frequents disconnetions pop/smtp

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inle
Posts: 12
Joined: Sat Sep 13, 2014 3:15 am

frequents disconnetions pop/smtp

Postby inle » Fri Jun 23, 2017 10:27 am

Hello,

We have a multi-servers configuration:

2-servers acting as mta/proxy
2-servers acting as mailstore/ldap

We are having problem with multiple user behind one IP (for instance society with one public IP). they get frequents disconnetions pop/smtp.

I thing there must be a kind of pretection mechanins that is launch when the mumbers of connection comming from one IP is important and new connexions are rejected.
Any idea please?

SIncerily

Inle


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Raun
Zimbra Employee
Zimbra Employee
Posts: 48
Joined: Thu Mar 24, 2016 1:22 pm

Re: frequents disconnetions pop/smtp

Postby Raun » Sat Jun 24, 2017 5:31 am

check the dos filters.
inle
Posts: 12
Joined: Sat Sep 13, 2014 3:15 am

Re: frequents disconnetions pop/smtp

Postby inle » Mon Jun 26, 2017 2:19 pm

Hello,

Dosfilter are configure in store servers as follow:

zmprov gcf zimbraHttpDosFilterDelayMillis
zimbraHttpDosFilterDelayMillis: 20

zmprov gcf zimbraHttpDosFilterMaxRequestsPerSec
zimbraHttpDosFilterMaxRequestsPerSec: 100


Thanks

SIncerilly
inle
Posts: 12
Joined: Sat Sep 13, 2014 3:15 am

Re: frequents disconnetions pop/smtp

Postby inle » Tue Jun 27, 2017 3:56 pm

Hello,
ANy body has an idea about this ?

my client compleint about frequents disconnetions pop/smtp

Thanks

Sincerily
inle
Posts: 12
Joined: Sat Sep 13, 2014 3:15 am

Re: frequents disconnetions pop/smtp

Postby inle » Wed Jun 28, 2017 1:38 pm

Hello,

by now we have changed zimbraHttpDosFilterMaxRequestsPerSec to 200 we fixed some issues with zimbraHttpThrottleSafeIPs

but we found this on mailbox.log:


2017-06-28 15:26:18,864 ERROR [ImapSSLServer-5] [name=user@domain;mid=437;ip=xx.xx.xx.xx;oip=xx.xx.xx.xx;via=Mac OS X Mail/10.2 (3259),xx.xx.xx.xx(nginx/1.7.1);ua=Zimbra/8.7.0_GA_1659;] imap - zimbraImapMaxConsecutiveError exceeded 5

We noticed that it is related frequently to Mac OS Mail appliance.

And in zimbra there is this parameter imap_max_consecutive_error = 5

Should we increase this parameters or is there something to do about Mac mail appliance?



Sincerily
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DualBoot
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ZCS/ZD Version: ZCS FLOSS - 8.7.11 Mutli servers

Re: frequents disconnetions pop/smtp

Postby DualBoot » Mon Jul 10, 2017 8:42 pm

Hello,

set this parameter to 0
zimbraInvalidLoginFilterMaxFailedLogin

Enjoy
inle
Posts: 12
Joined: Sat Sep 13, 2014 3:15 am

Re: frequents disconnetions pop/smtp

Postby inle » Thu Dec 07, 2017 3:11 pm

Hello I thank you for the answer.
i have stop comming to the forum
I came to the forum yesterday and I saw your answer

Thank you , We will try your solution

sincerilly



DualBoot wrote:Hello,

set this parameter to 0
zimbraInvalidLoginFilterMaxFailedLogin

Enjoy

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