Mysterious network problem.

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Ayende Rahien

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Apr 17, 2004, 7:25:42 AM4/17/04
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I can't connect to my POP3 mail from my computer.
At first I thought that something is wrong with the server, but calling
the company verified that everything works.
On another computer, I can reach the server just fine, but from my
computer, nada.
The problem seems to be that I just can't reach the server, this is very
annoying because I can't reach my email, and I *know* that it works.
I shut-down the firewall, check my hosts file, called my ISP, and
nothing works.
Anything else *does* work, that is what is so annoying.
Please help me!

My network setup goes like this:
1> Local network connection - physical network card
2> Connection to cable modem - physical network card
3> The dialer to the cable modem - "dialup"

Thanks in advance,
Ayende Rahien

P.S.
Here is some debugging information:

C:\Documents and Settings\Ayende>tracert mail.ayende.com

Tracing route to mail.ayende.com [199.203.54.224]
over a maximum of 30 hops:

1 742 ms 704 ms 715 ms 213.8.255.156
2 * 370 ms 573 ms vlan10.msfc.jean.inter.net.il
[213.8.64.129]
3 * 803 ms 370 ms tun-125.nikita72.inter.net.il [213.8.8.125]
4 874 ms 674 ms 339 ms po.left.inter.net.il [192.117.180.145]
5 515 ms 678 ms 359 ms netvision-2-peering.silvia.inter.net.il
[213.8.6
4.212]
6 944 ms * 708 ms pos2-1.core2.hfa.nv.net.il [212.143.12.9]
7 636 ms 606 ms 236 ms gi1-1.srvc01.hfa.nv.net.il [212.143.8.7]
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
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.

C:\Documents and Settings\Ayende>ping mail.ayende.com

Pinging mail.ayende.com [199.203.54.224] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 199.203.54.224:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Documents and Settings\Ayende>telnet mail.ayende.com 110
Connecting To mail.ayende.com...Could not open connection to the host,
on port 1
10: Connect failed

C:\Documents and Settings\Ayende>nslookup
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.168.101.102: Timed out
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.168.101.101: Timed out
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.116.202.222: Timed out
DNS request timed out.
timeout was 2 seconds.
*** Can't find server name for address 192.116.192.9: Timed out
*** Default servers are not available
Default Server: UnKnown
Address: 192.168.101.102

> mail.ayende.com
Server: UnKnown
Address: 192.168.101.102

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out
> exit

C:\Documents and Settings\Ayende>ipconfig

Windows IP Configuration


Ethernet adapter Internet:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.24.201.233
Subnet Mask . . . . . . . . . . . : 255.255.224.0
Default Gateway . . . . . . . . . : 172.24.192.1

Ethernet adapter Local:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 192.168.0.1
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :

PPP adapter Internet Zahav AZTV Cables Dialer:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 213.8.171.57
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 213.8.171.57

Pegasus (MVP)

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Apr 17, 2004, 8:30:22 AM4/17/04
to

"Ayende Rahien" <Aye...@nospam.com> wrote in message
news:eBhRO7GJ...@TK2MSFTNGP11.phx.gbl...

Even though you say that you've turned off your firewall, you
probably still have some firewall active somewhere. I tried
your telnet command and was immediately successful.
Open up the PPP adapter status panel, then check if some
200 bytes are sent out when you run "telnet mail.ayende.com 110".
You could try some other POP3 server too, e.g.
"telnet mail.keypoint.com.au 110".


Ayende Rahien

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Apr 17, 2004, 8:44:09 AM4/17/04
to
Pegasus (MVP) wrote:

> "Ayende Rahien" <Aye...@nospam.com> wrote in message
> news:eBhRO7GJ...@TK2MSFTNGP11.phx.gbl...
>
>>I can't connect to my POP3 mail from my computer.
>>At first I thought that something is wrong with the server, but calling
>>the company verified that everything works.
>>On another computer, I can reach the server just fine, but from my
>>computer, nada.
>>The problem seems to be that I just can't reach the server, this is very
>>annoying because I can't reach my email, and I *know* that it works.
>>I shut-down the firewall, check my hosts file, called my ISP, and
>>nothing works.
>>Anything else *does* work, that is what is so annoying.
>>Please help me!

