Routing problem, some websites not accessible

Question

Level 1

4 points

Routing problem, some websites not accessible

Hi,

Having strange problem with Mac Pro (early 2008) accessing Internet over wifi (and otherwise as well). Most sites work fine, trouble is with www.gmail.com, http://picasa.google.com/ and www.youtube.com. Gmail and Picassa give error: 'Firefox can't establish a connection to the server at picasa.google.com.'. e.g. www.google.com works just fine like most sites. Youtube connects but loses most images and videos are not shown.
I have Macbook Pro running same 10.5.2 Leopard that uses same wireless router to connect to Internet and Gmail, Picassa and Youtube work just fine.

Troubleshoothing done so far:
-Reboot of everything including router, no help.
-Installed new 3.0 Firefox, no help, also Safari fails same way with above sites
-Connected to ISP using ethernet cable directly to router, no help
-Run Onyx and cleaned all caches, helped a bit, now www.gmail.com can be pinged, before it show 'no route to host'. Also traceroute completes. But still 'Safari can’t open the page “ http://mail.google.com/mail/?hl=fi&tab=wm” because it could not connect to the server “mail.google.com”.'
- sudo route flush, completes with error and kills some daemon so afterward no connection anymore but needs reboot to get daemon up.

ping wwww.gmail.com on Mac Pro
PING wwww.gmail.com (208.67.219.132): 56 data bytes
64 bytes from 208.67.219.132: icmp_seq=0 ttl=49 time=300.638 ms
64 bytes from 208.67.219.132: icmp_seq=1 ttl=49 time=289.377 ms

Traceroute on Mac Pro:
tero-macpro:~ Tero$ traceroute wwww.gmail.com
traceroute to wwww.gmail.com (208.67.219.132), 64 hops max, 40 byte packets
1 192.168.1.1 (192.168.1.1) 1.252 ms 0.673 ms 0.826 ms
2 91.74.51.1 (91.74.51.1) 0.999 ms 0.973 ms 0.850 ms
3 10.25.88.13 (10.25.88.13) 1.495 ms 3.088 ms 1.424 ms
4 10.25.95.2 (10.25.95.2) 1.223 ms 1.149 ms 1.108 ms
5 10.25.31.17 (10.25.31.17) 1.169 ms 1.077 ms 1.059 ms
6 10.0.7.2 (10.0.7.2) 2.701 ms 3.021 ms 3.432 ms
7 80.227.0.78 (80.227.0.78) 4.040 ms 3.509 ms 3.781 ms
8 80.227.0.65 (80.227.0.65) 3.730 ms 3.373 ms 3.046 ms
9 * * *
10 * * *
11 * * *
12 * * *
13 195.66.226.185 (195.66.226.185) 149.822 ms 150.803 ms 149.509 ms
14 te2-1.3493.mpd02.***01.atlas.cogentco.com (130.117.2.18) 139.322 ms te7-3.mpd02.***01.atlas.cogentco.com (130.117.2.26) 149.686 ms 130.117.3.226 (130.117.3.226) 149.397 ms
15 te4-4.ccr02.bos01.atlas.cogentco.com (130.117.0.46) 237.411 ms 226.090 ms *
16 te3-2.ccr02.ord01.atlas.cogentco.com (154.54.6.182) 259.420 ms * *
17 te9-4.ccr02.mci01.atlas.cogentco.com (154.54.6.214) 260.825 ms te4-3.ccr02.mci01.atlas.cogentco.com (154.54.6.201) 269.266 ms *
18 te2-2.ccr02.sfo01.atlas.cogentco.com (154.54.6.42) 294.322 ms 304.292 ms 294.355 ms
19 te4-4.mpd01.sjc04.atlas.cogentco.com (154.54.7.174) 304.700 ms te2-4.mpd01.sfo01.atlas.cogentco.com (154.54.24.105) 308.892 ms te4-4.mpd01.sjc04.atlas.cogentco.com (154.54.7.174) 304.829 ms
20 vl3490.mpd01.sjc04.atlas.cogentco.com (154.54.2.166) 310.067 ms 38.104.140.46 (38.104.140.46) 286.911 ms 296.650 ms
21 * 38.104.140.46 (38.104.140.46) 290.994 ms *
22 * * *
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64 * * *

