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Weird email problem over wireless - Jeff, got yer ears on?

Last response: in Wireless Networking
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January 4, 2005 11:44:00 PM

Archived from groups: alt.internet.wireless (More info?)

This started a couple of days ago and it's happening from several
computers at several locations. Can't download email over wireless
connections, get a server time out error (error message pasted in
below). The mail server, SendMail on RedHat 8, is at my office. If I
check mail from any of several comps at the office over the LAN, no
problems. The wireless connections go through a few links, two ends of a
backhaul, then the AP, then the CPE - all smartBridges equipment.

Other than email, all other activities zoom along at a satisfying pace.
I don't know of any reason an AP would knock out POP3 stuff, has me
puzzled right now. Not even sure it's related to the wireless side of
things but it seems more than coincidental.

Suggestions?

Error message from Outlook Express -
Your server has unexpectedly terminated the connection. Possible causes
for this include server problems, network problems, or a long period of
inactivity. Account: 'mail.mydomain.com', Server: 'mail.mydomain.com',
Protocol: POP3, Port: 110, Secure(SSL): No, Socket Error: 10053, Error
Number: 0x800CCC0F
Anonymous
a b F Wireless
January 5, 2005 1:17:01 AM

Archived from groups: alt.internet.wireless (More info?)

On Wed, 05 Jan 2005 00:23:54 -0500, Rôgêr <abuse@your.isp.com> wrote:

>> Well, what was changed last? You do keep server logs?

>I've changed socks and undies, nothing about the network or server
>changed that I'm aware of.

Well, something has changed. I suggest you interrogate all the usual
suspects.

>No routers between the server and my computer. But there is the backhaul
>to the tower and then the main access point. The backhaul is two APs
>configured for that purpose. Has worked just fine for nearly two years.

Two access points playing bridge? Can't work. What manner of
hardware? What's a "smartbridge"? (My father warned me to stay away
from products with superlatives such as super, amazing, magic,
miracle, etc. I've added smart, intelligent, advanced, and pro to the
list.) Oh...
http://www.smartbridges.com/products/backhaul.asp
Very nice.

>It's a RedHat 8 server running SendMail. My Linux guy (not me) says the
>server is working fine.

Assumption? How about doing the POP3 test I previous posted. It's
easy, painless, and very useful.

>Research says he's right. I associated my home
>CPE with another access point that is not wireless backhauled and email
>worked just fine. Switched back to the backhauled AP and email falls
>down. Everything else buzzes right along.

OK. It's the backhaul radios. Did some dingbat set the remote
management port number to port 110? Instant block if that's what
happened. Maybe someone setup a MAC address filter and left out the
mail server. See if ping, traceroute, telnet, ftp or some other
non-POP3 program works to the mail server.

>Good luck on the truck, and seriously, thanks for the pointers. I guess
>it's going to be a matter of swapping out equipment (for me, not you)
>one piece at a time. That is, unless the guys on the smartBridges list
>have a suggestion.

Bah. Power cycle the backhaul radios and everything plugged into them
first. However, I agree that it's "something" in the backhaul.
However, I don't have a clue exactly what's busted.



--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558
Anonymous
a b F Wireless
January 5, 2005 9:15:58 PM

Archived from groups: alt.internet.wireless (More info?)

Jeff Liebermann <jeffl@comix.santa-cruz.ca.us> wrote:
> Meanwhile, you're on your own. My truck has an engine problem and it
> appears that I'm gonna be busy either doing a repair or finding a
> replacement.

I think you need a new truck, judging from the number of repairs you've
made to it since last August.

--
---
Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8-122.5
Anonymous
a b F Wireless
January 5, 2005 11:56:20 PM

Archived from groups: alt.internet.wireless (More info?)

On Wed, 5 Jan 2005 18:15:58 +0000 (UTC), dold@XReXXWeird.usenet.us.com
wrote:

>Jeff Liebermann <jeffl@comix.santa-cruz.ca.us> wrote:
>> Meanwhile, you're on your own. My truck has an engine problem and it
>> appears that I'm gonna be busy either doing a repair or finding a
>> replacement.

>I think you need a new truck, judging from the number of repairs you've
>made to it since last August.

Not exactly wireloose. Actually, it's the same problem that's been
driving me nuts for the last 9 months. Today, I finally found the
problem. The coil windings in the two glow plug relay ($70/ea) became
corroded from water incursion and shorted. The solenoids would work,
but draw way too much current. The result was plenty of weird and
non-obvious symptoms. Eventually the stupid solenoid stuck closed,
blew a small relay in the controller box ($8), and fried all 4 glow
plugs ($25/ea), which presented an obvious clue. Parts are on order
and the demise of my truck is temporarily postponed.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558
Anonymous
a b F Wireless
January 6, 2005 9:47:05 AM

Archived from groups: alt.internet.wireless (More info?)

Jeff Liebermann <jeffl@comix.santa-cruz.ca.us> wrote:
> On Wed, 5 Jan 2005 18:15:58 +0000 (UTC), dold@XReXXWeird.usenet.us.com
> wrote:

>>I think you need a new truck, judging from the number of repairs you've
>>made to it since last August.

> Not exactly wireloose. Actually, it's the same problem that's been
> driving me nuts for the last 9 months. Today, I finally found the
> problem. The coil windings in the two glow plug relay ($70/ea) became
> corroded from water incursion and shorted. The solenoids would work,

Nah. Once they go over the edge, the little problems all merge and look
like one. In August it was the power steering, then it was something that
required duct tape (which I presume was not the power steering. I don't
think duct tape would hold very long in the face of power steering fluid).

I try to avoid buying more than one set of tires for most of my vehicles.
I slipped up a bit on one of them. It's had lots of tires, and all of the
accouterments replaced at least once (power steering, water pump, fan
clutch, clutch, alternator, U-joints, A/C compressor, smog pump).
It has been reduced to garbage hauling and resting quietly in the driveway.


--
---
Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8-122.5
Anonymous
a b F Wireless
January 6, 2005 6:58:45 PM

Archived from groups: alt.internet.wireless (More info?)

Jeff Liebermann <jeffl@comix.santa-cruz.ca.us> wrote:
> One big advantage to fixing trucks to fixing electronics. With the
> truck we can *SEE* what's leaking, cracked, or smoking. With
> electronics, we're no better than blind (without test equipment).

I keep the old truck around just as a reminder of what "shade tree
mechanics" could do. My newer cars are unrepairable black boxes outside
the dealer.

--
---
Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8-122.5
!