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  • Script for checking the nologin accounts and then disable the account

    - by suma
    "Could you please share the scripts which does the below ?" I have written a script that scans all the relevent logs daily, makes a list of people that have had any activity that day, and maintains database (just a text file) of users and the last time they logged in. Then I have a second script that examines the database for dates more than x days ago, an notifies the user and administrator 2 weeks prior to locking the account. And if there are any dates more than x+y days ago, deletes the account altogether. This seems to be working for me - but I would like to use a non-proprietary solution if one is available. "Could you please share the scripts?"

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  • Multiple *NIX Accounts with Identical UID

    - by Tim
    I am curious whether there is a standard expected behavior and whether it is considered bad practice when creating more than one account on Linux/Unix that have the same UID. I've done some testing on RHEL5 with this and it behaved as I expected, but I don't know if I'm tempting fate using this trick. As an example, let's say I have two accounts with the same IDs: a1:$1$4zIl1:5000:5000::/home/a1:/bin/bash a2:$1$bmh92:5000:5000::/home/a2:/bin/bash What this means is: I can log in to each account using its own password. Files I create will have the same UID. Tools such as "ls -l" will list the UID as the first entry in the file (a1 in this case). I avoid any permissions or ownership problems between the two accounts because they are really the same user. I get login auditing for each account, so I have better granularity into tracking what is happening on the system. So my questions are: Is this ability designed or is it just the way it happens to work? Is this going to be consistent across *nix variants? Is this accepted practice? Are there unintended consequences to this practice? Note, the idea here is to use this for system accounts and not normal user accounts.

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  • "Slave" user accounts in GNU/Linux

    - by Vi
    How to make one user account to be like root for some other user account, e.g. to be able to read, write, chmod all it's files, chown from this account to master and back, kill/ptrace all it's processes and to all thinks root can, but limited only to that particular slave account? Now I'm simulating this by allowing "master" user to "sudo -u slaveuser" and setting setfacl -dRm u:masteruser:rwx ~slaveuser. It is useful as I run most desktop programs in separate user accounts, but need to move files between them sometimes. If it requires some simple kernel patch it is OK.

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  • RDP over VPN only

    - by shiva
    I know this question has been asked many a times here. But i want to gain certain perspective here. I have enabled VPN on certain systems and then can access remote system using rdp. However they can access the remote system without rdp as well. Is this because all these systems are in same lan group? How can i ensure that rdp works only when connected to vpn? I am looking at one vpn system and people should log into that system and then connect to vpn and then access remote system using rdp. I know that this can be achieved but i am not sure how to go about it. please guide me

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  • Picking up a lot of failed authentications for various accounts

    - by Josh K
    My server is getting a lot of various failed authentication attempts for various accounts. The most common one (that I've seen ) or the root account. I have since enabled Fail2Ban and ran several rootkit / malware checks to ensure I wasn't compromised. Is there anything else I should do? I only have three accounts enabled, and SSH access for only two. I have a full 48hr ban on anyone making more then six failed SSH login attempts. I do not have FTP enabled.

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  • SQL Server: how to check securables

    - by jrara
    I would like to make a t-sql query to check which logins have 'view server state' permission in server type securables. How to achieve this? This query from mssqltips don't show this: http://www.mssqltips.com/tip.asp?tip=1718 SELECT prin.[name] [User], sec.state_desc + ' ' + sec.permission_name [Permission] FROM [sys].[database_permissions] sec JOIN [sys].[database_principals] prin ON sec.[grantee_principal_id] = prin.[principal_id] WHERE sec.class = 0 ORDER BY [User], [Permission];

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  • How safe is the quicken encryption of files?

    - by jmvidal
    Quicken has a password-protection option where you type in a password and your file is encrypted. How good is this encryption and how does it depend on the length or complexity of my password? A google search reveals a lot of "quicken password recovery" programs, like this one, which make me feel like the password is just for keeping the really dumb criminals away, not the ones with large computers.

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  • Apache Probes -- what are they after?

    - by Chris_K
    The past few weeks I've been seeing more and more of these probes each day. I'd like to figure out what vulnerability they're looking for but haven't been able to turn anything up with a web search. Here's a sample of what I get in my morning Logwatch emails: A total of XX possible successful probes were detected (the following URLs contain strings that match one or more of a listing of strings that indicate a possible exploit): /MyBlog/?option=com_myblog&Itemid=12&task=../../../../../../../../../../../../../../../proc/self/environ%00 HTTP Response 200 /index2.php?option=com_myblog&item=12&task=../../../../../../../../../../../../../../../../proc/self/environ%00 HTTP Response 200 /?option=com_myblog&Itemid=12&task=../../../../../../../../../../../../../../../proc/self/environ%00 HTTP Response 301 /index2.php?option=com_myblog&item=12&task=../../../../../../../../../../../../../../../proc/self/environ%00 HTTP Response 200 //index2.php?option=com_myblog&Itemid=1&task=../../../../../../../../../../../../../../../proc/self/environ%00 HTTP Response 200 This is coming from a current CentOS 5.4 / Apache 2 box with all updates. I've manually tried entering a few in to see what they get, but those all appear to just return the site's home page. This server is just hosting a few Joomla! sites... but this doesn't seem to be targeting Joomla (as far as I can tell). Anyone know what they're probing for? I just want to make sure whatever it is I've got it covered (or not installed). The escalation of these entries has me a bit concerned.

