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Confusing connectivity problems


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#1 jdcaudle

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Posted 09 April 2016 - 05:59 AM

The problem:

  • Certain sites won't load. Airbnb and wikipedia are two examples. Others work fine.
  • The browser shows "establishing secure connection" then eventually times out.
  • The problem exists across devices and OS: a recently-updated iPad air 2, two different android cell phones, and an ASUS laptop running windows 10.

 

Context:

  • As stated, the problem is across multiple device formats and OS.
  • The problem disappears on other wifi networks or when using a mobile data connection (on the phone, or as a hotspot).
  • Some sites do load. This forum, for example. Google search works. So does youtube. My school's moodle works (moodle.is.ed.ac.uk/my/).
  • I am at an Airbnb stay in Bosnia. The wireless router plugs into a powerline ethernet adapter. The other end of that (another powerline adapter in an outlet in another room) connects to a POE/LAN junction which then connects (POE end) to a modem/router-sized box (powered by a 12V DC adapter in the house, via the POE connection) strapped to a mast outside the house that also supports a sat dish and an antenna. There appears to be only one cable coming from that box - the one going to the POE port.

Things Attempted:

  • Resetting/power cycling the router, both powerline adapters, and the 12V POE adapter.
  • Using a different router (we have a RAVpower charger/router)
  • Putting a router on the first line in, after the POE connection (ie. removing the powerline devices from the equation)
  • The airbnb host called the ISP and they said it "looks fine" from their end
  • I asked the airbnb host to call the ISP to request an IP reset.

 

Any ideas? I'm here for a week, maybe two, and need to complete a final assignment for a masters course. I'm quite motivated to get this to work.



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#2 Agouti

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Posted 09 April 2016 - 07:17 AM

The problem disappears on other wifi networks or when using a mobile data connection (on the phone, or as a hotspot).

Since the problem disappears on other networks, I suspect your WAN IP was banned by the sites you can't connect to.

I asked the airbnb host to call the ISP to request an IP reset.

See if you could get the ISP to change the WAN IP address.  If you could connect after, it would prove that your IP was blocked.



#3 jdcaudle

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Posted 09 April 2016 - 07:38 AM

 

The problem disappears on other wifi networks or when using a mobile data connection (on the phone, or as a hotspot).

Since the problem disappears on other networks, I suspect your WAN IP was banned by the sites you can't connect to.

I asked the airbnb host to call the ISP to request an IP reset.

See if you could get the ISP to change the WAN IP address.  If you could connect after, it would prove that your IP was blocked.

 

 

I just messaged the host to clarify this. To elaborate on what I already did, I asked to have the DHCP lease broken (to get a new IP) and the host told me they said they reset it.

 

Does this happen - IP blocking across huge swaths of the internet? Wikipedia, Airbnb, my (Canadian) bank, an Australian newspaper, a recipe site... Running an image search on google and clicking "visit page" is unsuccessful almost 1/2 of the time.



#4 Agouti

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Posted 09 April 2016 - 08:34 AM

Yes.  It's strange that so much is being blocked.  Sounds like the Great Firewall of China.  Do you know for sure whether the host changed your IP?  Did you look up your WAN IP before and compare it to make sure it changed?



#5 Wand3r3r

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Posted 09 April 2016 - 10:50 AM

this sounds more like dns poisoning.

 

at a command prompt do a nslookup yahoo.com and post a screen shot of the results



#6 jdcaudle

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Posted 10 April 2016 - 12:35 AM

Yes.  It's strange that so much is being blocked.  Sounds like the Great Firewall of China.  Do you know for sure whether the host changed your IP?  Did you look up your WAN IP before and compare it to make sure it changed?

 

Unfortunately no. I certainly should have.

 

this sounds more like dns poisoning.

 

at a command prompt do a nslookup yahoo.com and post a screen shot of the results

 

Done:

C:\Users\J>nslookup yahoo.com
Server:  UnKnown
Address:  192.168.1.20


Non-authoritative answer:
Name:    yahoo.com
Addresses:  2001:4998:44:204::a7
          2001:4998:c:a06::2:4008
          2001:4998:58:c02::a9
          98.138.253.109
          98.139.183.24
          206.190.36.45


Edited by jdcaudle, 10 April 2016 - 12:35 AM.


