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<pre style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; white-space: pre-wrap;">From the jnos manual...
smtp trace [<value>]
Displays or sets the trace flag in the SMTP client, allowing you to watch SMTP's
conversations as it delivers mail. Zero (the default) disables tracing. A trace
value of 1 just enables the "new mail for n5knx from <a class="moz-txt-link-rfc2396E" href="mailto:k5arh@w5ddl.ampr.org"><k5arh@w5ddl.ampr.org></a>".
Larger values produce more voluminous trace output.
</pre>
73,<br>
<br>
Bob VE3TOK<br>
<br class="Apple-interchange-newline">
<div class="moz-cite-prefix">On 14-07-28 01:53 PM, Lakenet wrote:<br>
</div>
<blockquote cite="mid:065DC6DAF2C146F58762BB5F4F06DCBA@JerryPC"
type="cite">Michael,
<br>
<br>
Thank you for the note. I failed to mention that my Linux JNOS
machine is located behind a Netscreen NS5GT firewall that blocks
all but trusted incoming mail on port 25. That blocks the
thousands of spam mails that would otherwise come in daily. Is
there any trace or other parameter that I can set in JNOS to
monitor outgoing SMTP traffic so I can see how and where outgoing
SMTP traffic is going? I'm not a network person so I learn by lots
of reading and trial and error. I will look into a mail server
that I can run on the Linux machine and I have a couple of mentors
that can help.
<br>
<br>
Jerry, N0MR
<br>
<br>
-----Original Message----- From: Michael E Fox - N6MEF
<br>
Sent: Monday, July 28, 2014 12:13 PM
<br>
To: 'TAPR xNOS Mailing List'
<br>
Subject: Re: [nos-bbs] SMTP gateway
<br>
<br>
JNOS already uses SMTP so it doesn't require a gateway. But ...
<br>
<br>
-- The SMTP code in JNOS is very old and I've seen it do a couple
things
<br>
(like pipelining when that option has not been negotiated) that
aren't quite
<br>
correct by today's standards
<br>
-- The SMTP code in JNOS has no security mechanisms
<br>
<br>
So, if you are sending SMTP messages to or receiving SMTP messages
from any
<br>
other machine that you don't trust 100% (this includes anything on
the
<br>
Internet and probably the rest of 44-net) then you should
configure 'smtp
<br>
gateway' to the address of a mail server you do trust.
<br>
<br>
For example, here is one way to do it: Each of the linux machines
that runs
<br>
JNOS in our network is also running a mail server. JNOS is
configured with
<br>
'smtp gateway' set to the linux IP address. The linux mail
server
<br>
configuration performs a dozen or more security checks on incoming
mail
<br>
connections from other machines, including: DNS lookups,
blacklist lookups,
<br>
relay lookups, network-based lookups, spam detection, virus
scanning, and
<br>
more. It also performs some outbound checks to make sure JNOS has
not be
<br>
compromised. If your mail server is exposed to the Internet and
you monitor
<br>
the mail logs on such a machine, you'll find that it will be hit
with relay
<br>
or spam or virus attempts multiple times per hour. But the
gateway rejects
<br>
all of that (hopefully!), protecting the JNOS system.
<br>
<br>
Some home/SOHO routers may have something simple built into their
software
<br>
which lets them protect you from some attacks. Consult you're
router's
<br>
documentation for details. Perhaps Google or Yahoo or others
provide a free
<br>
service. Postini (now part of Google, ugh!) and others provide
paid
<br>
services. For details on how to set up your own, more
comprehensive
<br>
solution, consult the documentation for your preferred mail server
software:
<br>
sendmail, postfix, exim, ...
<br>
<br>
Finally, the JNOS release notes provide some details about extra
'smtp
<br>
gateway' options that were added a few versions ago.
<br>
<br>
Michael
<br>
N6MEF
<br>
<br>
<br>
-----Original Message-----
<br>
From: <a class="moz-txt-link-abbreviated" href="mailto:nos-bbs-bounces@tapr.org">nos-bbs-bounces@tapr.org</a> [<a class="moz-txt-link-freetext" href="mailto:nos-bbs-bounces@tapr.org">mailto:nos-bbs-bounces@tapr.org</a>]
On Behalf
<br>
Of Lakenet
<br>
Sent: Monday, July 28, 2014 9:12 AM
<br>
To: TAPR xNOS Mailing List
<br>
Subject: [nos-bbs] SMTP gateway
<br>
<br>
I have always set SMTP gateway to none not knowing how to use that
gateway.
<br>
Recently I read a reflector post that the gateway should be set to
the
<br>
address of the home router I assume to route unroutable mail out
into the
<br>
internet. I understand that any packet mail with no route to
deliver would
<br>
go to the SMTP queue. So I entered a gmail address from within
JNOS for a
<br>
test and the mail did get to the recipient. I did not see anything
on the
<br>
monitor. How does this operation run? Does ampernet have some type
of mail
<br>
handler? Does anyone know if there is something written to explain
this
<br>
operation or can someone type me a simple explanation.
<br>
<br>
Thank you,
<br>
<br>
Jerry, N0MR
<br>
<br>
<br>
_______________________________________________
<br>
nos-bbs mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:nos-bbs@tapr.org">nos-bbs@tapr.org</a>
<br>
<a class="moz-txt-link-freetext" href="http://www.tapr.org/mailman/listinfo/nos-bbs">http://www.tapr.org/mailman/listinfo/nos-bbs</a> <br>
<br>
_______________________________________________
<br>
nos-bbs mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:nos-bbs@tapr.org">nos-bbs@tapr.org</a>
<br>
<a class="moz-txt-link-freetext" href="http://www.tapr.org/mailman/listinfo/nos-bbs">http://www.tapr.org/mailman/listinfo/nos-bbs</a>
<br>
</blockquote>
<br>
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