 255, id 34739, len 84)
17:54:27.710742 44.44.107.1 > 44.0.0.1: icmp: echo request (id:17cb seq:4) [icmp cksum
ok] (ttl 255, id 32354, len 84)
^C
5 packets received by filter
0 packets dropped by kernel
#
And running 'tcpdump -vni cnmac0 proto ipencap' in yet another window
I see the following:
# tcpdump -vni cnmac0 proto ipencap
tcpdump: listening on cnmac0, link-type EN10MB
17:56:16.647503 23.30.150.141 > 169.228.66.251: 44.44.107.1 > 44.0.0.1: icmp: echo
request (id:1ace seq:0) (ttl 255, id 7822, len 84) (ttl 64, id 27590, len 104)
17:56:17.658425 23.30.150.141 > 169.228.66.251: 44.44.107.1 > 44.0.0.1: icmp: echo
request (id:1ace seq:1) (ttl 255, id 22527, len 84) (ttl 64, id 20077, len 104)
17:56:18.653338 23.30.150.141 > 169.228.66.251: 44.44.107.1 > 44.0.0.1: icmp: echo
request (id:1ace seq:2) (ttl 255, id 63017, len 84) (ttl 64, id 22814, len 104)
17:56:19.648295 23.30.150.141 > 169.228.66.251: 44.44.107.1 > 44.0.0.1: icmp: echo
request (id:1ace seq:3) (ttl 255, id 24579, len 84) (ttl 64, id 13778, len 104)
17:56:20.653301 23.30.150.141 > 169.228.66.251: 44.44.107.1 > 44.0.0.1: icmp: echo
request (id:1ace seq:4) (ttl 255, id 31869, len 84) (ttl 64, id 32539, len 104)
^C
21 packets received by filter
0 packets dropped by kernel
#
But, no responses are receieved. Perhaps I'm just not pinging the
right thing? Trying to ping '44.44.107.1' from an external address does
not see incoming packets, either.
Thanks for any help! 73 de AC2OI,
- Dan C.