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• Basic IIS7 permissions question

  - by Tom Gullen

  We have a website, with a file: www.example.com/apis/httpapi.asp This file is used by the site internally to make requests joining two systems on the website together (one is Classic ASP, the other ASP.net). However, we do not want the public to be able to access the file. In IIS7.5, is there a setting I can do to make this file internal only? I've tried rewriting the URL for it but this rewrite is also applied internally so the scripts stop working as they fetch the rewritten url. Thanks for any help!

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• Prevent registry changes by users

  - by graf_ignotiev

  Background: I run a small computer lab of 10 computers using Windows 7 x64 Enterprise. Our users are set up as limited users. For additional restrictions, I set up local group policy for non-administrators using the microsoft management console. Problem: Recently, I found out that some of these restrictions had been removed. Reviewing the settings MMC and in ntuser.pol showed that the settings should still be in place. However, the related registry settings were missing in ntuser.dat. I already have registry editing disabled in the GPO (though not in silent mode). Question: What is the best way to deal with this situation? Should I look into preventing registry setting changes? Should I set up registry auditing to found out how these keys are getting changed in the first place? Or should I give up the ghost and write some kind of logon script that enforces registry values if they've been change? Any other ideas?

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• Kernel Log "TCP: Treason uncloaked!"

  - by hurikhan77

  On one linux server (Gentoo hardened), we are experiencing bursts of the following messages in dmesg from time to time: TCP: Treason uncloaked! Peer xx.xx.xxx.xxx:65039/80 shrinks window 4094157295:4094160199. Repaired. Is there anything we should take care of or is this normal? Update: Maybe related, we are using net.ipv4.tcp_congestion_control = cubic. Kernel version is 2.6.28 with Gentoo hardening patches.

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• SMTP hacked by spammer using base64 encoding to authenticate

  - by Throlkim

  Over the past day we've detected someone from China using our server to send spam email. It's very likely that he's using a weak username/password to access our SMTP server, but the problem is that he appears to be using base64 encoding to prevent us from finding out which account he's using. Here's an example from the maillog: May 5 05:52:15 195396-app3 smtp_auth: SMTP connect from (null)@193.14.55.59.broad.gz.jx.dynamic.163data.com.cn [59.55.14.193] May 5 05:52:15 195396-app3 smtp_auth: smtp_auth: SMTP user info : logged in from (null)@193.14.55.59.broad.gz.jx.dynamic.163data.com.cn [59.55.14.193] Is there any way to detect which account it is that he's using?

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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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• Securing ColdFusion for internet facing server

  - by Goyuix

  What do I need to do to tighten down a ColdFusion server for internet facing apps? The only thing that specifically came to mind was to restrict the CFIDE and JRunScripts directories to a local subnet. Are there settings in the administrator I can tweak to make the applications more secure?

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• Windows Server 2012 - SSL Cypher Suite Order Not Long Enough

  - by Sam

  I want to re-order the cypher suites on our new Windows Server 2012 box to help mitigate the BEAST vulnerability for our clients. I went to Local Group Policy => Computer Configuration => Administrative Templates => Network => SSL Configuration Settings, opened SSL Cypher Suite Order, enabled it, and copied the values from the SSL Cypher Suites textbox. I pasted them into notepad, re-ordered them, then copied+pasted them back into the SSL Cypher Suites textbox. However, the box isn't long enough to hold them all, despite the fact that the length didn't change. I would have to drop the last 3 cyphers (SSL_CK_DES_192_EDE3_CBC_WITH_MD5,TLS_RSA_WITH_NULL_SHA256,TLS_RSA_WITH_NULL_SHA) in order for it to fit. Should I just drop them? Other ideas?

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• Benefits of separating operating system files from user files onto different partitions

  - by Paul

  I am in the process of hardening a CentOS box, and came across an article that suggested mounting these filesystems onto different partitions: /usr /home /var and /var/tmp /tmp I was wondering what exactly this accomplishes, in terms of securing the box?

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• What is the best Web Application Firewall for IIS?

  - by user30850

  What is the best Web Application Firewall(WAF) for IIS? What makes it better than the others? How useful is it at blocking attacks against poorly written code, otherwise known as an Intrusion Prevention System (IPS)? WAFs are required by the PCI-DSS, so if I have to get one, then it should the best one.

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• When a server gets rooted, should I disconnect network or power?

  - by Aleksandr Levchuk

  When a server gets rooted (e.g. a situation like this), one of the first things that should be done is containment. Quoting from Robert Moir's Answer: "disconnect the victim from its muggers" A server can be contained by pulling the network cable or the power cable. Taking into consideration the need for: Protecting victims from further damage Executing successful forensics (Possibly) Protecting valuable data on the server Which method is better?

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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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• Bacula Director and Storage in LAN

  - by B14D3

  I have two networks LAN and DMZ.. Machines in DMZ are accesible from internet ( only over http). In LAN I have servers that see all LAN and all DMZ machines but machinse from DMZ don't see any LAN servers. Machines in LAN have access only to all LAN and DMZ, no direct access to internet and no access from internet. DMZ <------ LAN DMZ ----X--->LAN I'm planning to configure Bacula as major backup system. My plan is to install Bacula Director and Storage deamon on the same server in LAN for safety reasons. So my question is: Will this configuration work, is it posible for bacula director and storage deamon installed on server in LAN to makes backup servers that are in my DMZ? Or in this network configuration Bacula should be in DMZ? (If yes will I can backup with it servers in LAN ?)

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• How can I get a data usage/access log for an external hard-drive?

