[UCIMC-Tech] Re: Gmail problems
Barry Isralewitz
barryi at ks.uiuc.edu
Thu Jun 26 22:19:49 CDT 2008
Hi Stuart,
Interspersed with quoting your email, some results below of running netstat and traceroute and more on the Bike Project computer.
On Tue, May 06, 2008 at 02:37:48PM -0500, Stuart Levy wrote:
> On Tue, May 06, 2008 at 02:10:48PM -0500, Barry Isralewitz wrote:
> > Hi,
> >
> > On Tue, May 06, 2008 at 01:41:37PM -0500, Bob Illyes wrote:
> > > Joy uses gmail without problem, but gmail doesn't work from the Print Mac,
> > > which has an old OS and browser for arcane reasons. Gmail seems to be picky
> > > about browsers, and the issue in the Bike Projet may be an old browser
> > > rather than the UCIMC web service. Print doesn't have any problem with
> > > Google itself, though, last time I checked.
> >
> > Thanks for the info.
> >
> > To clarify problem I see in Bike Project computer: the trouble seems to be
> > with establishing any communication at all with with google.com and/or
> > gmail.com; so this seems more of a routing/adressing issue than a browser-
> > compaitiblity issue. (To be positive, I'll try pings from/to different places
> > when I'm next in the shop.) The Firefox browser version on Bike Project's BSD
> > computer is modern enough; it renders gmail and google pages quickly and
> > accurately during some periods (i.e. when communication apparently going
> > well.) Also, the http://google.com default page is very simple, about any
> > browser around can render it at least somewhat well.
> >
> > Hmm... I'm recalling now I had the same problem last week -- periods when
> > could not contact google.com but could contact all other distant websites -- on
> > my laptop when connected to OpenIMC in the room 24. (Have latest, stable
> > browser versions on my laptop.)
> >
> > Demonstrate problem with Firefox:
> > a) enter 'google.com' into address bar, get animated 'busy' icon
> > b) while a) continues, open a new tab. enter yahoo.com. page is quickly displayed.
> > c) close tab from a) (it is still 'busy'.
> > d) open new tab. try google.com again. Another 'busy' icon
> > e) enter "newyorktimes.com". Page is quickly displayed. The google pages continue to display 'busy' icons. In some cases, the google pges will appear a few minutes later, sometimes not.
>
> It'd be interesting to open a terminal window (xterm or whatever)
> while this is going on, and type
>
> netstat -tf inet
>
> and note the output.
Here I have one Firefox tab Firefox open, with a google attempt a couple of minutes, and another tab with a google contact in the process of failing.
bash2-2.05b$ netstat -tf inet
Active Internet connections
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp4 0 392 192.168.42.106.53676 od-in-f83.google.http ESTABLISHED
tcp4 0 0 192.168.42.106.61635 209.62.185.9.http ESTABLISHED
tcp4 0 0 192.168.42.106.59502 204.2.228.81.http ESTABLISHED
tcp4 0 0 192.168.42.106.56346 128.242.191.49.http ESTABLISHED
tcp4 0 0 192.168.42.106.49924 winnipeg.ks.uiuc.ssh ESTABLISHED
tcp4 0 0 192.168.42.106.49986 winnipeg.ks.uiuc.ssh ESTABLISHED
Pretty much sites but google.com, gmail.com, and other Google sites go through. Some non-google sites have Google-dependent parts, these load partially, then freeze up displaying messages about loading these -- say www.google-analytics.com or googlesyndication.com addresses.
There'll be a line for every active TCP connection.
> Do you see a line like
>
>
> tcp4 0 224 192.168.11.11.55390 <something>.google.com.http SYN_SENT
>
> ? The "SYN_SENT" would be the important thing -- it'd mean that
> packets were being sent to google but no acknowledgement was reaching you.
> This would be a way of showing that it's a network-level problem,
> not e.g. a name resolution problem.
>
> It would also be interesting to "traceroute" to google.com at a troublesome time,
> and see how far it gets.
Here are some traceroutes and pings I ran last week on the Bike Project computer with a few notes interspersed. Note that the traceroutes to google are clearly diffrent different from traceroutes to uiuc.edu and yahoo.com.