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  • /etc/hosts.deny ignored in Ubuntu 14.04

    - by Matt
    I have Apache2 running on Ubuntu 14.04LTS. To begin securing network access to the machine, I want to start by blocking everything, then make specific allow statements for specific subnets to browse to sites hosted in Apache. The Ubuntu Server is installed with no packages selected during install, the only packages added after install are: apt-get update; apt-get install apache2, php5 (with additional php5-modules), openssh-server, mysql-client Following are my /etc/hosts.deny & /etc/hosts.allow settings: /etc/hosts.deny ALL:ALL /etc/hosts.allow has no allow entries at all. I would expect all network protocols to be denied. The symptom is that I can still web browse to sites hosted on the Apache web server even though there is a deny all statement in /etc/hosts.deny The system was rebooted after the deny entry was added. Why would /etc/hosts.deny with ALL:ALL be ignored and allow http browsing to sites hosted on the apache web server?

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  • hosts.allow and hosts.deny WHM Host Access Control - what if my IP changes?

    - by beingalex
    I want to use WHM/Cpanel's Host Access Control interface to change some settings in hosts.allow and hosts.deny. I want to block all access to our SSH exept from the IP we have from our office. Daemon Access List Action Comment sshd ALL EXCEPT x.x.x.x deny Deny access from all other IPs apart from ours But I am worried about what happens if our IP changes, which it does about twice a week. How would I get back in to edit the hosts.allow / hosts.deny files?

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  • Blocked connections passing through firewall. What is wrong?

    - by Kiranu
    In our company we have a small business router (Cisco RV082) on which we are using its standard configuration (block all incoming traffic). We also have an SMTP relay configured (using WS2008R2) so that our internal applications can send email through google apps (which requires authentication). The thing is that the server was being used to send spam. We fixed the problem by only allowing the server to relay email from our internal IP address range (10.0.0.0/16). My concern is that there was a way by which external IPs connected to the network and that underlying problem has not been fixed, but I cannot imagine how these machines connected. Any thoughts?

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  • Files deleted. What could have happened?

    - by jjfine
    I'm having a weird issue today. I was writing and testing out some simple cgi scripts this morning when I realized that I couldn't run them from one of the other computers on the (windows) network. So I had my network admin come in and take a look at what was going on. A few minutes later a co-worker came in and told me that a bunch of files he was working with as well as a bunch of others (all *.c files) on the network drive got deleted. He also noticed some strange apache_dump_500.log.txt files in the same directories where the files got deleted. The apache_dump_500.log.txt files all look like this: REDIRECT_HTTP_ACCEPT=*/*, image/gif, image/x-xbitmap, image/jpeg REDIRECT_HTTP_USER_AGENT=Mozilla/1.1b2 (X11; I; HP-UX A.09.05 9000/712) REDIRECT_PATH=.:/bin:/usr/local/bin:/etc REDIRECT_QUERY_STRING= REDIRECT_REMOTE_ADDR=<my computer's local ip> REDIRECT_REMOTE_HOST= REDIRECT_SERVER_NAME=<my computer's domain url> REDIRECT_SERVER_PORT= REDIRECT_SERVER_SOFTWARE= REDIRECT_URL=/cgi-bin/trojan.py I looked and I don't have any trojan.py in my cgi-bin folder. And all my apache logs are clean. Windows event logger seems to not have any traces of what happened either. My httpd.conf: http://pastebin.com/Yny2Yh8v I think we've got some kind of virus that added this trojan.py file to my cgi-bin, ran the script, and deleted the script and any traces from the logs. Is this a thing that happens? Any ideas whatsoever would be much appreciated!

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  • Afraid computer is not secure

    - by Michael James
    I have recently implemented LastPass as a secure password manager. When I changed the password for my email address an associated account ([email protected]) that i had never seen before came up in association with my account. It asked me if i wanted to change password for my account and the "smithfaketester" account I used Google to try and find out what is going on, but came up empty. I am afraid my computer is bot net-ed. Any input is greatly appreciated. I have used google to search for reasons why this fake account was coming up but I did not find any meaningful info.

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  • How to protect myself from promiscuous mode?

    - by Rivari
    I have read that some network adapters can switch to promiscuous mode and get all the packets sent by my router. We have multiple computers here connected to the same router. They all have the WEP key for authentification. So basicaly, this means that anyone of them, using the promiscuous mode, can see all the packets destined to others computers? That's frightening. How can I prevent this?