#7 jdcaudle

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Posted 10 April 2016 - 12:48 AM

this sounds more like dns poisoning.

 

at a command prompt do a nslookup yahoo.com and post a screen shot of the results

 

Do note that yahoo.com actually does load. For a non-working site:

 

C:\Users\J>nslookup wikipedia.org
Server:  UnKnown
Address:  192.168.1.20
 
Non-authoritative answer:
Name:    wikipedia.org
Addresses:  2620:0:863:ed1a::1
          198.35.26.96


#8 Wand3r3r

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Posted 10 April 2016 - 01:26 PM

Nslookups look good though I would point at a dns server not what appears to be your gateway ip at .20 which is why you get the server unknown message.

 

Pick a dns server close to your location and set it as the dns server



#9 jdcaudle

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Posted 11 April 2016 - 02:21 AM

Nslookups look good though I would point at a dns server not what appears to be your gateway ip at .20 which is why you get the server unknown message.

 

Pick a dns server close to your location and set it as the dns server

 

Thanks.

 

I tried this (using openDNS') and the problem persists.



#10 jdcaudle

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Posted 11 April 2016 - 02:41 AM

I figured out the ISP. Not sure if this will provide any insight:

 

http://moja.mreza-wisp.ba/o-nama/tehniki-podaci.html

 

It's a WISP, which I have never heard of before. That explains the box on the mast with a single downstream cable coming from it.



#11 jdcaudle

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Posted 11 April 2016 - 03:58 AM

Also, I tried using a VPN (Tunnelbear, through Italy) and it cleared up the problem. Does that help diagnose?



#12 Wand3r3r

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Posted 11 April 2016 - 12:25 PM

Here are dns servers you should be using

http://www.bestdns.org/for/ba/

or use the ones in your wisp link

DNS SERVERI:

178.239.16.2

178.239.20.2

 

The vpn shows that something is blocking you, most likely a firewall.

 

Please do the following:

via command prompt

type tracert wikipedia.org and post the results for review

type tracert 198.35.26.96 and post the results for review


Edited by Wand3r3r, 11 April 2016 - 12:26 PM.


#13 jdcaudle

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Posted 11 April 2016 - 04:01 PM

Here are dns servers you should be using

http://www.bestdns.org/for/ba/

or use the ones in your wisp link

DNS SERVERI:

178.239.16.2

178.239.20.2

 

The vpn shows that something is blocking you, most likely a firewall.

 

Please do the following:

via command prompt

type tracert wikipedia.org and post the results for review

type tracert 198.35.26.96 and post the results for review

 

I tried the ISP's posted DNS and it didn't help.

 

Tracert results:

 

C:\Users\J>tracert wikipedia.org
 
Tracing route to wikipedia.org [91.198.174.192]
over a maximum of 30 hops:
 
  1     *        *        *     Request timed out.
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
(etc)
 
and...
 
C:\Users\J>tracert 198.35.26.96
 
Tracing route to text-lb.ulsfo.wikimedia.org [198.35.26.96]
over a maximum of 30 hops:
 
  1     *        *        *     Request timed out.
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
 

and so forth.



#14 Wand3r3r

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Posted 11 April 2016 - 10:07 PM

the request time outs start at your router.

 

either it has been configured to not pass thru icmp messages [doubtful] or there is something wrong with the router

 

might want to document the config, reset the router and reconfig from scratch.



#15 jdcaudle

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Posted 12 April 2016 - 01:51 AM

the request time outs start at your router.

 

either it has been configured to not pass thru icmp messages [doubtful] or there is something wrong with the router

 

might want to document the config, reset the router and reconfig from scratch.

