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• OpenVPN Keeps Crashing

  - by Frank Thornton

  Oct 20 21:00:44 sb1 openvpn[2082]: <MY_IP>:28523 [vpntest] Peer Connection Initiated with [AF_INET]<MY_IP>:28523 Oct 20 21:00:44 sb1 openvpn[2082]: vpntest/<MY_IP>:28523 MULTI_sva: pool returned IPv4=10.8.0.6, IPv6=(Not enabled) Oct 20 21:00:44 sb1 openvpn[2082]: <MY_IP>:28522 WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1576', remote='link-mtu 1376' Oct 20 21:00:44 sb1 openvpn[2082]: <MY_IP>:28522 WARNING: 'tun-mtu' is used inconsistently, local='tun-mtu 1532', remote='tun-mtu 1332' Oct 20 21:00:45 sb1 openvpn[2082]: <MY_IP>:28522 [vpntest2] Peer Connection Initiated with [AF_INET]<MY_IP>:28522 Oct 20 21:00:45 sb1 openvpn[2082]: vpntest2/<MY_IP>:28522 MULTI_sva: pool returned IPv4=10.8.0.10, IPv6=(Not enabled) Oct 20 21:00:46 sb1 openvpn[2082]: vpntest/<MY_IP>:28523 send_push_reply(): safe_cap=940 Client File: client dev tun proto tcp remote <IP> 443 resolv-retry infinite nobind tun-mtu 1500 tun-mtu-extra 32 mssfix 1410 persist-key persist-tun auth-user-pass comp-lzo SERVER: port 443 #- port proto tcp #- protocol dev tun tun-mtu 1500 tun-mtu-extra 32 reneg-sec 0 #mtu-disc yes mssfix 1410 ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt cert /etc/openvpn/easy-rsa/2.0/keys/server.crt key /etc/openvpn/easy-rsa/2.0/keys/server.key dh /etc/openvpn/easy-rsa/2.0/keys/dh1024.pem plugin /etc/openvpn/openvpn-auth-pam.so /etc/pam.d/login #plugin /usr/share/openvpn/plugin/lib/openvpn-auth-pam.so /etc/pam.d/login #- Comment this line if you are using FreeRADIUS #plugin /etc/openvpn/radiusplugin.so /etc/openvpn/radiusplugin.cnf #- Uncomment this line if you are using FreeRADIUS client-to-client client-cert-not-required username-as-common-name server 10.8.0.0 255.255.255.0 push "redirect-gateway def1" push "dhcp-option DNS 8.8.8.8" push "dhcp-option DNS 8.8.4.4" keepalive 3 30 comp-lzo persist-key persist-tun What is causing the VPN to keep dropping the connection and then reconnecting?

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• Plesk: Spamassassin ignores emails to redirected accounts

  - by Mat

  When I set up email redirects within Plesk 9.5, Spamassassin ignores all emails sent to the redirected address and only scans emails that are sent directly to the address which has a mailbox. Steps to reproduce Set up two mail accounts: [email protected] as a proper email account with a mailbox and [email protected] with all emails redirected to [email protected]. (It doesn't make a difference, if [email protected] has a mailbox enabled or not.) [email protected] -> [email protected] Set up the spam filter on both accounts. I set mine to delete spam right away, but you can just keep the default ("mark as spam"). Now, when you send an emails to [email protected], it will have Spamassassins tags in the email header, but when you send emails to [email protected], they will end up in the same mailbox but will have no spamassassin tags in the emails header and they will not be scanned. Other notes I am using Plesk 9.5.4 on Ubuntu 8.04 LTS with the default Qmail. I've observed this bug since Plesk 8, but I can't stand it any more and would appreciate any hack or fix.

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• Thundrbird 3: can't change column width?