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  • Modern open source NIDS/HIDS and consoles?

    - by MattC
    Years back we set up an IDS solution by placing a tap in front of our exterior firewall, piping all the traffic on our DS1 through an IDS box and then sending the results off to a logging server running ACiD. This was around 2005-ish. I've been asked to revamp the solution and expand on it and looking around, I see that the last release of ACiD was from 2003 and I can't seem to find anything else that seems even remotely up-to-date. While these things may be feature complete, I worry about library conflicts, etc. Can anyone give me suggestions for a Linux/OpenBSD based solution using somewhat modern tools? Just to be clear, I know that Snort is still actively developed. I guess I'm more in the market for a modern open-source web console to consolidate the data. Of course if people have great experiences with IDS' other than Snort I'm happy to hear about it.

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  • How to decide where to purchase a wildcard SSL certificate?

    - by user664833
    Recently I needed to purchase a wildcard SSL certificate (because I need to secure a number of subdomains), and when I first searched for where to buy one I was overwhelmed with the number of choices, marketing claims, and price range. I created a list to help me see passed the marketing gimmicks that the greater majority of the Certificate Authorities (CAs) plaster all over their sites. In the end my personal conclusion is that pretty much the only things that matter are the price and the pleasantness of the CA's website. Question: Besides price and a nice website, is there anything worthy of my consideration in deciding where to purchase a wildcard SSL certificate?

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  • Securing a local server physically

    - by Daniele
    We are an online business. We have a very powerful server with hard disk mirroring in our office that we are using for a variety of internal business-critical functions. We want to keep that machine in our office but we want to make sure it is as secure as possible (within reason). Obviously we are already backing it up everyday off-site. My question is more about not-too-expensive physical measures to protect the machine against thieves and disasters such as fire. What would you suggest?

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  • How to use basic auth for single file in otherwise forbidden Apache directory?

    - by mit
    I want to allow access to a single file in a directory that is otherwise forbidden. This did not work: <VirtualHost 10.10.10.10:80> ServerName example.com DocumentRoot /var/www/html <Directory /var/www/html> Options FollowSymLinks AllowOverride None order allow,deny allow from all </Directory> # disallow the admin directory: <Directory /var/www/html/admin> order allow,deny deny from all </Directory> # but allow this single file:: <Files /var/www/html/admin/allowed.php> AuthType basic AuthName "private area" AuthUserFile /home/webroot/.htusers Require user admin1 </Files> ... </VirtualHost> When I visit http://example.com/admin/allowed.php I get the Forbidden message of the http://example.com/admin/ directory. How can I make an exception for allowed.php? If not possible, maybe I could enumerate all forbidden files in another Files directive? Let's say admin/ contains also user.php and admin.php which should be forbidden in this virtual host.

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  • rhel configure: limit root direct login to systems except through system consoles

    - by zhaojing
    I have to configure to limit root direct access except system consoles. That is, the ways of telnet, ftp, SSH are all prohibited. Root can only login through console. I understand that will require me to configure the file /etc/securetty. I have to comment all the tty, just keep "console" in /etc/securetty. But from google, I found many peoples said that configure /etc/securetty will not limit the way of SSH login. From my experiment, I found it is. (configure /etc/securetty won't limit SSH login). And I add one line in /etc/pam.d/system-auth: auth required pam_securetty It seems root SSH login can be prohibited. But I can't find the reason: What is the difference of configure pam_securetty and /etc/securetty? Can anyone help me with this? Only configure /etc/securetty could work? Or Have I to configure pam_securetty at the same time? Thanks a lot!

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  • Application runs fine manually but fails as a scheduled task

    - by user42540
    I wasn't sure if this should go here or on stackoverflow. I have an application that loads some files from a network share (the input folder), extracts certain data from them and saves new files (zips them with SharpZLib) on a different network share (output folder). This application runs fine when you open it directly, but when it is set to a scheduled task, it fails in numerous places. This application is scheduled on a Win 2003 server. Let me say right off the bat, the scheduled task is set to use the same login account that I am currently logged in with, so it's not because it's using the LocalSystem account. Something else is going on here. Originally, the application was assigning a drive letter to the input folder using WNetGetConnectionA(). I don't remember why this was done, someone else on our team did that and she's gone now. I think there was some issue with using the WinZip command line with a UNC path. I switched from the WinZip command line utility to using SharpZLib because there were other issues with using the WinZip command line. Anyway, the application failed when trying to assign a drive letter with the error "connection already established." That wasn't true and even after trying WNetCancelConnection(), it still didn't work. Then I decided to just map the drive manually on the server. Then when the app calls Directory.Exists(inputFolderPath) it returns false, even though it does exist. So, for whatever reason, I cannot read this directory from within the application. I can manually navigate to this folder in Windows Explorer and open files. The app log file shows that the user executing it on the schedule is the user I expect, not LocalSystem. Any ideas?

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