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• Is there a debian lenny patch to allow apt-get to work with sftp?

  - by MiniQuark

  I would like to write things like this in /etc/apt/sources.list: deb sftp://[email protected]/path other stuff When I try this, apt-get complains that there is no sftp method for apt: # apt-get update E: The method driver /usr/lib/apt/methods/sftp could not be found. Has anyone written a patch to add the sftp method for apt? All I could find in Google was this spec for Ubuntu. Thanks for your help.

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• Locking down a server for shared internet hosting.

  - by Wil

  Basically I control several servers and I only host either static websites or scripts which I have designed, so I trust them up to a point. However, I have a few customers who want to start using scripts such as Wordpress or many others - and they want full control over their account. I have started to do the basics - like on php.ini, I have locked it down and restricted commands such as proc, however, there is obviously a lot more I can do. right now, using NTFS permissions, I am trying to lock down the server by running Application Pools and individual sites in their own user, however I feel like I am hitting brick walls... (My old question on Server Fault). At the moment, the only route I can think of is either to implement an off the shelf control panel - which will be expensive and quite frankly, over the top, or look at the Microsoft guide - which is really for an entire infrastructure, not for someone who just wants to lock down a few servers. Does anyone have any guides that can put me on the correct path?

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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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• 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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• Router reporting failed admin login attempts from home server

  - by jeffora

  I recently noticed in the logs of my home router that it relatively regularly lists the following entry: [admin login failure] from source 192.168.0.160, Monday, June 20,2011 18:13:25 192.168.0.160 is the internal address of my home server, running Windows Home Server 2011. Is there anyway I can find out what specifically is trying to login to the router? Or is there some explanation for this behaviour? (not sure if this belongs here or on superuser...) [Update] I've run both Wireshark and netmon for a while on my home server. Wireshark captured the traffic, but didn't really show anything useful (or nothing I could make use of). A simple HTTP GET request is sent from the server (192.168.0.160) to the router (192.168.0.1), from a seemingly random port (I've seen examples from 50068, 52883), and it appears to do it twice in quick succession (incrementing port by 1), about every hour. Running netstat around the time of the failure didn't show anything (probably too long after anyway). I tried using netmon as it categorises by process, so I thought it might show a corresponding process for the port. Unfortunately, this comes in under the 'unknown' category, meaning it's basically just a slower, less useful Wireshark. I know there's not much to go on here, but does this help in anyway?

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• Has anyone had luck running 802.1x over ethernet using the stock Windows or other free supplicant?

  - by maxxpower

  I just wanted to see if anyone else has had luck implementing 802.1x over ethernet. So here's my basic setup. Switch sends out 3 eapol messages spaced out 5 seconds apart. if there's no response the machine gets put on a guest vlan with restricted access. If the machine is properly configured it will authenticate and be placed into a secure vlan. About 10% of my windows xp users are getting self assigned 169 addresses. I've used the Odyssey Access Client and it worked without a hitch. I'm using the setting to automatically use the users windows login to authenticate, but it's workign on 90% of the machines so I don't think that's the issue. Checking the logs on the dc it seems that the machines are trying to authenticate with computer credentials even though they are configured not to. I'm running Juniper switches with IAS for radius. I have radius configured for PEAP and MSvhapv2. Macs and linux boxes seem to have no issues authenticating. One last thing to add If I unplugging the ethernet cable and plug it back in usually resolves the issue, but I'd hardly call that acceptable for production. Kinda long winded and specific for a discussion, but just want to see if anyone else has had similar issues or experiences, or if anyone knows of a free XP supplicant that actually works with 802.1x over ethernet.

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• Integrate GnuPG with Outlook

  - by Rohit

  I want to integrate GnuPG with Outlook in such a way that when it receives an email, it must automatically decrypt the mail using my private key and display on-screen.

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• May the file size returned by stat be compromised?

  - by codeholic

  I want to make sure that nobody changed a file. In order to accomplish that, I want not only to check MD5 sum of the file, but also check its size, since as far as I understand this additional simple check can sophisticate falsification by several digits. May I trust the size that stat returns? I don't mean if changes were made to stat itself. I don't go that deep. But, for instance, may one compromise the file size that stat returns by hacking the directory file? Or by similar means, that do not require superuser privileges? It's Linux.