With Macbook Pro that can access www.gmail.com. traceroute:
tero-macbookpro:~ teroahonen$ traceroute www.gmail.com
traceroute: Warning: www.gmail.com has multiple addresses; using 74.125.19.83
traceroute to googlemail.l.google.com (74.125.19.83), 64 hops max, 40
byte packets
1 192.168.1.1 (192.168.1.1) 1.447 ms 0.857 ms 0.880 ms
2 91.74.51.1 (91.74.51.1) 1.191 ms 1.155 ms 1.132 ms
3 10.25.88.13 (10.25.88.13) 2.154 ms 1.584 ms 1.588 ms
4 10.25.95.2 (10.25.95.2) 1.507 ms 1.447 ms 1.334 ms
5 10.25.31.17 (10.25.31.17) 1.374 ms 1.384 ms 1.301 ms
6 10.0.7.1 (10.0.7.1) 2.397 ms 2.183 ms 1.930 ms
7 80.227.0.234 (80.227.0.234) 3.863 ms 3.992 ms 3.730 ms
8 80.227.0.217 (80.227.0.217) 4.692 ms 3.984 ms 3.895 ms
9 195.229.27.9 (195.229.27.9) 6.597 ms * 6.399 ms
10 csk012.emirates.net.ae (195.229.31.12) 15.391 ms 14.768 ms 14.269 ms
11 195.229.1.206 (195.229.1.206) 133.584 ms 133.576 ms 133.402 ms
12 de-cix10.net.google.com (80.81.192.108) 189.684 ms 149.807 ms 165.401 ms
13 209.85.255.172 (209.85.255.172) 141.587 ms 141.543 ms
209.85.255.170 (209.85.255.170) 140.793 ms
14 72.14.233.104 (72.14.233.104) 143.913 ms 72.14.232.105
(72.14.232.105) 145.197 ms 144.879 ms
15 72.14.236.220 (72.14.236.220) 210.696 ms 209.352 ms 209.917 ms
16 209.85.248.216 (209.85.248.216) 222.078 ms 214.374 ms 214.615 ms
17 216.239.48.69 (216.239.48.69) 231.131 ms 229.650 ms 229.012 ms
18 72.14.239.136 (72.14.239.136) 229.673 ms 229.069 ms 230.865 ms
19 66.249.95.213 (66.249.95.213) 283.888 ms 285.395 ms 287.365 ms
20 209.85.251.34 (209.85.251.34) 285.576 ms 284.834 ms 288.219 ms
21 209.85.251.94 (209.85.251.94) 285.547 ms 294.946 ms 289.840 ms
22 cf-in-f83.google.com (74.125.19.83) 287.743 ms 289.068 ms 289.342 ms

Ideas very welcome.
I have also a MacMini connected with cable to router running Tiger with no troubles in connection to Internet as well as IBM laptop with XP and no problems using wifi.

Thanks,

--
Tero

Mac Pro early 2008, Macbook pro 2007, Mac Mini 1.66Mhz, Mac OS X (10.5.2), Asus WL500 wireless router

Posted on May 23, 2008 10:30 PM

Reply

Answer 1

May 24, 2008 3:37 AM in response to Karpo

Welcome to Apple Discussions Karpo.

I remember reading that some sites require Adobe Flash plug-ins installed to be able to access them. If you haven't installed this, download it from the Adobe site and instal it. Use Disk Utility to repair permissions after the installation as Adobe installations mess with permissions.

Let's know if this solves your problem.

Neville

Reply

Answer 2

Karpo Author

Level 1

4 points

May 24, 2008 5:41 AM in response to Neville Mayfield

Thanks for suggestion, but www.gmail.com don't require flash. Also flash sites like: http://www.liveleak.com work just fine and videos play as well (Flash 9 seems to be installed). Firefox and Safari give similar errors on Gmail:

Failed to Connect

Firefox can't establish a connection to the server at www.gmail.com.

Though the site seems valid, the browser was unable to establish a connection.

* Could the site be temporarily unavailable? Try again later.
* Are you unable to browse other sites? Check the computer's network connection.
* Is your computer or network protected by a firewall or proxy? Incorrect settings can interfere with Web browsing.

