Re: Mail account brute force / harassment

[Aki Tuomi via dovecot]

On 12 April 2019 at 22:01 Robert Kudyba via dovecot < dovecot@dovecot.org> wrote:

>

On 12 April 2019 21:45 Robert Kudyba via dovecot < dovecot@dovecot.org>

wrote:

>

>

You are running some kind of proxy in front of it.

No proxy. Just sendmail with users using emacs/Rmail or

Webmail/Squirrelmail.

>

If you want it to show real client IP, you need to enable forwarding

of said data. With dovecot it's done by setting

login_trusted_networks = your-upstream-host-or-net

in backend config file.

OK I changed it and restarted wforce and dovecot. Still seeing this:

Apr 12 14:38:55 auth: Debug:

policy(ouruser,127.0.0.1,<6GFTnVmGcMN/AAAB>): Policy server request JSON:

{"device_id":"","login":"

ouruser","protocol":"imap","pwhash":"43","remote":"127.0.0.1","success":false,"policy_reject":false,"tls":false}

>

For webmails, this requires both login_trusted_networks and also

support from the webmail software to forward client IP.

>

I did get a reply from the Squirrelmail list:

"Well, I've had code sitting around for a while that implements RFC2971

(ID command), so I just committed it. You can use it for this purpose by

putting something like this into your config/config_local.php

$imap_id_command_args = array('remote-host' => '###REMOTE ADDRESS###');"

Which I also added previously. But that doesn't address emacs/RMail

users.

>

Could there be a setting in sendmail.mc/cf (

https://urldefense.proofpoint.com/v2/url?u=http-3A__sendmail.mc_cf&d=DwICaQ&c=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM&r=X0jL9y0sL4r4iU_qVtR3lLNo4tOL1ry_m7-psV3GejY&m=CsaMqvBelGXz-_ClT0RDzwqz0tH3cTGNItJktQeULLs&s=JnUd5ej3Twniz2q3fiWUrV_qOFlAwvFHquFjfgsoQJ0&e=)

file that I'm missing?

Can you verify following?

doveconf auth_policy_request_attributes

auth_policy_request_attributes = login=%{requested_username}

pwhash=%{hashed_password} remote=%{rip} device_id=%{client_id} protocol=%s

On some versions remote is mistakenly %{real_rip} which expands into where

the connection came from instead of client IP.

If it's wrong just feel free to copypaste the setting above into dovecot

config.

Verified. I believe you told me that on the other thread and I made that

change a while back.

Fot the webmail array you probably need https://wiki2.dovecot.org/Design/ParameterForwarding so you can configure it correctly.

No idea how to configure sendmail.

---
Aki Tuomi