I am running a ubuntu server 10.10 with SSH, and OpenVPN. I use it mainly for the VPN, but I have seen log in attempts such as:
Mar 22 14:52:53 UbuntuSvr sshd: Invalid user support from 220.127.116.11
Mar 22 14:52:55 UbuntuSvr sshd: Invalid user student from 18.104.22.168
Mar 22 14:52:57 UbuntuSvr sshd: Invalid user transfer from 22.214.171.124
Mar 22 14:52:59 UbuntuSvr sshd: Invalid user user from 126.96.36.199
Is it possible to make it so when some one has tried logging in 5 times with an invalid user/pass that the ip is banned for 10 minutes? I have password auth set to no and am using keys.
I have an SSH server on my laptop, and I'm using the default configuration file, but I added "AllowUsers <myUserName>". I get lots of login attempts like the ones below in my /var/log/auth.log.From Google, I find that pam_winbind allows some kind of Windows authentication. This leaves me with 2 questions. What does winbind do when I have not configured any Windows/Samba accounts? How can I turn it off?
Code: Oct 23 20:01:49 muon sshd: User root from 188.8.131.52 not allowed because not listed in AllowUsers
I know this is probably easy and if I only took a while to figure it out maybe I could but I have some stuff that needs to happen soon and I can't figure this out. I was wondering how I could have a log monitor that would email me whenever someone tries to login over ssh to my system. I'm open to everything daemons/scripts or cron itl works as I am not running a production server (but I might be starting that soon). Oh and just a side how do I get sent an email when I get port scanned
I am trying to get OpenLDAP to authenticate user logins, but running around in circles. Are there any logs produced by either client and/or server that would indicate possible reasons why it was unable to login as a user?Below is an explanation, any ideas would be appreciated, as I think everything is setup as per the various articles on using LDAP.
I have a CentOS 5.5 OpenLDAP server, and several others, some host services, some are file shares (samba).So far I have been able to successfully configure OpenLDAP to carry out all the ldap* commands from both the local server and from any of the remote servers, either via non-ssl or ssl connections. However, as soon as I try connecting any services up to it, it doesn't play ball.Back to basics, having cleared off all previous attempts at this from all machines, I have gone through the following:
Installed OpenLDAP server/client on host (plus nss_ldap). Configured /etc/openldap/slapd.conf (see below) Configured /etc/openldap/ldap.conf (see below)
I am having a web server (apache) and 3 sites are hosted in it, named as www.web1.com,www.web2.com and www.web3.com. I need to restrict www.web2.com to Internet users and allow only to local network. At same time I need to allow www.web1.com and www.web3.com to both Internet and LAN users.
I have suspicious requests in my haproxy logs from multiple sources to the same target. I could deny them in /etc/hosts.deny, but there are too many to keep track of. Is there a way to deny all requests to a specific target either in haproxy or through iptables?
Here's an example of the request: Apr 12 15:11:37 127.0.0.1 haproxy: 184.108.40.206:27072 [12/Apr/2011:15:11:37.315] web_servers frontend_farm/######## 3/0/1/1/169 404 1073 - - --NI 3/3/2/1/0 0/0 "GET /images/comment_icon.gif HTTP/1.1"
I've commented out my amazon instance id for security purposes. The request is for comment_icon.gif which does not exist. All requests go to that. The source IPs are from different countries as well. Blocking a certain country won't work either. Basically, if there was a way to send all requests for comment_icon.gif to /dev/null or something it would work.
It's been awhile since I've been on here. I suppose that can be considered a good thing, since I made the completely transfer to Ubuntu three months ago and everything's been running completely smoothly. Anyway, security is a pretty big thing to me. I usually change the root password, take sudo off (and default gksu, not gksudo), encrypt my hard drives, etc... One thing I also do is create a separate password for my login keyring. I don't mind having to enter one extra password at login, but it started prompting two times, and now three. It's the same password every time, so my question is..
How do I limit the max login attempts in the sshd_config file? I found a way to do it on Google some time back but I can't find it now. I have Denyhost already, but I really wanna do the "MAx Login Attempts" what ever it was that I was able to do in the config file.