Reply

Answer 3

Karpo Author

Level 1

4 points

May 24, 2008 5:46 AM in response to Karpo

Ups, noticed that I pinged and Tracerouted site wwww.gmail.com (4xW) instead of proper www.gmail.com address. So there is no route to www.gmail.com:

tero-macpro:~ Tero$ traceroute www.gmail.com
traceroute: Warning: www.gmail.com has multiple addresses; using 74.125.19.17
traceroute to googlemail.l.google.com (74.125.19.17), 64 hops max, 40 byte packets
traceroute: sendto: No route to host
1 traceroute: wrote googlemail.l.google.com 40 chars, ret=-1
^C
tero-macpro:~ Tero$ ping www.gmail.com
PING googlemail.l.google.com (74.125.19.17): 56 data bytes
ping: sendto: No route to host
ping: sendto: No route to host

Reply

Answer 4

May 24, 2008 6:41 PM in response to Karpo

I was immediately redirected to Google for access to gmail when I just tried but login came up almost immediately.

https://www.google.com/accounts/ServiceLogin?service=mail&passive=true&rm=false& continue=https%3A%2F%2Fmail.google.com%2Fmail%2F%3Fnsr%3D1%26ui%3Dhtml%26zy%3Dl& bsv=1k96igf4806cy&ltmpl=default&ltmplcache=2

Is this what you want to achieve?

Neville

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Answer 5

May 24, 2008 7:57 PM in response to Karpo

Are you connecting through a router? If your router connects to your ISP using DHCP you may need to have the router renew the DHCP lease. Some times IP addresses are flagged by some sites and not allowed in because at some time the IP address was used by some one for mischief. And then you got it.

Also if you are using a router, check the manufacturers page for a Firmware update.

Reply

Answer 6

Karpo Author

Level 1

4 points

May 25, 2008 7:24 PM in response to George Larsen

Yes, using a wireless router. I did reboot router earlier, got new IP, no difference. Other two Macs using same router do connect sites just fine (and they have same IP towards Internet). Connecting without Router directly don't change situation either.

Reply

Answer 7

Karpo Author

Level 1

4 points

May 25, 2008 7:28 PM in response to Neville Mayfield

Not really. When I type 'ping www.gmail.com' to terminal response is 'No route to host'. When typing www.gmail.com to any browser, I get same 'No route to host' error message.

There is no connection to certain sites. I am pretty sure that Leopards internal routing table is somehow corrupted but don't know how to clear it, reboot won't do the trick. For Tiger one could use Applejack software I have found out, but it don't work for Leopard.
I suppose reinstall is only way to get this Mac alive again.

Reply

Answer 8

May 25, 2008 8:11 PM in response to Karpo

Can I suggest another approach before doing a system re-instal.

Go to the Libraries, /Library/... and /user/Library/... and remove the preferences in particular relating to internet, safari and network. These will be the files that end .plist and have one of these 3 words as part of the name. The computer will re-create new preference files and you will need to re-establish your own settings for these. If you do them one by one and test whether the problem has gone you could eventually find the culprit - if any of these have become corrupted. There are other files that may contain corrupted info eg in the caches in the Libraries. I could only see a few that might be relevant.

Neville

Reply

Answer 9

Karpo Author

Level 1

4 points

May 27, 2008 11:32 PM in response to Neville Mayfield

Thanks for suggestion, I deleted etwork.plist nternet.plist and afari.plist on both Libraries but it didn't sadly change situation.

I don't have currently any cables on either of Ethernet jacks. I think situation started when I was swapping cable going to ADSL back and forth between two ports on back of the Mac Pro. I tried to disable both jacks but it does not change situation. Also found way to flush routing table 'dscacheutil -flushcache' but it dind't change situation either. Still cannot even ping www.gmail.com, result is 'no route to host'. ping www.google.com works fine. No route to www.yahoo.com either (and webpage not displayed either).

Have to play bit more with those Ethernet jacks, maybe pluggin something in will change situation

Reply

Answer 10

Karpo Author

Level 1

4 points

May 29, 2008 7:44 AM in response to Karpo

Btw, upgraded to 10.5.3, no help on the issue

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Answer 11

Dogcow-Moof

Level 8

36,833 points

May 29, 2008 8:08 AM in response to Karpo

I'm assuming you can reach some sites, correct?