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• SQL Server NETWORK SERVICE account permissions

  - by RemotecUk

  My SQL Server Windows service is set to use the NETWORK SERVICE account. The server is installed to C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL. However looking at the permissions on that folder, NETWORK SERVICE does not have any permissions. The groups which are allowed access to that folder are... CREATOR OWNER - who is this? SYSTEM - sounds fine - so that Windows can access the folder I presume? SQLServerMSSQLUser$Computer_Name$MSSQLSERVER - this is the interesting one - what is this? Administrators Users If NETWORK SERVICE is a user with minimal permissions on the system and looks to the O/S as someone connecting from a network how does it have permissions to access any files in the SQL Server install folder? Thanks.

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• Best all in one linux based proxy,firewall, dhcp and wins server.

  - by BeStRaFe

  I help to run a lan in Sydney. We have a need for a proxy/gateway solution to allow those pesky games that require internet to work. I have been doing this with an ISA server and it has worked quite well. However now i wish to port this over to run on the same hardware as our cacti / nagios box under a vmware VM. ISA server is horridly nad due to the massive ram and i/o requirement for something is basically port blocking and handing out IP's. The needs are as follows. 1. DHCP 2. WINS (otherwise network devices fight over who is the WINS master) 3. Filtering based in PORT for outbound traffic. 4. Ability to whitelist IP/MAC's for internet access. 5. Web Interface. I had been thinking to use PFSENSE however there is no option for a WINS server and i cbf working my way around bsd.

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• what constitutes out-of-band access to a server?

  - by broiyan

  The first time I access my server with a new installation of Filezilla or Putty, I will get prompted that I should continue only if the RSA key shown to me is correct. The cloud provider has advice on their website that I ought to use their AJAX console to get a key out-of-band with which to compare to the one shown by Filezilla. The AJAX console is launched from a link on the cloud provider's website which requires a login. Exactly how is this AJAX console considered to be out-of-band when it obviously is not a form of physical access to the server?

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• Finding proof of server being compromised by Black Hole Toolkit exploit

  - by cosmicsafari

  I recently took over maintenance of a company server. (Just Host, C Panel, Linux server), theres a tonne of websites on it which i know nothing about. It had came to my attention that a client had attempted to access one of the websites hosted on this server and was met with a warning from windows defender. It had blocked access because it said the website had been compromised by the Black Hole Toolkit or something to that effect. Anyway I went in and updated various plugins and deleted some old suspect websites. I have since ran the website in question through a few online malware scanners and its comes up clean everytime. However im not convinced. Do any of you guys know extensive ways i can check that the server isn't still compromised. I have no way to install any malware scanners or anti virus programs on the server as it is horribly locked down by Just Host.

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• How to find on the Windows 7 who and when use(d) a certain share?

  - by John Thomas

  We have a workstation using Win7 on a LAN with a domain. On that workstation we set up some network shares. Can we find who used (user name and/or computer name) and when the shares? Note that we know about Computer Management System Tools Shared Folders Open Files. We don't want to see so much real-time who's using the shares but we are interested more in a logging solution, ideally interpreting / using the data from Win7's Event Viewer.

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• How to run Firefox jailed without serious performance loss?

  - by Vi

  My Firefox configuration is tricky: Firefox runs at separate restricted user account which cannot connect to main X server. Firefox uses Xvfb (virtual "headless" X server) as X server. x11vnc is running on that Xvfb. On the main X server there is vncviewer running that connect to this x11vnc On powerful laptop (Acer Extensa 5220) it seems to work more or less well, but on "Acer Aspire One" netbook it is slowish (on a background that firefox is loaded with lots of extensions). How to optimise this scheme? Requirements: Browser cannot connect to main X server. Browser should be in chroot jail (no "suid" scripts, readonly for many things) Browser should have a lot of features (like in AutoPager, NoScript, WoT, AdBlockPlus)

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• MySQL asking a user for SUPER privilege to perform a delete.

  - by Fran

  Hello, When trying to do a delete operation on a table, mysql reports the following error: Error code 1227: Access denied; you need the SUPER privilege for this operation. However, my user has this privilege granted for all tables in the schema: GRANT ALL PRIVILEGES ON myschema.* TO 'my_admin'@'%' How come it asks me for SUPER privilege for a delete? Thanks in advance.

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• How can I get a virus by just visiting a website?

  - by Janet Jacobs

  It is common knowledge that you can get a virus just by visiting a website. But how is this possible? Do these viruses attack Windows, Mac and Linux users, or are Mac/Linux users immune? I understand that I obviously can get a virus by downloading and executing a .exe in Windows but how can I get a virus just by accessing a website? Are the viruses programmed in JavaScript? (It would make sense since it is a programming language that runs locally.) If so, what JavaScript functions are the ones commonly used?

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• I want to use OpenVPN to access the web and email from China. How?

