thr3ads.net - dovecot - dovecot POP3 log shows too many identical RETR entries [Mar 2017]

If this information is useful, please help other people find it:
Share via:

Bappasaheb Nirmal

2017-Mar-21 16:50 UTC

dovecot POP3 log shows too many identical RETR entries

Hello,

Dovecot log is showing too many POP3 RETR entries which are identical 
lines. I also suspect that it is causing high pop traffic eating most of 
the network bandwidth. Here are some of the lines out of 11009 in a 
day.  Such pattern is observed only for few users. dovecot version is 
2.1.17.

=============Mar 20 00:00:07 pi3 dovecot: pop3(user at example.com):
Disconnected:
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:07 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=26645, secured, 
session=<5CGrmRlLyAAr861h>
Mar 20 00:00:10 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:11 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=29932, secured, 
session=<k6/gmRlL3gAr861h>
Mar 20 00:00:12 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:13 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=26819, secured, 
session=<3DX6mRlLUQAr861h>
Mar 20 00:00:14 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:15 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=9636, secured, 
session=<x5ghmhlLjwAr861h>
Mar 20 00:00:16 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:17 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=4585, secured, 
session=<8Yw+mhlL0AAr861h>
Mar 20 00:00:18 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:18 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=30049, secured, 
session=<UsJOmhlLmAAr861h>
Mar 20 00:00:19 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:20 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=9636, secured, 
session=<B6VimhlLNgAr861h>
Mar 20 00:00:20 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:20 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=4584, secured, 
session=<pVpxmhlLPwAr861h>
Mar 20 00:00:21 pi3 dovecot: pop3(user at example.com): Disconnected: 
Logged out top=0/0, retr=1/64014, del=0/1429, size=478762716
Mar 20 00:00:23 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=4585, secured, 
session=<MlGam
=============
What could be the possible reason?

Thanks,
Bappasaheb

Steffen Kaiser

2017-Mar-22 07:33 UTC

head link

dovecot POP3 log shows too many identical RETR entries

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Tue, 21 Mar 2017, Bappasaheb Nirmal wrote:
> Dovecot log is showing too many POP3 RETR entries which are identical
lines.
> I also suspect that it is causing high pop traffic eating most of the
network
> bandwidth. Here are some of the lines out of 11009 in a day.  Such pattern
is
> observed only for few users. dovecot version is 2.1.17.
>
> =============> Mar 20 00:00:07 pi3 dovecot: pop3(user at example.com):
Disconnected: Logged out
> top=0/0, retr=1/64014, del=0/1429, size=478762716
> Mar 20 00:00:07 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
> method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=26645, secured, 
> session=<5CGrmRlLyAAr861h>
> Mar 20 00:00:10 pi3 dovecot: pop3(user at example.com): Disconnected:
Logged out
> top=0/0, retr=1/64014, del=0/1429, size=478762716
> Mar 20 00:00:11 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
> method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=29932, secured, 
> session=<k6/gmRlL3gAr861h>
> =============>
> What could be the possible reason?
stating the obvious: it looks like normal POP3 polling with abnormal short 
interval.

To verify the guess sniff the network traffic, if the clients open a 
connection in that short time. If so, check out the users devices, why the 
client is polling so often.

- -- 
Steffen Kaiser
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEVAwUBWNIosnz1H7kL/d9rAQIPkwf/QtvBFJTlC/ldSriN7yFfvhqwwHSkr1xo
4QyO05oyTAewnR0b6fvWTM9/RJxye8pDqijxDDAbH+NhsUOanmHEW+5VAERt1Qaw
yij7jnJ4UQTpmTAgi1Esw87da5eHtiVrYI+v4Z+Xceh1NNzk+MZL7nqBYtztE3C/
9D1BprkKgEVCJPi5MnNBN4n2pQSlGO9WmOpdsELYOnJ5ekp0VpkSO4xk90t347uy
pDR77Ao61UBXPYtMnBOO5NDjjcduLSd0tTpWyGIlkLomcK0FSgZpblC/GQ7awnO8
MFtcBBMb3nstIjAJyx6h7jS0zLG3Uadsnc/DbGJnu0PRsgTMgwMSkg==vUqj
-----END PGP SIGNATURE-----

Steffen Kaiser

2017-Mar-22 07:37 UTC

head link

dovecot POP3 log shows too many identical RETR entries

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Wed, 22 Mar 2017, Steffen Kaiser wrote:> On Tue, 21 Mar 2017, Bappasaheb Nirmal wrote:
>
>> Dovecot log is showing too many POP3 RETR entries which are identical 
>> lines.
>> I also suspect that it is causing high pop traffic eating most of the 
>> network
>> bandwidth. Here are some of the lines out of 11009 in a day.  Such
pattern
>> is
>> observed only for few users. dovecot version is 2.1.17.
>> 
>> =============>> Mar 20 00:00:07 pi3 dovecot: pop3(user at
example.com): Disconnected: Logged
>> out
>> top=0/0, retr=1/64014, del=0/1429, size=478762716
>> Mar 20 00:00:07 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
>> method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=26645, secured,
>> session=<5CGrmRlLyAAr861h>
>> Mar 20 00:00:10 pi3 dovecot: pop3(user at example.com): Disconnected:
Logged
>> out
>> top=0/0, retr=1/64014, del=0/1429, size=478762716
>> Mar 20 00:00:11 pi3 dovecot: pop3-login: Login: user=<user at
example.com>,
>> method=PLAIN, rip=43.243.173.97, lip=192.168.1.18, mpid=29932, secured,
>> session=<k6/gmRlL3gAr861h>
>> =============>> 
>> What could be the possible reason?
>
> stating the obvious: it looks like normal POP3 polling with abnormal short
> interval.
>
> To verify the guess sniff the network traffic, if the clients open a
> connection in that short time. If so, check out the users devices, why the
> client is polling so often.
Oh, forgot to mention:

looks like that the client downloads the same message of 456MB each time 
again?

- -- 
Steffen Kaiser
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEVAwUBWNIpynz1H7kL/d9rAQKn/ggAkq4s1+BBSacoMGKtTSDuA9Hv5mcdBgLD
XYmdh3vVT9SEBLMI6OqGuaJp7OOEfEjPHqBKgwaxieRh4zIyoRlU1K+4nCqmI2tZ
8BADHyEd9DVJ0JY3PWdV9rAXvrCjX4SUbQwrpG+rCLe2WmuzrPPq5n4+o6AofEBh
LEUIqPdB9q964lymvYr8LW1GHqhcK2y3G1pGVgVpL4hZIQNfTlid0eO2D9CyA2nY
nI3fa4QvjHfDH09OSQsgfQedJqNL/G6QqNaO1jFm/nypZWb31RMOy35Njhee3OiM
nxnxzSqbyaBWSsV1dmRKq8wAnfgXsrUuue6jFepfslBFLoHy7V7i3w==VPF9
-----END PGP SIGNATURE-----

Possibly Parallel Threads

Search for more seemingly similar threads

dovecot - Mar 2017 - dovecot POP3 log shows too many identical RETR entries

dovecot POP3 log shows too many identical RETR entries

dovecot POP3 log shows too many identical RETR entries

dovecot POP3 log shows too many identical RETR entries

Possibly Parallel Threads