Hi,

can I provide anything further?

Nick Upson



On 17 November 2011 15:26, Nick Upson <[email protected]> wrote:

> # tcpdump -i lo port 25
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on lo, link-type EN10MB (Ethernet), capture size 96 bytes
> 15:21:33.660335 IP localhost.localdomain.43847 >
> localhost.localdomain.smtp: S 4240463938:4240463938(0) win 32792 <mss
> 16396,sackOK,timestamp 169704903 0,nop,wscale 7>
> 15:21:33.660348 IP localhost.localdomain.smtp >
> localhost.localdomain.43847: S 4242120447:4242120447(0) ack 4240463939 win
> 32768 <mss 16396,sackOK,timestamp 169704903 169704903,nop,wscale 7>
> 15:21:33.660356 IP localhost.localdomain.43847 >
> localhost.localdomain.smtp: . ack 1 win 257 <nop,nop,timestamp 169704903
> 169704903>
> 15:21:33.660420 IP localhost.localdomain.43847 >
> localhost.localdomain.smtp: F 1:1(0) ack 1 win 257 <nop,nop,timestamp
> 169704903 169704903>
> 15:21:33.661210 IP localhost.localdomain.smtp >
> localhost.localdomain.43847: . ack 2 win 256 <nop,nop,timestamp 169704904
> 169704903>
> 15:21:33.671733 IP localhost.localdomain.smtp >
> localhost.localdomain.43847: P 1:37(36) ack 2 win 256 <nop,nop,timestamp
> 169704914 169704903>
> 15:21:33.671746 IP localhost.localdomain.43847 >
> localhost.localdomain.smtp: R 4240463940:4240463940(0) win 0
>
> the output from "tcpdump -w ~/smtp.dump -s 0 -i lo port 25 " I am sending
> direct as I expect attachments not allowed
>
> Nick Upson
>
>
>
>
> On 17 November 2011 15:15, Martin Pala <[email protected]> wrote:
>
>> You can set the tcpdump/wireshark/etc. to use the loopback interface …
>> for example using tcpdump:
>>
>>    tcpdump -w ~/smtp.dump -s 0 -i lo port 25
>>
>> Martin
>>
>>
>>
>> On Nov 17, 2011, at 4:09 PM, Nick Upson wrote:
>>
>> Hi,
>>
>> its monit 5.3.1, I don't see how I can provide network trace when monit
>> and the postfix instance are on the same machine - localhost
>>
>> Nick Upson
>>
>>
>>
>> On 17 November 2011 15:05, Martin Pala <[email protected]> wrote:
>>
>>> Hi,
>>>
>>> which monit version it is? Please can you provide network trace for the
>>> test?
>>>
>>> Thanks,
>>> Martin
>>>
>>>
>>> On Nov 16, 2011, at 12:27 PM, Nick Upson wrote:
>>>
>>> > Hi,
>>> >
>>> > my check on postfix and the output in /var/log/maillog are below. I
>>> don't expect some of the behaviour
>>> >
>>> > a) monit appears to connect to postfix twice for each cycle
>>> >
>>> > b) the sequence is connect, lost connection, disconnect, surely monit
>>> connects and then disconnects so the lost connections are an error postfix
>>> or monit
>>> >
>>> >
>>> >
>>> > check process postfix with pidfile "/var/spool/postfix/pid/master.pid"
>>> > start program = "/etc/init.d/postfix start"
>>> > stop  program = "/etc/init.d/postfix stop"
>>> > if failed host localhost port 25 type tcp then restart
>>> >
>>> >
>>> > Nov 16 11:16:29 t227 postfix/smtpd[14595]: connect from
>>> localhost.localdomain[127.0.0.1]
>>> > Nov 16 11:16:29 t227 postfix/smtpd[14595]: lost connection after
>>> CONNECT from localhost.localdomain[127.0.0.1]
>>> > Nov 16 11:16:29 t227 postfix/smtpd[14595]: disconnect from
>>> localhost.localdomain[127.0.0.1]
>>> > Nov 16 11:18:29 t227 postfix/smtpd[14704]: connect from
>>> localhost.localdomain[127.0.0.1]
>>> > Nov 16 11:18:29 t227 postfix/smtpd[14704]: lost connection after
>>> CONNECT from localhost.localdomain[127.0.0.1]
>>> > Nov 16 11:18:29 t227 postfix/smtpd[14704]: disconnect from
>>> localhost.localdomain[127.0.0.1]
>>> >
>>> > Nick Upson
>>> >
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