  - by Vittorio Vittori

  Hello, I'm working in an office with many people and sometimes I leave my external hard drive with my personal data inside. I would to know if there is some way to see if my hard disk was used during my absence. I'm not the computer administrator, so I can't use exclusive file permissions and I would really like to know hard disk is opened from another computer. I am using a Mac. Does exist some other way to protect personal data on usb device like an hard-drive? If yes can you write some link to possible guides? I hope there is some ploy!!

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• Preparing laptops for theft

  - by ccook

  With a number of laptops out there the likelihood of one being stolen is high. What methods, preferably free, can be used to secure the data on the computers? The laptops do not have any special hardware on them, and generally keep their user data in a dropbox folder. One small step taken is to have the the dropbox folder encrypted by Windows 7. Any additional suggestions are greatly appreciated. The data in the dropbox folder is sensitive.

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• Account to read AD, join machine to domain, delete computer accounts and move computers to OUs

  - by Ben

  I want to create an account that will perform the following: Join computers to a domain (not restricted to 10, like a normal user) Check for computer accounts in AD Delete computers from AD Move computers between OUs I don't want to allow it to do anything else, so don't want a domain admin account. Can anyone guide me in the right direction in terms of permissions? Not sure if I should be using delegation of control wizard? Cheers, Ben

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• Protecting PHP packages on server

  - by Jack

  Hi, I am a php developer and have recently decided to make one of my Magento extensions commercial. I have downloaded and configured MageParts CEM Server and that is all working perfectly in regard to licencing and delivery of module packages. The only issue is that the directory that the packages are stored in could be accessed by anyone. I tried this in a .htaccess file, but now it is not working. <Files services.wsdl> allow from all </Files> deny from all Clients are receiving a 403 Forbidden response. Have I done something wrong in the .htaccess file or would there be a better way to secure the directory? Any help would be greatly appreciated.

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• How to ACTUALLY install Java on Linux?

  - by Camran

  I have a Ubuntu Server. From the terminal, how should I install JDK? In this guide it says to use this command: sudo apt-get install sun-java6-bin sun-java6-jre sun-java6-jdk But on Suns website, it says JDK includes the JRE, so why the JRE in the line above? Anybody know how to actually install Java? Every guide and every forum shows different ways of doing it. BTW: It is a VPS (virtual private server) Thanks

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• What will happen if I (accidentaly) pour a bucket of water inside my pc?

  - by ULTRA_POROV

  Is it dangerous what will happen to me and the PC? EDIT: It's a serious question, the other day i almost spilled a bottle of cola inside my pc (the case was open).

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• hardening a server: disallow password-login for sudoers and log unusual ips

  - by Fabian Zeindl

  Two question regarding sudo-login into an ubuntu-system (debian tips welcome as well): Is it possible to require sudoers on my box to only login with publickey-authentication? Is it possible to log which ip sudoers log in from and check that for "unusual activity" or take actions? I'm thinking about temporarily removing sudo-rights if sudoers don't log in from whitelisted IPs. Or is that too risky to be exploited?

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• Encrypted WiFi with no password?

  - by Ian Boyd

  Is there any standard that allows a WiFi connection to be encrypted, but not require a password? i know that (old, weak) WEP, and newer WPA/WPA2 require a password (i.e. shared secret). Meanwhile my own wireless connections are "open", and therefore unencrypted. There is no technical reason why i can't have an encrypted link that doesn't require the user to enter any password. Such technology exists today (see public key encryption and HTTPS). But does such a standard exist for WiFi? Note: i only want to protect communications, not limit internet access. i get the sense that no such standard exists (since i'm pretty capable with Google), but i'd like it confirmed. Claraification: i want to protect communcations, not limit internet access. That means users are not required to have a password (or its moral equivalent). This means users are not required: to know a password to know a passphrase to enter a CAPTCHA to draw a secret to have a key fob to know a PIN to use a pre-shared key have a pre-shared file to possess a certificate In other words: it has the same accessibility as before, but is now encrypted.

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• How to run specific program with root privileges (Ubuntu OS) when no sudo user log into system?

  - by makulia

  How to run specific program with root privileges (Ubuntu OS) when no sudo user log into system? Program need root privileges to function correctly. Normal user shouldn't be able to shutdown this process. For example, I have to users. Admin and Client. Program should start only when Client log into system. It needs root privileges and Client shouldn't be able to shut this process down.

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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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• hosts.deny not working

  - by Captain Planet

  Currently I am watching the live auth.log and someone is continuously trying the brute force attack for 10 hours. Its my local server so no need to worry but I want to test. I have installed denyhosts. There is already an entry for that IP address in hosts.deny. But still he is trying the attacks from same IP. System is not blocking that. Firstly I don't know how did that IP address get entered in that file. I didn't enter it, is there any other system script which can do that. hosts.deny is sshd: 120.195.108.22 sshd: 95.130.12.64 hosts.allow ALL:ALL sshd: ALL Is there any iptable setting that can override the host.deny file

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• Which ports to open on domain vs internet

  - by zsharp

  I have a web server/database/domainController. I notice that ports 137 and 138 on the public IP AND private IP are open on all machines there are also other open ports on 0.0.0.0.(ie. 135, 2002) Can and should I close 137-139 on the public IP only? will that interfere with any services.

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• Can I build a VPN on top of Tor?

  - by Thilo

  If I understand correctly, the Tor client works as a combination of a proxy server and application plugins (such as the Firefox Torbutton) that enable use of the proxy and contain additional application-specific privacy features (such as suppressing cookies, sandboxing JavaScript, turning off Flash). That works very well with applications that support it (such as Firefox). But is there a way to establish a VPN over Tor, so that my whole Wifi network can be protected, including applications that do not support proxy configuration and devices like iPod touches?

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