similar to: Logging failed attempts to correct usernames

Talking to myself again ;-) Samba-tool is working a little bit different then the silo/policy management on a Windows-DC. On a Windows-DC after assigning the user and host to the silo you have to assign the silo to the user and the host. When assigning the user and host to the silo with samba-tool, the assignment to the user and the host will be done at the same time. So now my policy looks

Thanks Rob for chiming in. Stefan, I do want to be very clear, one of the big challanges that we as developers face building these kind of tools is that we don't run AD domains day-to-day. So we really value good feedback on the ergonomics. If you can test with our work in progress, we are keen to adapt the tooling where possible to be more in line with what is 'naturally expected, so

Hi Stefan, We had a long weekend in New Zealand, I'm catching up now to your emails. Some of the slight differences between Windows tools I've already picked up on and are in my PR Andrew Bartlett mentioned on Friday, but I'm always open to learning what things are missing or different etc. On 23/10/23 02:58, Stefan Kania via samba wrote: > Talking to myself again ;-) > >

On 11/27/2017 12:10 PM, Jerry Geis wrote: > hi All, > > I happened to login to one of my servers today and saw 96000 failed login > attempts. shown below is the address its coming from. I added it to my > firewall to drop. > > Failed password for root from 123.183.209.135 port 14299 ssh2 > > FYI - others might be seeing it also. > You're going to see this probably

Hello: I have been looking into projects that will automatically restrict hacking attempts on my servers running CentOS 5. I think the two top contenders are: DenyHosts - http://denyhosts.sourceforge.net Fail2ban - http://www.fail2ban.org >From what I see, DenyHosts only blocks based on failed SSH attempts whereas Fail2ban blocks failed attempts for other access as well. The main benefit

Tonight I added fail2ban to one of my webservers to test it out. Here is my step by step, as best as I could figure it out...documentation a bit sketchy. feel free to add anything to it or suggest changes. I tried to set it up to deal with ssh, http authentication, dovecot, ftp, and postfix I could find no working example for centos 6 and there is no fail2ban book available to peruse. So,

I'd like to: 1) use samba3 as a PDC, and 2) not use LDAP as the account backend database, and 3) specify samba to use but use "encrypt passwords = true", and 4) use an ldap server as the authentication source for samba. Is that possible? I'd assumed it would be given that samba is pam-aware, and I can tell pam to use ldap for authN. However, the man page for smb.conf seems to

Hello, is it possible to limit the number of pop3 (or imap) login attempts from one IP with dovecot to stop attackers? We recently had an attack from one IP-address lasting 50 minutes that tried 50000 pop3-logins with guessed users and passwords. I know about Fail2Ban but really would prefer an easy to configure solution inside of dovecot. Dovecot has this anvil daemon, can it be used

When I looked at `man pam_unix`, I did not see any obvious options that would cause ssh to authenticate without prompting for a password at all, short of setting an empty password which is similar to PermitEmptyPasswords option. However, I am not very familiar with the internals of PAM, so pointers to documentation would be greatly appreciated. Also, I think adding a single line to sshd_config

I need to save that to database because I have more then one mail server and them must share each other failed login attempts information. I'll try check how Dovecot Authentication Policy works. --JAcek 2017-06-12 16:50 GMT+02:00 Leonardo Rodrigues <leolistas at solutti.com.br>: > Em 12/06/17 09:39, j.emerlik escreveu: > >> Failed login attempts information may be useful

Am 18.07.2017 um 22:15 schrieb mj: > Hi, > > Thanks for the quick follow-ups! Much appreciated. After posting this, I > immediately started working on fail2ban. And between my initial posting > and now, fail2ban already blocked 114 IPs. > > I have fail2ban with maxretry=1 and bantime=1800 > > However, it seems almost all IPs are different, and I don't think I can

Hello, Dovecot is logging authentication failures this way: ------ Jul 12 18:07:19 vps0 dovecot: imap-login: Disconnected (auth failed, 22 attempts in 172 secs): user=<info>, method=PLAIN, rip=82.95.148.152, lip=1.2.3.4, TLS, session=<QylMqlLhVwBSX5SY> ------ Fail2ban is trying to catch them with this regex: ------ failregex = .*(?:pop3-login|imap-login):.*(?:Authentication

Hello all, I am trying to understand how SAMBA finds nearest Domain Controller when configured to use Active Directory for AuthN. There are some great articles and wikis about how to configure SAMBA against AD, but couldn't find much on what I was looking for. For example 1. Does Samba have built in dc locator functionality like windows clients ? 2. What is the default authN it uses, NTLM

Hi all, We have Exim using Dovecot for authentication. Dovecot, in turn, consults a custom internal server that answers Dovecot?s userdb queries. When IMAP connections arrive, for some users we want to forward those connections--without authentication--to an external IMAP server. For these users, we return ?proxy_maybe? and ?nopassword? in the authn response from our userdb server. This tells

Hi Guys, Running Dovecot 2 on my server. It is regularly getting dictionary auth attacked. What I have noticed is that once connected to a pop3/imap login session, you can send endless incorrect usernames+passwords attempts. This is a problem for me... I use fail2ban to try and stop these script kiddies. The problem is that fail2ban detects the bad auths, firewalls the IP, however,

Hi, Sorry for the delay in replying. Been having a few mail problems ironically! Gmail smtp server stopped working! On 23/09/2019 4:13 PM, Bernd Petrovitsch via dovecot wrote: > It's not directly a solution within dovecot but "fail2ban" exists. Yes, I have fail2ban, but that bans based on IP address. And most mail password attacks these days are distributed, and although

Hi, Thanks for the quick follow-ups! Much appreciated. After posting this, I immediately started working on fail2ban. And between my initial posting and now, fail2ban already blocked 114 IPs. I have fail2ban with maxretry=1 and bantime=1800 However, it seems almost all IPs are different, and I don't think I can keep the above settings permanently. Robert, your iptables suggestions are

And if you're really security conscious consider using port knocking (knock server - amazingly easy to set up. Or use fwknop, a little more difficult to set up but not much. Finally, for the hard core who really like pain - write the iptables rules yourself). ----- Original Message ----- From: "Pete Biggs" <pete at biggs.org.uk> To: "centos" <centos at

see pam_permit(8) On Thu, Jun 27, 2024 at 10:37?AM Henry Qin <hq6 at cs.stanford.edu> wrote: > > When I looked at `man pam_unix`, I did not see any obvious options that > would > cause ssh to authenticate without prompting for a password at all, short of > setting an empty password which is similar to PermitEmptyPasswords option. > > However, I am not very familiar

Pete Biggs wrote: > On Mon, 2017-11-27 at 12:10 -0500, Jerry Geis wrote: >> hi All, >> >> I happened to login to one of my servers today and saw 96000 failed >> login attempts. shown below is the address its coming from. I added it to my >> firewall to drop. >> >> Failed password for root from 123.183.209.135 port 14299 ssh2 >> >> FYI -