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• cPanel configuration appears to allow unauthenticated SMTP - how to fix?

  - by ttsiodras

  One of my clients is using a cPanel-based Virtual Dedicated Server that appears to allow unauthenticated SMTP: bash$ echo EHLO | nc mail.clientscompany.com 25 ... 250-SIZE 52428800 250-PIPELINING 250-AUTH PLAIN LOGIN 250-STARTTLS 250 HELP It therefore appears that anyone (esp. spammers) can use his mail server to send whatever - I just connected from my DSL connection at home, and... bash$ nc mail.clientscompany.com 25 HELO clientscompany.com MAIL FROM: [email protected] RCPT TO: [email protected] DATA From: <[email protected]> To: <[email protected]> Date: ... Subject: ... Blah . QUIT I just tested this, and sure enough, it sent a mail from "[email protected]". Since I am not familiar with cPanel and WHM, can someone provide pointers to configure his mail server to (a) only accept TLS connections and (b) only authenticated ones (i.e. with user/password, not just plain connections). Thanks for any help.

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• DB Object passing between classes singleton, static or other?

  - by Stephen

  So I'm designing a reporting system at work it's my first project written OOP and I'm stuck on the design choice for the DB class. Obviously I only want to create one instance of the DB class per-session/user and then pass it to each of the classes that need it. What I don't know it what's best practice for implementing this. Currently I have code like the following:- class db { private $user = 'USER'; private $pass = 'PASS'; private $tables = array( 'user','report', 'etc...'); function __construct(){ //SET UP CONNECTION AND TABLES } }; class report{ function __construct ($params = array(), $db, $user) { //Error checking/handling trimed //$db is the database object we created $this->db = $db; //$this->user is the user object for the logged in user $this->user = $user; $this->reportCreate(); } public function setPermission($permissionId = 1) { //Note the $this->db is this the best practise solution? $this->db->permission->find($permissionId) //Note the $this->user is this the best practise solution? $this->user->checkPermission(1) $data=array(); $this->db->reportpermission->insert($data) } };//end report I've been reading about using static classes and have just come across Singletons (though these appear to be passé already?) so what's current best practice for doing this?

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• How can I restore GRUB without a live CD?

  - by Looterguf

  I realize that this is a duplicate of a question asked before, but in that question the asker managed to find his live CD and no real answer appeared, thus I am re-asking it. I managed to screw up my GRUB by deleting two linux partitions on my hard drive from windows. After this, GRUB gives the error "partition not found", and gives me the grub-rescue prompt. The only command I have found to work in this is 'ls', which spits out my partitions. I would use the live CD fix, but I am in India, and all my live CDs are back home in the US... What I've got is an internet connection, a 4GB flash drive with Flow OS installed (which I am currently using but can wipe if need be), and a working laptop that I can borrow. What should I do?

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• Mail.app slow to include new messages

  - by Chris Tompsett

  With Leopard I was able to link to the University's Exchange 2003 server with and IMAP connection and mail out directly vie the SMTP client. With Snow Leopard I attempted to update to a full Exchange service (Exchange 2007). Almost all has worked OK (ical, address, etc.) except that new mail posted to my email account, which is visible using a 'web' interface to Exchange remains invisible for some random number of hours. Those who are running the Exchange server have no interest in discussing the problem. Has anyone else had a similar experience?

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• Disable Network settings (TCP/IP & DNS) on Windows 7 Ultimate

  - by TiD91

  i also read this discussion here How to disable Tcp/Ip settings in windows 7 via GPO? about what i want to do but i still have problems. So here i am: i have a desktop pc with two accounts, both with Administrative rights. One is used by the entire my family, in particular by my brother. The problem is that i set some DNS and IP configurations to let be possible the VNC connection from remote. Now i would like to disable the network settings (TCP/IP and DNS) to prohibit my brother to change it preventing me to connect to it. So how can i do this? I set the policies from GPO but i still can change these settings from his account. Here's a pic of Registry Keys: http://imageshack.us/a/img339/3310/famigliapc2012092017274.png what didn't i do? Thanks in advance for your help. Rub|TiD

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• Nagios: Is it possible to have multiple IPs for a host?

  - by Aknosis

  In our office we have dual WAN setup, if our cable connection drops we still get connectivity via our T1. The only issue is that our office network is no longer available on the same IP so all Nagios check go critical because they can't connect. What'd be awesome is if I could have Nagios try IP 1 by default but if for some reason its failing on that IP try IP 2. I doubt this is possible with a default install but I'm wondering if there is any add-ons or some other magic that could make this work?

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• cPanel IPTables custom rules

  - by James Haigh

  Hi, I'm trying to allow a host access to port 3306 by IP. I've added the rule and ran an iptables-save and also service iptables save. These commands show as "OK" with no reported errors. And this works absolutely fine. Now, the server hasn't been restarted at all since I've been having this problem, but every day when I start developing on the server that needs mySQL access, it reports that the connection is refused. Back on the mySQL server, all I need to do is service iptables restart and everything then works as normal. The mySQL server is a CentOS cPanel VPS running on OpenVZ. Anyone know how I can make these rules persist? Is it something cPanel is doing overnight that is messing with my config? Thanks.

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• Remotely running batches on a Windows PC

  - by Eduardo León

  I want to remotely control my home desktop PC (running Windows 7 Professional), mainly to perform the following tasks: Downloading email attachments, and sending emails with attachments Running UI-less programs whose only inputs are files and whose only outputs are files So far, the only solution I have found is to use Remote Desktop to connect to my PC, but this is very slow and inefficient, especially when there is no fast Internet connection available other than my cell phone's. I would like to be able to send batch commands to my PC, like: Download an email attachment Use it as input for an UI-less program Save the program's output to a file Send that file to myself as an email attachment Is this possible? How could I do it?

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• SSH disconnects active session after 20 minutes

  - by Paramaeleon

  I’ve just set up a new Linux box (OpenSuSE 12.3 on VmWare). Now I stated that my SSH shell sessions are disconnected exactly after 20 minutes, clearly with activity. (Putty: “Network error: Software caused connection abort”) I already set Putty to send keep alives every 64 sec. In sshd_config, I set ClientAliveInterval 50 ClientAliveCountMax 2 and did a deamon reload. Didn’t help. About two minutes after the link breakdown, ssh reports to /var/log/messages: … … sshd[…]: Timeout, client not responding. … … sshd[…]: pam_unix(sshd:session): session closed for user root I don’t encounter this behaviour when connecting to other virtual machines, so I guess the problem isn’t in the network. Any help is appreciated.

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• Microsoft Outlook 2007 Limit attachment size

  - by tasmanian_devil

  I have qmail server and authetication on Active Directory. All clients use Microsoft Outlook 2007 as default mail client. A have one central location and several remote location wich are connected with slow link speed connection. I have attachment limit on qmail, but i have problem when client attach file localy and send mail, attachment is been uploaded to qmail server and rejected because exceeded limit. Is it possible to limit attachment localy on MS Outlook 2007? I know that Office 2010 have attachment limitation but i think that is not working on Office 2007.

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• Approach to Authenticate Clients to TCP Server

  - by dab

  I'm writing a Server/Client application where clients will connect to the server. What I want to do, is make sure that the client connecting to the server is actually using my protocol and I can "trust" the data being sent from the client to the server. What I thought about doing is creating a sort of hash on the client's machine that follows a particular algorithm. What I did in a previous version was took their IP address, the client version, and a few other attributes of the client and sent it as a calculated hash to the server, who then took their IP, and the version of the protocol the client claimed to be using, and calculated that number to see if they matched. This works ok until you get clients that connect from within a router environment where their internal IP is different from their external IP. My fix for this was to pass the client's internal IP used to calculate this hash with the authentication protocol. My fear is this approach is not secure enough. Since I'm passing the data used to create the "auth hash". Here's an example of what I'm talking about: Client IP: 192.168.1.10, Version: 2.4.5.2 hash = 2*4*5*1 * (1+9+2) * (1+6+8) * (1) * (1+0) Client Connects to Server client sends: auth hash ip version Server calculates that info, and accepts or denies the hash. Before I go and come up with another algorithm to prove a client can provide data a server (or use this existing algorithm), I was wondering if there are any existing, proven, and secure systems out there for generating a hash that both sides can generate with general knowledge. The server won't know about the client until the very first connection is established. The protocol's intent is to manage a network of clients who will be contributing data to the server periodically. New clients will be added simply by connecting the client to the server and "registering" with the server. So a client connects to the server for the first time, and registers their info (mac address or some other kind of unique computer identifier), then when they connect again, the server will recognize that client as a previous person and associate them with their data in the database.