> Even though you say that you've turned off your firewall, you


> probably still have some firewall active somewhere. I tried
> your telnet command and was immediately successful.
> Open up the PPP adapter status panel, then check if some
> 200 bytes are sent out when you run "telnet mail.ayende.com 110".
> You could try some other POP3 server too, e.g.
> "telnet mail.keypoint.com.au 110".


This doesn't work either.
I tried from another computer in my network (that uses mine as a
gateway, and both my own and yours are working (nor on port: 25) ).
This computer is connected directly to the Internet, so there aren't any
other firewalls.
What is the PPP Adapter status panel?
My connection is L2TP IPSec VPN, not PPP

Pegasus (MVP)

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Apr 17, 2004, 9:18:05 AM4/17/04
to

"Ayende Rahien" <Aye...@nospam.com> wrote in message
news:ucSnGnHJ...@TK2MSFTNGP12.phx.gbl...

My environment is different - I connect through an ADSL router.
Try a different port, by running this command:

telnet hawthorn.hopto.org 5901

If successful then you should get this response: RFB 003.003.


Ayende Rahien

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Apr 17, 2004, 10:29:15 AM4/17/04
to
Pegasus (MVP) wrote:

> "Ayende Rahien" <Aye...@nospam.com> wrote in message

> news:ucSnGnHJ...@TK2MSFTNGP12.phx.gbl...
>

>
> My environment is different - I connect through an ADSL router.
> Try a different port, by running this command:
>
> telnet hawthorn.hopto.org 5901
>
> If successful then you should get this response: RFB 003.003.

I got the correct response.

Jetro

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Apr 17, 2004, 12:52:59 PM4/17/04
to
As a part of troubleshooting, I would disable VPN temporarily and fix DNS
settings, sof-sof.


Pegasus (MVP)

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Apr 17, 2004, 6:27:05 PM4/17/04
to

"Ayende Rahien" <Aye...@nospam.com> wrote in message
news:e$bF5hIJE...@TK2MSFTNGP12.phx.gbl...

This proves that you have a firewall component in your VPN
setup that blocks certain ports.


Mike

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Apr 17, 2004, 7:57:57 PM4/17/04
to
I tried some of your nslookups and tracert, etc.

NS lookup on your mail destinaton:
s:\>nslookup mail.ayende.com
Server: resolver1.level3.net
Address: 209.244.0.3
Non-authoritative answer:
Name: mail.ayende.com
Address: 199.203.54.224


NS lookup on your IP address reports the following:
s:\>nslookup 213.8.171.57
Server: resolver1.level3.net
Address: 209.244.0.3
Name: genie03-171-57.inter.net.il
Address: 213.8.171.57

As you can see by your posted results, your DNS settings are also problematic.
You should enable DNS recursion and forwarding on your DNS servers to properly
locate DNS names outside your LAN.


Tracert doesn't really prove anything except that pinging also isn't going to
work.
Here's my tracert to mail.ayende.com

s:\>tracert mail.ayende.com


Tracing route to mail.ayende.com [199.203.54.224]
over a maximum of 30 hops:

4 100 ms 100 ms 110 ms so-6-0-0.edge1.SanJose1.Level3.net
[209.244.3.138]
5 110 ms 110 ms 100 ms 204.255.173.41
6 101 ms 110 ms 110 ms 0.so-0-3-0.XL1.SCL2.ALTER.NET [152.63.48.14]
7 101 ms 110 ms 100 ms 0.so-4-0-0.TL1.SCL2.ALTER.NET [152.63.0.253]
8 171 ms 170 ms 180 ms 0.so-1-2-0.TL1.NYC9.ALTER.NET [152.63.10.77]
9 170 ms 180 ms 170 ms 0.so-7-0-0.XL1.NYC4.ALTER.NET [152.63.10.21]
10 180 ms 170 ms 181 ms 0.POS6-0.GW12.NYC4.ALTER.NET [152.63.22.77]
11 170 ms 181 ms 180 ms netvision2-gw.customer.alter.net [157.130.25.38]
12 320 ms 320 ms 311 ms pos9-0.core1.hfa.nv.net.il [212.143.12.21]
13 310 ms 321 ms 330 ms gi1-2.srvc01.hfa.nv.net.il [212.143.8.71]


14 * * * Request timed out.
15 * * * Request timed out.

"Ayende Rahien" <Aye...@nospam.com> wrote in message

news:eBhRO7GJ...@TK2MSFTNGP11.phx.gbl...

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