  - by rumtscho

  I recently installed Thunderbird 3.0.3. Just noticed a suboptimal UI setting: in the upper pane, which lists the e-mails in the current folder, the Date column is about 200px wide. So when I keep the window at 480x600, all I see in a row is: | tree icon | favourites icon | attachment icon | read icon | junk icon | Date and time, followed by 5cm whitespace | ... | P Where "P" is the first letter of the name of the sender. And the "..." is actually shown this way, I have no idea which column it is meant to be. But I don't see neither the sender, nor the message subject, which makes scrolling a folder for a certain mail rather pointless. I see these when I maximize the window, actually the columns are then not only bigger, they are arranged in another sequence. But I feel that holding a mail client permanently maximised at 1600x1200 is a waste of screen real estate. My naive solution attempt was to try to go with the mouse cursor to the right edge of the date column and try to shrink it by moving the cursor left while holding down the left mouse button. Not only is this default behaviour for all resizable columns I've ever encountered in GUIs, the cursor actually turns into a horizontal double-headed arrow. But pulling has no effect at all. I cannot make a wide column narrow, and I cannot make the narrow columns wide. I didn't find anything in the preferences either. So can please somebody explain how to get the columns arranged sensibly?

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• Running a service with a user from a different domain not working

  - by EWood

  I've been stuck on this for a while, not sure what permission I'm missing. I've got domain A and domain B, A trusts B, but B does not trust A. I'm trying to run a service in domain A with a user account from domain B and I keep getting Access is Denied. I'm using the FQDN after the username and the password is correct. The user account from domain B is a local administrator on the domain A server, the user account has the logon locally, and as a service permissions. Must. Get. This. Working. Update: I found something interesting in the logs I must have missed. This ought to get me pointed in the right direction. Event ID: 40961 - LsaSrv : The Security System could not establish a secured connection with the server ldap/{server fqdn/fqdn@fqdn} No authentication protocol was available. I've found a few fixes for 40961 but nothing has worked so far. I've verified reverse lookup zones. nslookup resolves the correct dc properly. still workin' at it. Upadte: In response to Evan; I ran " runas /env /user:ftp_user@fqdn "notepad" " then entered the users password and notepad came up. It seems to work successfully. This issue is now resolved. The problem is visible in the screenshot. Windows tries to use the UPN for the user account if you dig your user out of AD with the Browse button. This fails every time even with the right user and password. Simply using the SAM format (Domain\User) works. So simple, yet so annoying. Can't believe I missed this. Thanks to everyone who helped.

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• Save and restore multiple layers within a Photoshop action that flattens

  - by SuitCase

  I'm editing comic pages with layers - "background", "foreground", "lineart" and "over lineart". I have a Photoshop action that includes a Mode-Bitmap command, which requires the image to be flattened. I need this part of the action because I use the Halftone Screen method of reducing the greyscale image to bitmap on the "background" layer, creating a certain effect. I am pretty sure there is no filter or anything else that gives the same effect. After the mode is changed to bitmap, my action changes things back to greyscale for further changes. This poses a problem. I only want to do the bitmap mode change on the background layer, and after I do the change I want to restore the layer structure as it was - with the foreground, lineart and over lineart layers back above the now-halftoned background. My current method of saving these layers and restoring them is clumsy. My action is able to automatically save the "foreground" layer by selecting it, cutting it, then pasting it back in after the mode changing is over. But, for the "ink" and "over ink" layers, I have to manually cut these layers, paste them into a new document, and later re-cut and re-paste after running my action. This is so clunky! What I would like to know is if it's possible to set aside my layers in an automated way, and then bring them back in, also in an automated way. An ugly (but functional) solution would be to replicate my actions of creating new documents and pasting them temporarily there, but I don't think Photoshop allows you to do things outside of your current document with an action. It seems to me that the only way to do what I want is to use the "hack" of incorporating the clipboard into the action as a clever hack, but that leaves me stuck as I have two more layers that can't fit onto that same clipboard. Help or suggestions would be appreciated. I can keep on doing it manually, but to have a comprehensive action would save me a ton of time.

