nanog mailing list archives

Re: Anyone else having trouble reaching thepiratebay.se? AS39138


From: Javier J <javier () advancedmachines us>
Date: Thu, 27 Nov 2014 14:16:12 -0500

It was working for me a few hours ago, and now dead at hop 3 on FIOS again.

If they have 2 prefixes being advertised from AS51040
http://bgp.he.net/AS51040#_prefixes  Why can I traceroute to 1 but not the
other?

[root@tor-proxy network-scripts]# mtr --report -c 5 194.14.56.1
HOST: tor-proxy.home              Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. pfsense.home                  0.0%     5    0.5   1.0   0.4   2.7   1.0
  2. L100.NWRKNJ-VFTTP-134.verizo  0.0%     5    1.3   6.0   1.3  20.6   8.3
  3. G0-5-3-4.NWRKNJ-LCR-22.veriz  0.0%     5    3.2   4.6   3.2   6.7   1.4
  4. ae0-0.NWRK-BB-RTR2.verizon-g  0.0%     5    5.9   8.4   4.9  20.7   6.8
  5. ???                          100.0     5    0.0   0.0   0.0   0.0   0.0
  6. 0.ae2.BR3.NYC4.ALTER.NET      0.0%     5    6.8   6.7   6.6   6.9   0.1
  7. 204.255.169.234               0.0%     5    5.4   5.7   5.2   7.1   0.8
  8. ae-2.r23.nycmny01.us.bb.gin.  0.0%     5    6.2   7.1   5.9  11.0   2.2
  9. ae-6.r21.frnkge03.de.bb.gin. 60.0%     5   94.5  92.6  90.7  94.5   2.7
 10. ae-1.r02.frnkge03.de.bb.gin.  0.0%     5   95.2  94.3  93.1  95.6   1.1
 11. 213.198.77.214                0.0%     5   92.7  93.4  92.7  94.1   0.5
 12. et030-4.RT.TC1.STO.SE.retn.n  0.0%     5  109.2 109.4 109.0 110.9   0.8
 13. GW-ObeNetwork.retn.net        0.0%     5  116.0 190.0 111.1 341.8 100.4
 14. moria-cr-3.piratpartiet.se   20.0%     5  110.1 111.6 109.9 116.1   2.9


[root@tor-proxy network-scripts]# mtr --report -c 5 194.71.107.27
HOST: tor-proxy.home              Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. pfsense.home                  0.0%     5    0.6   0.4   0.3   0.6   0.1
  2. L100.NWRKNJ-VFTTP-134.verizo  0.0%     5    1.4   7.1   1.4  29.1  12.3
  3. ???                          100.0     5    0.0   0.0   0.0   0.0   0.0


The site works 100 % fine over vpn or proxy. So I don't think this is
related to any DDOS attack.




On Thu, Nov 27, 2014 at 2:06 PM, Phil Bedard <bedard.phil () gmail com> wrote:

In the post you quoted it says:

"In my last post I pointed out the do not announce to peers
community AS5580 was sending to Cogent, Level3 and who knows who else. So
any ASN that is not a customer of Cogent or Level3 wont learn the 5580 path
from them."

Verizon, ATT, and the rest of those networks are Tier-1 networks meaning
if 5580 was tagging the route with do-not-advertise to their transit
providers (Level3 & Cogent) the other Tier-1s wouldn't have another route
to it.  Looking at routing updates there were a lot of them yesterday for
that prefix, for whatever reason.  The lack of reachability was completely
due to Atrato, had nothing to do with the ISPs in the US.

It was reachable for me yesterday on our network, but we peer directly
with Atrato.

It's possible they did it to stop a DDoS, some other kind of attack, or
any number of reasons.

Phil






On 11/27/14, 2:47 PM, "Javier J" <javier () advancedmachines us> wrote:

Looks like its working now (on FIOS anyway)

Curious to know why the major networks stopped seeing it yesterday as
well.

On Thu, Nov 27, 2014 at 12:45 AM, Courtney Smith
<courtneysmith () comcast net>
wrote:


No problem here in Los Angeles either, but seeing a lone route through
Atrato only.

flags destination          gateway          lpref   med aspath origin
*>    194.71.107.0/24      <>     100     0 3491 5580 39138 22351
2.207
51040 i
*     194.71.107.0/24      <>       100     0 174 5580 39138 22351
2.207 51040 i


On 11/27/2014 午前 11:24, Tony Wicks wrote:

No problem here in New Zealand

tonyw@vrhost1-w> show route 194.71.107.0/24

icore1-w.inet.0: 519451 destinations, 525214 routes (519437 active,
14
holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

194.71.107.0/24    *[BGP/170] 10:25:44, MED 0, localpref 90
                       AS path: 4826 5580 39138 22351 131279 51040 I,
validation-state: unverified
                     > to 175.45.102.9 via ae1.526


Hopefully the body cones thru this time.  The issue isn't city or
country
based.  In my last post I pointed out the do not announce to peers
community AS5580 was sending to Cogent, Level3 and who knows who else.
So
any ASN that is not a customer of Cogent or Level3 wont learn the 5580
path
from them.

When I checked a few hours ago, Comcast, Centurylink, AT&T, TATA, and
possibly Sprint were not seeing the /24 based on their public looking
glasses or route servers.  Have not had time to run bgplay  to see if
routeviews data shows how they previously saw the /24 in past 30 days.
Finding the ASN(s) they used to see from would shed light on why they
stopped seeing.   Checking bgplay and contacting AS51040 to reach out to
their upstreams is my suggestion.




Current thread: