- Original Message -
> From: "Christian Kivalo"
> To: postfix-users@postfix.org
> Sent: Saturday, January 23, 2016 2:56:25 PM
> Subject: Re: Postfix Postscreen Pregreet Test
> Am 23. Jänner 2016 04:30:02 MEZ, schrieb Nguyen Nang Thang
> :
>>- Origin
On 23/01/16 16:30, Nguyen Nang Thang wrote:
> Wietse:
> I dit my test as below:
> # nc localhost 25 < /tmp/postscreen-greet-wait.txt
> The output:
> 220 gw.mydomain.com ESMTP Postfix (2.10.1)
> 250 2.1.0 Ok
> 250 2.1.5 Ok
> 354 End data with .
> 250 2.0.0 Ok: queued as 35CA025E69
>
> The postfix/p
Am 23. Jänner 2016 04:30:02 MEZ, schrieb Nguyen Nang Thang
:
>- Original Message -
>> From: "Wietse Venema"
>> To: "Postfix users"
>> Sent: Saturday, January 23, 2016 9:57:40 AM
>> Subject: Re: Postfix Postscreen Pregreet T
- Original Message -
> From: "Wietse Venema"
> To: "Postfix users"
> Sent: Saturday, January 23, 2016 9:57:40 AM
> Subject: Re: Postfix Postscreen Pregreet Test
> Nguyen Nang Thang:
>> > Postfix sends:
>> >
>> >220-my
Nguyen Nang Thang:
> > Postfix sends:
> >
> > 220-myhostname ESMTP
> >
> > Postfix waits $postscreen_greet_wait seconds.
> > Bad SMTP clients will greet before $postscreen_greet_wait seconds
> > have passed.
> >
> > 220 myhostname ESMTP
> >
> > Good SMTP clients will greet now.
>
> Wie
- Original Message -
> From: "Wietse Venema"
> To: "Nguyen Nang Thang"
> Cc: "Postfix users"
> Sent: Saturday, January 23, 2016 9:09:09 AM
> Subject: Re: Postfix Postscreen Pregreet Test
> Nguyen Nang Thang:
>> >> > dom
Nguyen Nang Thang:
> >> > domain zen.spamhaus.org as 127.0.0.4
> >> > Jan 22 00:00:53 spike postfix/postscreen[44350]: PREGREET 16 after 0.69
> >> > from
> >> > [177.231.207.212]:38026: HELO bryozoann\r\n
> >
> > That is a zombie that speaks before its turn.
>
> Ok, I'm clear about the operation
- Original Message -
> From: "Wietse Venema"
> To: "Postfix users"
> Sent: Saturday, January 23, 2016 8:21:47 AM
> Subject: Re: Postfix Postscreen Pregreet Test
> Nguyen Nang Thang:
>> > domain zen.spamhaus.org as 127.0.0.4
>> > Jan
Nguyen Nang Thang:
> > domain zen.spamhaus.org as 127.0.0.4
> > Jan 22 00:00:53 spike postfix/postscreen[44350]: PREGREET 16 after 0.69 from
> > [177.231.207.212]:38026: HELO bryozoann\r\n
That is a zombie that speaks before its turn.
Quoting from POSTSCREEN_README"
When an SMTP client sends a
- Original Message -
> From: "Wietse Venema"
> To: "Postfix users"
> Cc: postfix-users@postfix.org, u...@porcupine.org
> Sent: Saturday, January 23, 2016 7:29:00 AM
> Subject: Re: Postfix Postscreen Pregreet Test
> Nguyen Nang Thang:
>&
Nguyen Nang Thang:
> I donot know how to demonstrate the test "postscreen_greet_wait" to know that
> Postscreen is protecting zombies/spambots that speak before its turn.
> Any tools or ways for this test?
Turn it on, and let the zombies be your testers.
Jan 22 00:00:53 spike postfix/postscreen[4
Hi all,
I've used Postfix/Postcreen to protect zombies/spambots to our email system.
Currently, I've setup the pregreet test of Postscreen as configuration below:
In main.cf:
postscreen_access_list = permit_mynetworks,
cidr:/etc/postfix/postscreen_access.cidr
postscreen_blacklist_action = enfo
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