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Re: Fwd: Re: Unknown URL





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