On 02/22/2018 12:52 PM, Reco wrote:
Hi.
On Thu, Feb 22, 2018 at 12:29:12PM -0500, Stephen P. Molnar wrote:
After installing tcpdump I got:
root@AbNormal:/home/comp# tcpdump -ni any -s0 -w /tmp/fastly.pcap tcp port
80 or icmp6 or \
udp port 53
tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size
262144 bytes
^C6 packets captured
6 packets received by filter
0 packets dropped by kernel
root@AbNormal:/home/comp#
The file. Please send the file. <======== what file?
The next part *looks* normal, but it ain't.
root@AbNormal:/home/comp# ip a l
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UP group default qlen 1000
link/ether bc:ee:7b:5e:83:36 brd ff:ff:ff:ff:ff:ff
..
inet6 2600:1700:4280:3690::46/128 scope global dynamic
valid_lft 1201940sec preferred_lft 1201940sec
inet6 2600:1700:4280:3690:800c:68fc:ea2c:23c0/64 scope global temporary
dynamic
valid_lft 597140sec preferred_lft 78692sec
inet6 2600:1700:4280:3690:beee:7bff:fe5e:8336/64 scope global mngtmpaddr
noprefixroute dynamic
valid_lft 1209054sec preferred_lft 1209054sec
These are your usual run-of-the-mill IPv6 addresses procured via RA,
except for 2600:1700:4280:3690::46/128.
I fail to imagine why would *anyone* provide a /128 address via RA.
Unless they are controlled by aliens or work for IBM, of course.
root@AbNormal:/home/comp# ip ro l table all
..
2600:1700:4280:3690::46 dev enp2s0 proto kernel metric 256 expires
1201893sec pref medium
2600:1700:4280:3690::/64 dev enp2s0 proto ra metric 100 pref medium
2600:1700:4280:3690::/60 via fe80::3e04:61ff:feb3:3c20 dev enp2s0 proto ra
metric 100 pref medium
..
These are, well, uncommon.
2600:1700:4280:3690::46 is there because you have /128 address.
/64 route is there because you have IPv6 addresses with the same mask
assigned.
/60 route was provided you by RA. Probably means that your ISP is
generous, and by itself it could be the source of your trouble.
default via fe80::3e04:61ff:feb3:3c20 dev enp2s0 proto static metric 100
pref medium
And this is your "default gateway" route.
root@AbNormal:/home/comp# traceroute -n 2a04:4e42:b::204
traceroute to 2a04:4e42:b::204 (2a04:4e42:b::204), 30 hops max, 80 byte
packets
1 * * *
This is bad. Your IPv6 traffic cannot pass even a default gateway.
Meaning, I require a couple of additional tests.
1) ping -c2 fe80::3e04:61ff:feb3:3c20%enp2s0
Should work, but never hurts to check.
2) ip a d 2600:1700:4280:3690::46/128
traceroute -n 2a04:4e42:b::204
3) ip -6 ro d 2600:1700:4280:3690::/60
traceroute -n 2a04:4e42:b::204
Reco
Reco
Please see comment at top of your reply.
The next lies are keyed to you numbered request:
1) root@AbNormal:/home/comp# ping -c2 fe80::3e04:61ff:feb3:3c20%enp2s0
PING fe80::3e04:61ff:feb3:3c20%enp2s0(fe80::3e04:61ff:feb3:3c20%enp2s0)
56 data bytes
64 bytes from fe80::3e04:61ff:feb3:3c20%enp2s0: icmp_seq=1 ttl=64
time=0.258 ms
64 bytes from fe80::3e04:61ff:feb3:3c20%enp2s0: icmp_seq=2 ttl=64
time=0.201 ms
--- fe80::3e04:61ff:feb3:3c20%enp2s0 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1003ms
rtt min/avg/max/mdev = 0.201/0.229/0.258/0.032 ms
2) root@AbNormal:/home/comp# ip a d 2600:1700:4280:3690::46/128
Not enough information: "dev" argument is required.
root@AbNormal:/home/comp# traceroute -n 2a04:4e42:b::204
traceroute to 2a04:4e42:b::204 (2a04:4e42:b::204), 30 hops max, 80 byte
packets
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
3) root@AbNormal:/home/comp# ip -6 ro d 2600:1700:4280:3690::/60
root@AbNormal:/home/comp#
root@AbNormal:/home/comp# traceroute -n 2a04:4e42:b::204
traceroute to 2a04:4e42:b::204 (2a04:4e42:b::204), 30 hops max, 80 byte
packets
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
I'm not sure if I got the 2) commands correctly
Steve
--
Stephen P. Molnar, Ph.D.
Consultant
www.molecular-modeling.net
(614)312-7528 (c)
Skype: smolnar1