  - by gaoshan88

  My question: How do I use my already existing OpenVPN setup to enable secure, remote web surfing and email checking from open wireless hotspots? Some long winded details: I am running Ubuntu and have OpenVPN up and working fine as a server. My client machine connects fine as well. However, that just gets me a secure connection to my home network. What I want is to be able to access my VPN server and surf the web or check email securely from anywhere with an open wireless connection. I am frequently in China and having secure, unblocked access would be a boon (especially since I like to work from tea houses and coffee shops and I've already had a password sniffed and hacked once). I already know how to tunnel over SSH via a SOCKS proxy using something like: ssh -ND 8887 -p 22 [email protected] but since I have OpenVPN I figure why not try it? So... what are the steps involved in making it so I can connect to my VPN and the surf and check mail to my hearts content (slowly to be sure but at least it wold be secure). Thx!

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• Barring connections if VPN is down.

  - by Majid

  I have a VPN account and use it for sensitive communication. However the VPN connection sometimes is dropped while my main connection to the internet is still alive. The pages I visit through VPN are on HTTP (not secure) and have javascript code which pings the host every minute or so on a timer. So it happens sometimes that the VPN connection is dropped and yet js sends a request to the server (with the cookies). How could I restrict connections so they only happen if the VPN is live? Edit - Some required details were missing OS: Windows XP SP2 Browser (mostly used): Google Chrome Firewall: Windows default Sites to filter: not all traffic but all in a list of sites like abc.com, xyz.com

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• Homegroup and NTFS permissions

  - by bytenik

  I'm running a copy of Windows 7 as a "server" at my home. I have several file shares that I want to make available to specific users only. I've modified the NTFS permissions to only allow these users to access their respective shares. However, while a locally logged on user can access the actual folders just fine, over the network the remote access is authenticating as HomeGroupUser$ rather than the actual user in question, as shown by the Computer Management panel for shares. I do have matching user accounts (i.e. my username locally is abc and a parallel account with username abc and the same password exists on the server machine). I don't want to disable homegroup because there are other shares where homegroup authentication would be desirable, especially for some people where they don't have a parallel account. Is there a way to get the system to authenticate first by matching username, and then by homegroup authentication if there's no matching user?

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• Ubuntu server; Backup of server and MySql database, and Solr database

  - by Camran

  How is backup done on ubuntu servers? I have a server (Ubuntu 9.10) which has apache2 installed, php5, mysql etc... The website is a classifieds website where all classifieds are stored in mysql and Solr. I need to backup this server with all information to be able to fully restore it if something goes wrong. How should I start? Is it an automated task, or will I do backups manually? (prefer manually) Thanks

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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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• My site was recently attacked. What do I do?

  - by ChrisH

  This is a first for me. One of the sites I run was recently attacked. Not at all an intelligent attack - pure brute force - hit every page and every non-page with every extension possible. Posted with garbage data to every form and tried to post to some random urls too. All tod, 16000 requests in one hour. What should I do to prevent/alert this kind of behavior? Is there a way to limit the request/hr for a given ip/client? Is there a place I should be reporting the user to? They appear to be from China and did leave what seems like a valid e-mail.

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• how to detect device type from connected device to router?

  - by molly

  i have a att router and there is an unknown device connected to my network. i cant seem to kick it off because of how att's router settings are created which is kind of dumb. i am able to see its local ip and mac address. i am on a mac with snow leopard. how can i get more information on the device with the information that i have? i want to see what kind of device it is, i have checked all deviced that are connected to the router and non seem to match the local ip that is connected. i have wpa encryption setup with a strong password.

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• How can I read password protected Word files on OS X ?

  - by Ohad

  I receive Word documents by mail and read them using the built-in Gmail reader. Sometimes the documents are password protected and I need to obtain access to a Windows machine with Office installed in order to read them. Is there a quicker / less hassle requiring method ? I don't want to have to install Vmware / Parallels nor Office on my fresh and sterile macbook.

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• Can Solaris RBAC roles be ported to Linux using SElinux only?

  - by Jimmy

  We are migrating an application from Solaris to Linux and the main user is allowed, through the use of RBAC roles, to run a few system commands like svccfg/svcadm (chkconfig on redhat). Is it possible, using only SElinux (no sudo), to allow a normal user to run chkconfig off/on (basically give it the ability to add remove services) ? My approach was to try to create an SElinux user with a corresponding SElinux role that manages the app's domain/type and is allowed to transition to all other domains required to run chkconfig, tcpdump or any other system utility usually restricted to root access only. All my attempts so far have failed, so my second question would be where could I find good documentation that applies to this specific problem ?

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