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Author Topic: I can't get to 194.35.194.231 [edit: My misinterpretation]  (Read 247 times)

Weaver

  • Kitizen
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  • Posts: 4680
  • Retd sw dev; A&A; 3 7km ADSL2; IPv6; Firebrick

Starting from the ISP AA and tracing route northwards from London towards 194.35.194.231= smo.uhi.ac.uk the traceroute gets as far as Leeds, then to Edinburgh and then dies. That particular box is actually physically here in Skye just down the road.

Tested at 0502 am

Btw the website www.uhi.ac.uk (different domain, missing 'smo') is I think hosted by a CDN at who knows where and that is up, but it is of no relevance, so don't let that mislead anyone.

Traceroute -> 194.35.194.231
No   Time(ms)   IP Address   Note   Name
1   36.081   81.187.81.187   Progress      
2   35.032   90.155.53.101   Progress      
3   36.592   195.66.224.15   Progress      
4   37.593   146.97.35.169   Progress      
5   44.323   146.97.33.62   Progress      
6   53.941   146.97.33.29   Progress      
7   42.758   146.97.33.49   Progress      
8   45.039   146.97.37.238   Progress      
9         No reply      
10         No reply      
11         No reply      
12         No reply      
13         No reply      
14         No reply      
15         No reply      
16         No reply      
17         No reply      
18         No reply      
19         No reply      
20         No reply      
« Last Edit: May 11, 2018, 10:01:43 AM by Weaver »
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d2d4j

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Hi Weaver

I am sorry, I can access the website without issue and my tracert is below.

I would consider the timeouts to be a firewall/edge dropping of pings

Many thanks

John


Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

tracert smo.uhi.ac.uk

Tracing route to smo.uhi.ac.uk [194.35.194.231]
over a maximum of 30 hops:

  1     1 ms    <1 ms     1 ms  192.168.18.1
  2     1 ms     1 ms     1 ms  192.168.1.1
  3    16 ms    16 ms    16 ms  host81-139-192-1.in-addr.btopenworld.com [81.139
.192.1]
  4    16 ms    16 ms    16 ms  213.120.182.141
  5    17 ms    17 ms    16 ms  213.120.161.82
  6    17 ms    17 ms    17 ms  213.120.182.65
  7    17 ms    17 ms    18 ms  31.55.164.107
  8    17 ms    17 ms    17 ms  109.159.248.75
  9    22 ms    22 ms    22 ms  109.159.248.182
 10    23 ms    23 ms    24 ms  peer5-te0-9-0-7.telehouse.ukcore.bt.net [109.159
.254.144]
 11    24 ms    23 ms    23 ms  195.99.125.18
 12    21 ms    21 ms    21 ms  ae24.londtt-sbr1.ja.net [146.97.35.193]
 13    40 ms    21 ms    21 ms  ae28.londtw-sbr2.ja.net [146.97.33.62]
 14    27 ms    27 ms    26 ms  ae31.lowdss-sbr1.ja.net [146.97.33.29]
 15    27 ms    26 ms    26 ms  ae29.leedaq-sbr2.ja.net [146.97.33.49]
 16    30 ms    30 ms    29 ms  ae21.edinsc-ban1.ja.net [146.97.37.238]
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.
Logged

Weaver

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Ah, I've got you - ja.net or more likely the edge of uhi.ac.uk is just filtering out pings. Thank you for that.

Good what an utter fool, I never tried just went ahead and tried tcp port 80. >:( :-[

I wonder if they filter all ICMP out and then break path mtu discovery because if so then that would be very nasty. But maybe it is just ping.
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burakkucat

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Re: I can't get to 194.35.194.231 [edit: My misinterpretation]
« Reply #3 on: May 11, 2018, 05:39:57 PM »

Looking from a slightly different angle --

Code: [Select]
[Duo2 ~]$ host smo.uhi.ac.uk
smo.uhi.ac.uk has address 194.35.194.231
smo.uhi.ac.uk mail is handled by 10 damh.smo.uhi.ac.uk.
[Duo2 ~]$ ping -c1 smo.uhi.ac.uk
PING smo.uhi.ac.uk (194.35.194.231) 56(84) bytes of data.

--- smo.uhi.ac.uk ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 10000ms

[Duo2 ~]$ sudo traceroute -T smo.uhi.ac.uk
traceroute to smo.uhi.ac.uk (194.35.194.231), 30 hops max, 60 byte packets
 1  AP (192.168.230.254)  3.064 ms  3.064 ms  3.051 ms
 2  host-78-151-238-209.as13285.net (78.151.238.209)  33.939 ms  33.941 ms  33.923 ms
 3  host-78-151-238-208.as13285.net (78.151.238.208)  33.902 ms  37.302 ms  37.300 ms
 4  host-78-144-14-114.as13285.net (78.144.14.114)  40.129 ms host-78-144-14-102.as13285.net (78.144.14.102)  40.114 ms host-78-144-14-116.as13285.net (78.144.14.116)  40.098 ms
 5  host-78-144-14-102.as13285.net (78.144.14.102)  42.493 ms linx-gw1.ja.net (195.66.224.15)  42.474 ms  42.457 ms
 6  ae23.londtt-sbr1.ja.net (146.97.35.169)  45.057 ms  42.022 ms linx-gw1.ja.net (195.66.224.15)  41.836 ms
 7  ae28.londtw-sbr2.ja.net (146.97.33.62)  41.700 ms  33.026 ms  32.968 ms
 8  ae31.lowdss-sbr1.ja.net (146.97.33.29)  37.442 ms ae28.londtw-sbr2.ja.net (146.97.33.62)  37.313 ms ae31.lowdss-sbr1.ja.net (146.97.33.29)  36.954 ms
 9  ae31.lowdss-sbr1.ja.net (146.97.33.29)  36.733 ms ae29.leedaq-sbr2.ja.net (146.97.33.49)  40.800 ms  37.812 ms
10  ae21.edinsc-ban1.ja.net (146.97.37.238)  42.577 ms ae29.leedaq-sbr2.ja.net (146.97.33.49)  39.281 ms  37.535 ms
11  146.97.41.178 (146.97.41.178)  51.508 ms  52.299 ms ae21.edinsc-ban1.ja.net (146.97.37.238)  42.597 ms
12  146.97.41.178 (146.97.41.178)  52.456 ms  54.221 ms  54.189 ms
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  damh.smo.uhi.ac.uk (194.35.194.231)  59.328 ms  59.155 ms  59.126 ms
[Duo2 ~]$

  ;)
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Weaver

  • Kitizen
  • ****
  • Posts: 4680
  • Retd sw dev; A&A; 3 7km ADSL2; IPv6; Firebrick
Re: I can't get to 194.35.194.231 [edit: My misinterpretation]
« Reply #4 on: May 11, 2018, 06:30:35 PM »

I did try from a completely different starting point, somewhere maybe in Germany I think, using an online ping and traceroute service and just the same. So it has to be them being antisocial or paranoid.

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anything