====
2008-Jun-19 09:21:46 AM (CDT)
--
whasmyip.org says we are 75.145.177.73
Note: clock is misset....
bash2-2.05b$ date -u
Thu Jun 19 21:22:45 UTC 2008
note:At 10:24 AM June 19 chicago time
--
bash2-2.05b$ uname -a
FreeBSD 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Tue Jan 10 23:42:31 CST 2006 kaduk@:/usr/obj/usr/src/sys/PROLIX i386
---
--
bash2-2.05b$ date;traceroute www.uiuc.edu;date
Thu Jun 19 15:19:21 CDT 2008
traceroute to swan29.admin.uiuc.edu (128.174.254.29), 64 hops max, 40 byte packets
1 192.168.42.1 (192.168.42.1) 1.888 ms 0.901 ms 0.829 ms
2 * * *
3 ge-1-2-ur01.champaign.il.chicago.comcast.net (68.85.178.65) 9.347 ms 9.595 ms 12.543 ms
4 pos-0-11-0-0-ar01.indianapolis.in.indiana.comcast.net (68.86.90.170) 21.972 ms 16.036 ms 15.775 ms
5 pos-0-1-0-0-cr01.nashville.tn.ibone.comcast.net (68.86.90.169) 25.179 ms 31.886 ms 27.784 ms
6 pos-0-12-0-0-cr01.newyork.ny.ibone.comcast.net (68.86.85.21) 40.192 ms 40.884 ms 47.968 ms
7 68.86.85.137 (68.86.85.137) 76.245 ms 77.168 ms 76.228 ms
8 te-1-1-pr01.600wseventh.ca.ibone.comcast.net (68.86.84.130) 76.682 ms 74.434 ms 76.721 ms
9 68.86.89.158 (68.86.89.158) 234.557 ms 184.015 ms 230.299 ms
10 vl3492.mpd01.lax01.atlas.cogentco.com (154.54.3.9) 98.143 ms
vl3493.mpd01.lax01.atlas.cogentco.com (154.54.6.229) 74.178 ms
vl3492.mpd01.lax01.atlas.cogentco.com (154.54.3.9) 73.726 ms
11 te3-1.mpd01.sjc01.atlas.cogentco.com (154.54.5.181) 84.512 ms 89.169 ms 111.431 ms
12 te3-3.mpd01.sfo01.atlas.cogentco.com (154.54.6.133) 88.699 ms 87.053 ms 85.278 ms
13 te4-1.mpd01.mci01.atlas.cogentco.com (154.54.6.33) 120.869 ms 172.868 ms 122.139 ms
14 *
te4-3.mpd01.ord01.atlas.cogentco.com (66.28.4.186) 288.273 ms *
15 vl3605.na31.b002329-4.ord01.atlas.cogentco.com (38.20.36.178) 118.772 ms 119.233 ms 124.766 ms
16 university-of-illinios-urbana.demarc.cogentco.com (38.104.99.42) 79.229 ms 77.604 ms 80.115 ms
17 t-ur2rtr.ix.ui-iccn.org (72.36.126.101) 82.734 ms 84.086 ms 82.708 ms
18 iccn-ur2rtr-uiuc2.gw.uiuc.edu (72.36.127.6) 80.092 ms 80.648 ms 83.994 ms
19 t-exiteb.gw.uiuc.edu (130.126.0.73) 91.742 ms 82.852 ms 80.989 ms
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
31 * * *
32 * * *
33 * * *
34 * * *
35 * * *
36 * * *
37 * * *
38 * * *
39 * * *
40 * * *
41 * * *
42 * * *
43 * * *
44 * * *
45 * * *
46 * * *
47 * * *
48 * * *
49 * * *
50 * * *
51 * * *
52 *
Thu Jun 19 15:28:17 CDT 2008
time = 9:30 am
=======================
sh2-2.05b$ date;traceroute yahoo.com;date
Thu Jun 19 15:29:23 CDT 2008
traceroute: Warning: yahoo.com has multiple addresses; using 68.180.206.184
traceroute to yahoo.com (68.180.206.184), 64 hops max, 40 byte packets
1 192.168.42.1 (192.168.42.1) 1.139 ms 0.918 ms 0.816 ms
2 * * *
3 ge-1-2-ur01.champaign.il.chicago.comcast.net (68.85.178.65) 8.969 ms 9.102 ms 9.296 ms
4 pos-0-11-0-0-ar01.indianapolis.in.indiana.comcast.net (68.86.90.170) 21.770 ms 18.800 ms 17.057 ms
5 pos-0-1-0-0-cr01.nashville.tn.ibone.comcast.net (68.86.90.169) 25.159 ms 26.459 ms 25.407 ms
