Re: [OT] Sendmail: Open relay was tested as closed but...

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On 04/21/2014 10:11 AM, Dan Thurman wrote:
On 04/21/2014 07:10 AM, Alexander Dalloz wrote:
Am 21.04.2014 09:12, schrieb Dan Thurman:
On 04/20/2014 02:00 PM, Dan Thurman wrote:

I have F8 and F18. F8 is not affected by HB and F18 is HB
fixed (recompiled) and certificates regenerated. Both Fedora
versions have the same "open-relay" issues and both have
similar or nearly identical sendmail.mc configurations.

You are seriously running 2 obsolete Fedora releases as MTAs exposed to the public net? Setup security patched platforms for public hosts.
ok.

Here is my sendmail.mc file and
let me know if there is a problem?:

<snip!>

DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl
Drop 1 below:
DAEMON_OPTIONS(`Family=inet, Port=465, Name=MTA-SSL M=s')dnl
Add 2 below:
DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl

So far, the spamming stopped...

You changes are random an do not explain why spammers were/are able to misuse your Sendmail.
This is what I am trying to understand. I was adding spammers to the access
database, only to discover that the access database was either ignored or
the access database record added was bogus to begin with.

DAEMON_OPTIONS(`Family=inet, Port=465, Name=MTA-SSL M=s')dnl

and

DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl

are equal. There is no functional difference. And offering the additional daemon on the submission port and enforcing authentication for that service just adds a function and does not fix anything previously configured.

In fact using submission on port 587 with STARTTLS is the right thing
How can I do this?

instead of the obsoleted SMTPS on port 465.

Alexander

Ok, so what DAEMONs do I need? So far you said:

? DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl

Obsolete: DAEMON_OPTIONS(`Family=inet, Port=465, Name=MTA-SSL M=s')dnl
                above identical with below
Obsolete: DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
No value: DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl

Thanks!

I found an old posting you made here:
http://compgroups.net/comp.mail.sendmail/problem-using-port-587/1312021

Knute Johnson wrote:
[...]
:: I want to be able to have the outside world connect to my sendmail on
:: port 25 and port 587.  Is that possible?  What do I need to change?

Alexander Dalloz replied:
: Do you have more than the 1 IP (208.1.40.42)? If not it is sufficient to
: configure in sendmail.mc:
:
: DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl
: DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
[...]

So, I tried only the two DAEMONs and 'telnet localhost 587' worked!
So far,  I see no spamming as of yet...

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