If so, please post the output of the following command run in a Terminal window:

netstat -nr

Reply

Answer 12

RK812

Level 1

0 points

May 29, 2008 4:27 PM in response to Dogcow-Moof

Hi all,

I have the same problem: two MacBooks and one MacBook Pro tested in two wi-fi networks. Both MacBooks don't have access to some websites (apple.com, cnn.com; gmail.com does open) at home via AirPort. Safari and Opera can't reach them. Using IP address instead of domain name does not help. Dreamweaver can't reach some sites ftp. Running Software Update via AirPort failed (no connection). At the same time all web sites are accessible via Ethernet cable. Updating to 10.5.3 (via Ethernet) didn't solve the problem.
The same two MacBooks access all web sites via AirPort in the office network (both office and home use Asus WL-500gP routers). I tried connecting a DLink access point to the home router, used AirPort via DLink and played with wireless settings but it didn't help.
The MacBook Pro works fine both at home and in the office.

I see discussion threads on Safari more than likely related to the problem being discussed here:
http://discussions.apple.com/thread.jspa?threadID=1536056&tstart=15

I run netstat -nr on MacBook and MacBook Pro in the home network. The outputs are below:

MacBook - with the problem:

MacBook-Nastya:~ Nastya$ netstat -nr
Routing tables

Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.1.1 UGSc 27 27 en1
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 1 2 lo0
169.254 link#5 UCS 0 0 en1
192.168.1 link#5 UCS 3 0 en1
192.168.1.1 0:18:f3:98:dc:fb UHLW 29 33 en1 1184
192.168.1.10 0:19:e3:6:a2:96 UHLW 0 6 en1 279
192.168.1.30 127.0.0.1 UHS 0 18 lo0
192.168.1.255 link#5 UHLWb 1 83 en1

Internet6:
Destination Gateway Flags Netif Expire
::1 link#1 UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#1 UHL lo0
ff01::/32 ::1 U lo0
ff02::/32 fe80::1%lo0 UC lo0
_____
MacBook Pro - no problem:

RK-MacWin:~ RK$ netstat -nr
Routing tables

Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.1.1 UGSc 278 10 en1
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 2 1500 lo0
169.254 link#6 UCS 0 0 en1
172.16.62/24 link#8 UC 0 0 vmnet1
172.16.211/24 link#7 UC 0 0 vmnet8
192.168.1 link#6 UCS 2 0 en1
192.168.1.1 0:18:f3:98:dc:fb UHLW 184 32 en1 1159
192.168.1.10 127.0.0.1 UHS 0 0 lo0
192.168.1.30 0:1e:52:84:62:22 UHLW 0 3 en1 183

Internet6:
Destination Gateway Flags Netif Expire
::1 link#1 UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#1 UHL lo0
ff01::/32 ::1 U lo0
ff02::/32 fe80::1%lo0 UC lo0

Reply

Answer 13

Karpo Author

Level 1

4 points

May 30, 2008 12:19 AM in response to Dogcow-Moof

Yes, many sites are accessible, like this forum, I am posting from troublesome Mac Pro this message as well.

Netstat:
tero-macpro:~ Tero$ netstat -nr
Routing tables

Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.1.1 UGSc 92 123158 en2
127 127.0.0.1 UCS 0 0 lo0
127.0.0.1 127.0.0.1 UH 1 2 lo0
169.254 link#6 UCS 0 0 en2
192.168.1 link#6 UCS 3 0 en2
192.168.1.1 0:17:31:fa:67:a2 UHLW 92 41200 en2 1129
192.168.1.40 127.0.0.1 UHS 0 1797 lo0
192.168.1.50 0:1c:b3:c5:9f:1 UHLW 0 0 en2 541

Internet6:
Destination Gateway Flags Netif Expire
::1 link#1 UHL lo0
fe80::%lo0/64 fe80::1%lo0 Uc lo0
fe80::1%lo0 link#1 UHL lo0
ff01::/32 ::1 U lo0
ff02::/32 fe80::1%lo0 UC lo0
tero-macpro:~ Tero$

My Routers address is 192.168.1.1, using wifi as access and IP address of Mac is 192.168.1.40 (fixed from Router)

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Answer 14

Dogcow-Moof

Level 8

36,833 points

May 30, 2008 9:59 PM in response to Karpo

This actually looks more like a misconfiguration out in the Internet rather than a problem with your system per se as packets are making it out into the world then getting lost or otherwise misdirected.

One other question - do you know your ISP required you to register your MAC address with them before getting service?

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Answer 15

RK812

Level 1

0 points

May 31, 2008 12:32 AM in response to Dogcow-Moof

Yes, the ISP of the troublesome home network requires registering MAC address of the router. The ISP at work (all works fine there) does not.

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