6 pos-0-5-0-0-cr01.atlanta.ga.ibone.comcast.net (68.86.85.66) 32.740 ms 40.511 ms 33.817 ms
7 *
te-4-4.car1.Atlanta2.Level3.net (4.71.252.13) 42.774 ms 41.573 ms
8 ae-71-52.ebr1.Atlanta2.Level3.net (4.68.103.60) 43.645 ms 43.071 ms 35.926 ms
9 ae-73-70.ebr3.Atlanta2.Level3.net (4.69.138.20) 38.925 ms 46.805 ms 54.537 ms
10 ae-7.ebr3.Dallas1.Level3.net (4.69.134.21) 47.758 ms 50.175 ms 53.953 ms
11 ae-3.ebr2.LosAngeles1.Level3.net (4.69.132.77) 90.452 ms 78.928 ms 84.395 ms
12 ae-72-72.csw2.LosAngeles1.Level3.net (4.69.137.22) 87.406 ms * 88.364 ms
13 ae-63-63.ebr3.LosAngeles1.Level3.net (4.69.137.33) 78.810 ms 86.329 ms 91.813 ms
14 ae-2.ebr3.SanJose1.Level3.net (4.69.132.9) 84.292 ms 88.344 ms 90.424 ms
15 ae-73-73.csw2.SanJose1.Level3.net (4.69.134.230) 84.842 ms
ae-93-93.csw4.SanJose1.Level3.net (4.69.134.238) 88.823 ms
ae-83-83.csw3.SanJose1.Level3.net (4.69.134.234) 83.674 ms
16 ae-23-79.car3.SanJose1.Level3.net (4.68.18.69) 86.193 ms
ae-43-99.car3.SanJose1.Level3.net (4.68.18.197) 98.863 ms
ae-23-79.car3.SanJose1.Level3.net (4.68.18.69) 214.310 ms
17 4.71.112.14 (4.71.112.14) 90.279 ms 90.228 ms 89.510 ms
18 ae1-p161.msr1.sp1.yahoo.com (216.115.107.63) 90.759 ms
ae1-p171.msr2.sp1.yahoo.com (216.115.107.87) 90.610 ms
ae0-p171.msr2.sp1.yahoo.com (216.115.107.83) 88.891 ms
19 te-8-1.bas-a2.sp1.yahoo.com (209.131.32.19) 90.982 ms
te-9-1.bas-a1.sp1.yahoo.com (209.131.32.21) 90.635 ms
te-8-1.bas-a1.sp1.yahoo.com (209.131.32.17) 90.110 ms
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
31 * * *
32 * * *
33 * * *
34 * * *
35 * * *
36 * * *
37 * * *
38 * * *
39 * * *
40 * * *
41 * * *
42 * * *
43 * * *
44 * * *
45 * * *
46 * * *
47 * * *
48 * * *
49 * * *
50 * * *
51 * * *
52 * * *
53 * * *
54 * * *
55 * * *
56 * * *
57 * * *
58 * * *
59 * * *
60 * * *
61 * * *
62 * * *
63 * * *
64 * * *
Thu Jun 19 15:41:08 CDT 2008
=======
ash2-2.05b$ date;traceroute google.com;date
Thu Jun 19 16:36:09 CDT 2008
traceroute: Warning: google.com has multiple addresses; using 64.233.167.99
traceroute to google.com (64.233.167.99), 64 hops max, 40 byte packets
1 192.168.42.1 (192.168.42.1) 3.941 ms 6.835 ms 3.111 ms
2 * * *
3 ge-1-2-ur01.champaign.il.chicago.comcast.net (68.85.178.65) 8.422 ms 7.143 ms 9.784 ms
4 pos-0-11-0-0-ar01.indianapolis.in.indiana.comcast.net (68.86.90.170) 20.564 ms 17.295 ms 16.990 ms
5 pos-0-1-0-0-cr01.nashville.tn.ibone.comcast.net (68.86.90.169) 27.575 ms 26.328 ms 31.989 ms
6 pos-0-5-0-0-cr01.atlanta.ga.ibone.comcast.net (68.86.85.66) 32.472 ms 34.752 ms 33.793 ms
7 te-4-3.car1.Atlanta2.Level3.net (4.71.252.25) 37.362 ms 33.989 ms 34.209 ms
8 ae-63-51.ebr3.Atlanta2.Level3.net (4.68.103.30) 32.028 ms 33.186 ms 34.873 ms
9 ae-72-70.ebr2.Atlanta2.Level3.net (4.69.138.19) 39.361 ms
ae-62-60.ebr2.Atlanta2.Level3.net (4.69.138.3) 35.932 ms
ae-72-70.ebr2.Atlanta2.Level3.net (4.69.138.19) 47.590 ms
10 ae-3.ebr2.Chicago1.Level3.net (4.69.132.73) 37.396 ms 49.094 ms 36.569 ms
11 ae-21-56.car1.Chicago1.Level3.net (4.68.101.162) 38.945 ms
