Broadband Related > Known Network Issues + MSO's
I can't get to 194.35.194.231 [edit: My misinterpretation]
Weaver:
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
d2d4j:
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.
Weaver:
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.
burakkucat:
Looking from a slightly different angle --
--- Code: ---[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 ~]$
--- End code ---
;)
Weaver:
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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