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• Start a VPN session using a Terminal script

  - by craibuc

  I use an OSX Terminal session to start a VPN connection. The command that I execute at the prompt is: /etc/netlock/cvc -c :: This works as expected. I would like to save this to a script file that I can simply double-click to start. I created a file, 'vpn.command', added the command (list above), save it, and given execute permission: chmod +x vpn.command When I double-click the file, Terminal opens a BASH shell, executes the command, then exits. Upon closer inspection, the command is now '/etc/netlock/cvc -c ::; exit;' Why is the extra '; exit;' appended to my command? BTW, is there a way to execute another command, /etc/netlock/cvc -d, when the Terminal session is being closed so I can close the VPN automatically?

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• Web Content Filtering for Windows Clients

  - by djoyce

  I'm working with a small business to solve a bunch of problems. One is their Windows 7 POS registers need to have web access restricted to only three remote support sites, but the back office machine needs an unfiltered connection. I'd like something I can install and configure on the few registers to block all but those few sites. In a perfect world this would restrict the normal register user, but the admin user would not be filtered. Free is best, if it works, but a small fee would be alright too. Microsoft's Family Safety filter is close, but requires a Windows Live account, which isn't ideal, but may be alright. Anyone use this in a small business environment? I'd prefer something easily managed at the local machines. K9 Web Protection is interesting and I'm going to look into it more. Are there other options? Seems like someone would have made something simple like this as an open source project, but maybe not.

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• Why doesn't phpMyAdmin connect to MySQL server?

  - by Grafica

  I'm running xampp on Windows 7, and when I type localhost/phpmyadmin, there is an error: phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server. Here's what I did, but I'm still not able to connect: In config.inc.php, changed from true to false: $cfg['Servers'[$i]['AllowNoPassword'] = false; Changed password here: localhost/security/xamppsecurity.php In resetroot.bat, typed new password where it says 'password': echo REPLACE INTO user VALUES ('localhost', 'pma', 'password', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', '', '', '', '', 0, 0, 0, 0, '', ''); >>resetroot.sql Restarted apache and mySQL I still get the same error message. Thanks in advance!

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• Forward public port to localhost

  - by Dan

  I have a process running on my Ubuntu 12.04 server that insists on binding to a public IP address. I only want it accessible from localhost, and NOT the outside world. I've been trying to work out a way to forward 1.2.3.4:8888 to 127.0.0.1:8888. I saw something about iptables not wanting to forward connections to loopback, and I haven't been able to make it work with xinetd either. It's also important that the connection not only be available on localhost, but be inaccessible on the interface it's trying to run on. Is this even possible?

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• Windows server 2003SP2 as LDAP replica master for Mac OSX 10.6

  - by FrancoR

  Hello there, we have a single domain controller with Windows 2003 with few child. All the users are in the main DC. We have already created a connection from AD to Mac Xserve 10.6 and can read all the users, but: 1. If the DC goes down (or the net), Mac lose all the users, so no file access, no emails, no nothing. 2. the users are in read only. Mac admin cannot reset password, change attribute and so on. What we need is a stable environment where both AD admins and LDAP admins can manage the users; if one server goes offline the users of the other server should work (email, shared folders) just fine. Thanks in advance P.S. we already tried to connect the MacOSX to Windows LDAP, instead of AD, but we're unable to do it: MacOSX requires DNS IP (gotcha), user admin and password (ok) and a root LDAP password we're unable to find any reference of it in Windows 2003.

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• How can I tell how many bits my ssh key is?

  - by yairchu

  I already created an ssh key for myself sometime in the past. I don't remember "how many bits" it is. How can I tell? I'm wondering because I'm using hosting at nearlyfreespeech.net and their faq says: Can I configure my ssh connection to use a public key? ... we will not install keys that have a length less than 1536 bits ... We prefer that you use a key at least 2048 bits in length, and if you are generating a new key, the recommended length is 4096 bits.

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• Using the RadTransitionControl in Task-It

  Download Source Code NOTE: To run the source code provided your will need to update to the RC (release candidate) versions of Silverlight 4 and VisualStudio 2010.  In a recent Ask the Experts webinar I showed a simple solution that had similarities to one that I had used in my recent MVVM post, but had a few extra twists on it. I have since been asked if I could post the source code for this demo, so here it is (I am using similar techniques in my Task-It application). The database Before running the code for this app you will need to create the database. First, create a database called MVVMProject in SQL Server, then run MVVMProject.sql in the MVVMProjectDemo/Database directory of your downloaded .zip file. This should give you a Task table with 3 records in it. You will also need to update the connection string in web.config to point to your database ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Linux periodically "losing" ability to connect to server via SSH?