ae-21-52.car1.Chicago1.Level3.net (4.68.101.34) 40.676 ms 38.025 ms
12 *
GOOGLE-INC.car1.Chicago1.Level3.net (4.79.208.18) 45.265 ms 45.227 ms
13 72.14.232.53 (72.14.232.53) 38.219 ms
66.249.94.133 (66.249.94.133) 38.033 ms 40.504 ms
14 72.14.232.74 (72.14.232.74) 45.250 ms
64.233.175.42 (64.233.175.42) 39.700 ms
72.14.232.74 (72.14.232.74) 44.323 ms
15 py-in-f99.google.com (64.233.167.99) 42.799 ms 40.262 ms 40.371 ms
Thu Jun 19 16:36:31 CDT 2008
-----
Second try to Google
bash2-2.05b$ date;traceroute google.com;date
Thu Jun 19 16:36:09 CDT 2008
traceroute: Warning: google.com has multiple addresses; using 64.233.167.99
traceroute to google.com (64.233.167.99), 64 hops max, 40 byte packets
1 192.168.42.1 (192.168.42.1) 3.941 ms 6.835 ms 3.111 ms
2 * * *
3 ge-1-2-ur01.champaign.il.chicago.comcast.net (68.85.178.65) 8.422 ms 7.143 ms 9.784 ms
4 pos-0-11-0-0-ar01.indianapolis.in.indiana.comcast.net (68.86.90.170) 20.564 ms 17.295 ms 16.990 ms
5 pos-0-1-0-0-cr01.nashville.tn.ibone.comcast.net (68.86.90.169) 27.575 ms 26.328 ms 31.989 ms
6 pos-0-5-0-0-cr01.atlanta.ga.ibone.comcast.net (68.86.85.66) 32.472 ms 34.752 ms 33.793 ms
7 te-4-3.car1.Atlanta2.Level3.net (4.71.252.25) 37.362 ms 33.989 ms 34.209 ms
8 ae-63-51.ebr3.Atlanta2.Level3.net (4.68.103.30) 32.028 ms 33.186 ms 34.873 ms
9 ae-72-70.ebr2.Atlanta2.Level3.net (4.69.138.19) 39.361 ms
ae-62-60.ebr2.Atlanta2.Level3.net (4.69.138.3) 35.932 ms
ae-72-70.ebr2.Atlanta2.Level3.net (4.69.138.19) 47.590 ms
10 ae-3.ebr2.Chicago1.Level3.net (4.69.132.73) 37.396 ms 49.094 ms 36.569 ms
11 ae-21-56.car1.Chicago1.Level3.net (4.68.101.162) 38.945 ms
ae-21-52.car1.Chicago1.Level3.net (4.68.101.34) 40.676 ms 38.025 ms
12 *
GOOGLE-INC.car1.Chicago1.Level3.net (4.79.208.18) 45.265 ms 45.227 ms
13 72.14.232.53 (72.14.232.53) 38.219 ms
66.249.94.133 (66.249.94.133) 38.033 ms 40.504 ms
14 72.14.232.74 (72.14.232.74) 45.250 ms
64.233.175.42 (64.233.175.42) 39.700 ms
72.14.232.74 (72.14.232.74) 44.323 ms
15 py-in-f99.google.com (64.233.167.99) 42.799 ms 40.262 ms 40.371 ms
Thu Jun 19 16:36:31 CDT 2008
------
Pings
(stopped UIUC ones quickly, am in hurry)
bash2-2.05b$ uname
FreeBSD
bash2-2.05b$ ping google.com
PING google.com (72.14.207.99): 56 data bytes
64 bytes from 72.14.207.99: icmp_seq=0 ttl=242 time=55.199 ms
64 bytes from 72.14.207.99: icmp_seq=1 ttl=242 time=56.382 ms
^C
--- google.com ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 55.199/55.790/56.382/0.592 ms
bash2-2.05b$ ping yahoo.com
PING yahoo.com (68.180.206.184): 56 data bytes
64 bytes from 68.180.206.184: icmp_seq=0 ttl=52 time=89.973 ms
64 bytes from 68.180.206.184: icmp_seq=1 ttl=52 time=104.619 ms
64 bytes from 68.180.206.184: icmp_seq=2 ttl=52 time=89.305 ms
64 bytes from 68.180.206.184: icmp_seq=3 ttl=52 time=90.078 ms
^C
--- yahoo.com ping statistics ---
4 packets transmitted, 4 packets received, 0% packet loss
round-trip min/avg/max/stddev = 89.305/93.494/104.619/6.430 ms
bash2-2.05b$ ping uiuc.edu
PING uiuc.edu (128.174.254.29): 56 data bytes