I'm running the firestarter firewall and its been showing the odd ssh attempt quite often. e.g. I've had 4 attempts today, 3 in the last 40mins. I realize that this may be nothing to serious but it's got me curious, aside from having a secure password (which I have) is there anything that else that I can do to ensure that my system is as secure as possible from ssh? I do use ssh within my home network so I don't want to disable it completely.
Somehow an app on this box seems to have disappeared long ago which was configured to start immediatedly with a root login (eg su). Now, whenever upgrading permissions to root or logging (and assuming login as root), an error displays saying "cannot find <application>"
Considering root usually is different than other logins, am not sure where to start looking on an OpenSuSE box. I've tried without success
BASH -v to enable verbose mode before executing a "su." BASH --debugger to enable debugging mode before executing a "su."
Logout, Login as root and inspect /var/log/ hoping to find some logfile that audits the login sequence, but may be looking at a wrong logfile.
My server (CentOS 5.4) is being bombarded 24x7 with IP addresses from China trying to exploit phpMyAdmin. For every one I block on the firewall, half a dozen come to the funeral! It's a pity these morons don't have something better to occupy their time. I'm getting page after page of this (see below) every day and it's been going on for weeks. I don't even have phpMyAdmin on the server. I don't use it and I deleted it.
I've read that you can use .htaccess and / or mod_rewrite to redirect / block them based on any query for phpMyAdmin (they try all letters in upper and lower case, leading to page after page). Unfortunately, I have no idea of how to do this. I already have an .htaccess file. Maybe someone can suggest what to add to stop these pests from wasting my bandwidth and suggest somewhere I could redirect them to to cause them maximum problems. I don't want to block the entire country, seems a bit like overkill, not all Chinese are morons. we aren't even in the USA, so why they are doing this is beyond me.
A TINY sample! [Sun Aug 08 13:29:08 2010] [error] [client 220.127.116.11] File does not exist: /var/www/corp/phpMyAdmin-2.7.2
currently I'm fiddling around with mod_security for apache2 configurations on CentOS boxes, right now in a test environment first (i.e. separate non production box).CentOS includes the mod_security "Core Rule Set" by Breach Security Inc, the devs behind that module.So far all's running mostly, logs/auditlogs etc.For simple testing, I made a small php form as following:
Code: <?php $link = mysql_connect("localhost",$user,$pass); //un/pw obfuscated for forum post
On my server I some times login from my home where I have an internet connection which does not have a static IP each time I switch on my modem a dynamic IP isgenerated.I see in auth.log logs of following lines Quote:reverse mapping checking getaddrinfo forkkts-kk-dynamic-01.1.168.192.some_broadband.in [192.168.1.2] failed - POSSIBLE BREAK-IN ATTEMPT Accepted publickey for root from 192.168.1.2 port 22852 ssh2when ever I login to my server from home.In this case I do know that it was me who logged in but still why do I see such a log.What is this complaining about?
Yesterday I applied the su security patch to my openSuSE 11.2 x86_64 system.After applying the patch, any attempt at su failed, and after rebooting the system earlier this morning any login (root, user, otherwise) fails with a "Permission Denied".Is it possible that the su update somehow messed up my (standard) pam settings?
For about a week now I've been seeing mass attempts to relay through postfix and login to dovecot from the same 2 addresses, none are successful due to how postfix/dovecot are configured and I wouldn't be overly worried but my isp have picked up on it and are nagging at me
What ways do people go about just dropping connection attempts from offending addresses/ranges when stuff like that happens? An ideal thing would be something that detects repeated failed attempts from a host or range and subsequently ignore/ban them, perhaps for a specified length of time, something along the lines of denyhosts and fail2ban for ssh would be great Don't know if there's anything out there or just a plain tried and trusted method anyone might use for stuff like this, if not a hint on the most appropriate way to go about it 'manually' would do
I'm using Ubuntu Maverick which seems to run ok. The problem is when booting my PC. Often it takes anywhere between two and six attempts to boot before a successful boot. Sometimes it fails with "No signal" before it reaches the grub screen, sometimes is passes grub only to fail 15 secs later with a "No signal".I have an NVidia Ge Force 6600 LE graphics card, with the latest driver 260.19.06.