  - by gct

  I know this isn't exactly a programming question, but it popped up in my use of git for programming projects at least. I've got a web server that I use to host my git repos on, but my ubuntu box seems to "lose" the ability to connect to it via SSH. I'll get a "connection refused" error when I try to ssh or use git. Rebooting my local machine will fix the problem, but only temporarily. I can still connect to the web interface just fine, and the problem manifests with other servers as well. I've been working around it by pulling my changes over to my laptop and pushing from there, but that's sub-optimal as you can imagine. Has anyone seen something like this? I'd be tempted to say it's some kind of IP caching problem, but I can't connect even using the IP address of the server directly... Running Ubuntu 9.04

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• ADSL improvement in recent years

  - by cleong

  Currently I have a 2mb/s ADSL connection. I signed up for the service more than five years ago. Has technology improved much during that time to allow for greater speed using the same wires? The building I live in is quite old and the lines aren't very good. They weren't able to support 6mb/s service back then. Now I notice that the lowest speed offered by my telco is 10mb/s. Even that would be a serious improvement over what I have now. Here are the stats from the modem: Line Attenuation (Up/Down) [dB]: 10,5 / 15,5 SN Margin (Up/Down) [dB]: 31,5 / 29,0

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• How to run long time process on Udev event?

  - by neclude

  (sorry for my bad english) I want run ppp connection when my usb modem is connect. so i use next udev rule: ACTION=="add", SUBSYSTEM=="tty", ATTRS{idVendor}=="16d8",\ RUN+="/usr/local/bin/newPPP.sh $env{DEVNAME}" (my modem appear in /dev as ttyACM0) newPPP.sh: #!/bin/bash /usr/bin/pon prov $1 >/dev/null 2>&1 & Problem: udev event fire, newPPP.sh running, BUT newPPP.sh process will be killed after ~4-5s. ppp not have time to connect. (in it params is timeout 10s for dial up). How can i run long time process, that will not be killed? (I was try nohup. It don't work too.) System: Arch Linux

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• iptables redirect single website traffic to port 8080

  - by Luke John Southard

  My goal is to be able to make a connection to one, and only one, website through a proxy. Everything else should be dropped. I have been able to do this successfully without a proxy with this code: ./iptables -I INPUT 1 -i lo -j ACCEPT ./iptabels -A OUTPUT -p udp --dport 53 -j ACCEPT ./iptables -A OUTPUT -p tcp -d www.website.com --dport 80 -j ACCEPT ./iptables -A INPUT -m conntrack --cstate ESTABLISHED,RELATED -j ACCEPT ./iptables -P INPUT DROP ./iptables -P OUTPUT DROP How could I do the same thing except redirect the traffic to port 8080 somewhere? I've been trying to redirect in the PREROUTING chain in the nat table. I'm unsure if this is the proper place to do that tho. Thanks for your help!

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• Power outage during disk wipe. What do I do now?

  - by Mark Trexler

  I was using Roadkil Diskwipe on an external hard drive and the power went out. I had removed it from any outlet connection by the time power was restored to prevent power-spike damage (it's on a surge protector, but I didn't want to rely on that). My question is, where do I go from here? Obviously I don't care about preserving any data currently on it, I just want to make sure the drive itself is not terminally damaged. I'm running chkdsk (full), but I don't know if that's the correct step to assessing any damage. If it makes any difference, the hard drive was unallocated at the time of the outage, as Diskwipe requires that for it to run. Also, could something like this cause latent problems with the drive itself (i.e. serious issues that I won't be aware of when testing it now). I'd appreciate any program recommendations if chkdsk is not the most appropriate diagnostic route. Thank you.

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• IPP Printing from Windows 7 Ultimate

  - by Casey

  I have network IPP working on Ubuntu and Windows XP. On my Windows 7 instance, it refuses to acknowledge the remote server connection. Can anyone suggest how to configure this correctly? My install steps are: Add Printer Add a Local Printer Create a New Port and "Standard TCP/IP Port" Enter hostname http://host:631/printers/Printer_Name After that it says the printer is not detected, asks me to pick a driver, and finish up. Trying to use the device does not produce any output? If anyone has got this work, I would really appreciate a fix.

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• Securing internal data accessed by a website on the big, bad internet

  - by aehiilrs

  A close relative of this question on Stack Overflow: When you have a web site in your DMZ that needs to access production data stored on an internal DB, what strategies do you recommend using to lower the risks that come from accessing live data? Is it even considered acceptable to have a connection initiated from the DMZ come inside of your network? An extra detail about the nature of the site that kind of throws a monkey wrench into the machinery is that people using the web site will be competing for "spots" on a first-come, first-serve basis with others using the internal software. Because of this, as close to zero lag time between the two applications as possible is ideal.

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