^C
--- uiuc.edu ping statistics ---
4 packets transmitted, 0 packets received, 100% packet loss
bash2-2.05b$ ping www.uiuc.edu
PING swan29.admin.uiuc.edu (128.174.254.29): 56 data bytes
^C
--- swan29.admin.uiuc.edu ping statistics ---
7 packets transmitted, 0 packets received, 100% packet loss
bash2-2.05b$ ping login.ks.uiuc.edu
PING winnipeg.ks.uiuc.edu (130.126.120.41): 56 data bytes
^C
--- winnipeg.ks.uiuc.edu ping statistics ---
13 packets transmitted, 0 packets received, 100% packet loss
bash2-2.05b$ ping www.beckman.uiuc.edu
PING bi-www1.beckman.uiuc.edu (130.126.116.250): 56 data bytes
^C
--- bi-www1.beckman.uiuc.edu ping statistics ---
6 packets transmitted, 0 packets received, 100% packet loss
bash2-2.05b$ date
Thu Jun 19 16:39:33 CDT 2008
bash2-2.05b$
---
Thanks for any insight you can provide.
Cheers,
Barry
> Here's what I get from zeco to google.com now (2:40pm Tue):
>
>
> [slevy at zeco ~]$ traceroute www.google.com
> traceroute: Warning: www.google.com has multiple addresses; using 64.233.169.99
> traceroute to www.l.google.com (64.233.169.99), 64 hops max, 40 byte packets
> 1 192.168.11.1 (192.168.11.1) 0.366 ms 0.519 ms 0.463 ms
> 2 * * *
> 3 ge-1-2-ur01.champaign.il.chicago.comcast.net (68.85.178.65) 13.067 ms 14.257 ms 18.691 ms
> 4 pos-0-10-0-0-ar01.indianapolis.in.indiana.comcast.net (68.86.90.174) 15.016 ms 20.180 ms 21.873 ms
> 5 pos-0-0-0-0-cr01.nashville.tn.ibone.comcast.net (68.86.90.173) 28.347 ms 25.456 ms 32.600 ms
> 6 pos-0-5-0-0-cr01.atlanta.ga.ibone.comcast.net (68.86.85.66) 32.474 ms 39.619 ms 31.696 ms
> 7 te-9-1.car1.Atlanta2.Level3.net (4.71.252.29) 38.348 ms 233.805 ms 202.324 ms
> 8 ae-21-52.car1.Atlanta1.Level3.net (4.68.103.34) 32.476 ms 34.408 ms 34.820 ms
> 9 GOOGLE-INC.car1.Atlanta1.Level3.net (4.78.209.194) 35.161 ms 39.392 ms 42.619 ms
> 10 209.85.254.188 (209.85.254.188) 59.483 ms 45.657 ms 65.054 ms
> 11 72.14.238.137 (72.14.238.137) 51.222 ms
> 72.14.238.139 (72.14.238.139) 54.197 ms
> 72.14.238.137 (72.14.238.137) 52.119 ms
> 12 64.233.175.169 (64.233.175.169) 59.934 ms
> 64.233.175.109 (64.233.175.109) 46.281 ms
> 64.233.175.111 (64.233.175.111) 47.436 ms
> 13 216.239.49.149 (216.239.49.149) 50.079 ms
> 216.239.49.145 (216.239.49.145) 51.710 ms 50.709 ms
> 14 yo-in-f99.google.com (64.233.169.99) 48.751 ms 52.487 ms 52.077 ms
>
>
> > Cheers,
> >
> > Barry
> >
> > --
> > Barry Isralewitz Theoretical and Computational Biophysics Group, UIUC
> > Beckman 3043 Office Phone: (217) 244-1612 Home Phone: (217) 337-6364
> > email: barryi at ks.uiuc.edu http://www.ks.uiuc.edu/~barryi
> > _______________________________________________
> > IMC-Tech mailing list
> > IMC-Tech at lists.ucimc.org
> > http://lists.chambana.net/cgi-bin/listinfo/imc-tech
--
Barry Isralewitz, Ph. D. Theoretical and Computational Biophysics Group, UIUC
Beckman 3043 Office Phone: (217) 244-1612 Home Phone: (217) 337-6364
email: barryi at ks.uiuc.edu http://www.ks.uiuc.edu/~barryi
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