 

Replaced the router and the problem persists (certain sites not loading)... but at least I get this:

 

C:\Users\J>tracert wikipedia.org
 
Tracing route to wikipedia.org [198.35.26.96]
over a maximum of 30 hops:
 
  1     1 ms    <1 ms     1 ms  RP-WD03 [10.10.10.254]
  2     4 ms     4 ms     3 ms  192.168.1.20
  3     6 ms     7 ms     5 ms  10.1.100.30
  4     7 ms     5 ms     6 ms  10.1.100.29
  5    10 ms     9 ms     9 ms  10.0.100.173
  6    93 ms    21 ms    55 ms  10.1.100.9
  7    27 ms   185 ms    25 ms  212.39.98.205
  8   248 ms    23 ms    27 ms  brdrmo-mo2.tel.net.ba [85.94.144.181]
  9   316 ms    41 ms    33 ms  195.29.110.205
 10    51 ms    38 ms    94 ms  gtr11-gdr11.ip.t-com.hr [195.29.110.222]
 11    51 ms    52 ms    37 ms  87.128.238.81
 12    43 ms    71 ms    33 ms  f-ee7-i.F.DE.NET.DTAG.DE [62.156.131.154]
 13    47 ms    51 ms    62 ms  87.190.232.158
 14    48 ms    47 ms    87 ms  ffm-bb1-link.telia.net [62.115.116.161]
 15    38 ms    55 ms   192 ms  prs-bb3-link.telia.net [62.115.143.89]
 16   216 ms   304 ms   304 ms  sjo-b21-link.telia.net [80.91.252.46]
 17   307 ms    73 ms   227 ms  nyk-bb1-link.telia.net [62.115.135.94]
 18   216 ms    59 ms   175 ms  ash-bb3-link.telia.net [62.115.137.60]
 19   181 ms   302 ms   201 ms  nyk-bb2-link.telia.net [213.155.135.67]
 20   306 ms   201 ms   304 ms  text-lb.ulsfo.wikimedia.org [198.35.26.96]
 
Trace complete.
 
and
 
C:\Users\J>tracert 198.35.26.96
 
Tracing route to text-lb.ulsfo.wikimedia.org [198.35.26.96]
over a maximum of 30 hops:
 
  1    12 ms     1 ms     2 ms  RP-WD03 [10.10.10.254]
  2     6 ms     4 ms     6 ms  192.168.1.20
  3    10 ms     5 ms     5 ms  10.1.100.30
  4     7 ms     5 ms     5 ms  10.1.100.29
  5     8 ms     7 ms     7 ms  10.0.100.173
  6    30 ms    38 ms    35 ms  10.1.100.9
  7    13 ms    13 ms    56 ms  212.39.98.205
  8    25 ms    21 ms    20 ms  brdrmo-mo2.tel.net.ba [85.94.144.181]
  9    60 ms    37 ms    28 ms  195.29.110.205
 10    32 ms    29 ms     *     gtr11-gdr11.ip.t-com.hr [195.29.110.222]
 11    47 ms    48 ms    51 ms  87.128.238.81
 12    60 ms    41 ms    49 ms  f-ee7-i.F.DE.NET.DTAG.DE [62.156.131.154]
 13    44 ms    70 ms    43 ms  87.190.232.158
 14    64 ms    51 ms    33 ms  ffm-bb1-link.telia.net [62.115.116.161]
 15   207 ms   200 ms   201 ms  ash-bb3-link.telia.net [80.91.246.60]
 16   204 ms   308 ms    54 ms  ffm-bb2-link.telia.net [62.115.141.238]
 17    63 ms   307 ms   304 ms  wikimedia-ic-308844-sjo-b21.c.telia.net [80.239.192.66]
 18   255 ms   201 ms   149 ms  ash-bb3-link.telia.net [213.155.130.77]
 19   423 ms   304 ms   326 ms  sjo-b21-link.telia.net [80.91.252.46]
 20   308 ms   303 ms   253 ms  text-lb.ulsfo.wikimedia.org [198.35.26.96]
 
Trace complete.
 
It's not my router (airbnb stay) so I haven't done a "reset" beyond unplugging it for awhile. I will try to access the config as it is and take a look. I assume this is necessary to document the config, if I understand you correctly.
 
Thanks!





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