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• What are the most important aspects to consider when choosing a SAN for a small office virtualizatio

  - by Prof. Moriarty

  I am in the process of consolidating 6 physical servers running 6 different operating system flavors (don't ask) into two identical physical servers (Dell PowerEdge 2900), using the free VMware ESXi 4.0 platform. We will install an iSCSI SAN over a 1GbE network, and store all virtual machine images on the SAN. Each physical server would run 3 VMs, and in the case of a physical server failure, we would manually switch over the other 3. These are all internal servers, while important, they can tolerate some amount of downtime (say <1h) to keep cost and complexity associated with HA down. I now need to choose the SAN to be used for the setup, on a low budget. We currently have about 2TB of data, but of course I want to able to grow, do backups of VM snapshots on other drives and remove them to a different location, etc. So what I would like to know is: Which are the must have features for this setup, without which using a SAN is not worth it? We are mostly a Dell shop, so I have been looking at the EqualLogic PS4000E High Availability model. Any opinions, anecdotes, bad experiences with this model? (This is one of the few models which could accomodate our existing disks from the physical servers.) If you can recommend something that is not Dell, but it has better value, I would most definitely consider it. Caveats, things to look out for?

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• LogMeIn style remote access to NAS drive

  - by Mere Development

  I've been asked to setup some remote access to a NAS drive. The NAS drive will sit on a VLAN inside a network that uses a Cisco 891 IS router as gateway. The charity have no SSL-VPN licenses for the Cisco. At present there are no open ports or services on the Cisco itself and ideally we would like to keep it that way for a while, hence the request for a LogMeIn style service that's initiated from inside. We need multiple user access, about 10 max. Using LogMeIn on a machine connected to the NAS would only provide screen sharing I believe, and no concurrent connections (could be wrong?) The end users need to be able to read and write files to the NAS from Mac's and PC's around the globe. Read-only access from Mobile devices would be a bonus but not absolutely necessary. This is for a charity, non-commercial, but they are willing to spend if necessary. Cisco config knowledge is at a minimum so if I can avoid upsetting that delicate device I'll be happy :) Anyone have any clever ideas? I can provide more information on request. Thanks, Ben

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• Enabling NAT forwarding using a second WAN interface and a second gateway on ubuntu

  - by nixnotwin

  I have 3 interfaces: eth0 192.168.0.50/24 eth1 10.0.0.200/24 eth2 225.228.123.211 The default gateway is 192.168.0.1 which I want to keep as it is in the changes I want to make. I want to masquerade eth1 10.0.0.200/24 and enable NAT forwarding to eth2. So I have done this: ip route add 225.228.123.208/29 dev eth2 src 225.228.123.211 table t1 ip route add default via 225.228.123.209 dev eth2 table t1 ip rule add from 225.228.123.211 table t1 ip rule add to 225.228.123.211 table t1 Now I can receive ping replies from any internet host if I did: ping -I eth2 8.8.8.8 To enable NAT forwarding I did this: sudo iptables -A FORWARD -o eth2 -i eth1 -s 10.0.0.0/24 -m conntrack --ctstate NEW -j ACCEPT sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT sudo iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE But it isn't working. To test I used a client pc and put it on 10.0.0.0/24 network and gateway was set as 10.0.0.200. I want to have 192.168.0.1 as default gateway. And the traffic that comes in via eth1 10.0.0.200/24 should be forwarded to eth2 225.228.123.211. I have enabled forwarding on ubuntua also.

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• CLI package to replace Plesk

  - by dotancohen

  Myself and another programmer are tasked with maintaining a few webservers. I prefer CLI tools, she prefers Plesk. However, I am adamant about not installing Plesk for quite a few reasons. I have written a small Python script for adding new domains, and now I am about to add the ability to configure email addresses while abstracting the details of Postfix from her. Before I go that route, I have googled to see if anything already exists, and am surprised that I have come up with nothing! Are there any mature, stable "control panels" or "server admin" tools like Plesk, but which are accessed via the CLI over SSH? I am looking for the following features: Add / remove / configure domains served by Apache. Add / remove / configure email boxes and mail groups. Add / remove MySQL databases, users, and configure users to databases. Provide basic monitoring of "server health", that is: memory usage, disk usage, CPU usage, bandwidth usage. Possibly set up STFP accounts so that only specific FTP users could access specific /var/www/someSite/ directories. Note that I was unsure if this question is OT for ServerFault. As per the ServerFault about page (There seems to be no more FAQ) this question meets two of the "ask about" criterion and zero of the "don't ask about" with the possible exception of being opinion-based. Therefore, to keep on-topic, I would like to know about the available applications but we should be subjective and less opinionated. Thank you!

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• APC fragmentation on EC2 Micro for Wordpress + W3TC

  - by Maarten Provo

  I'm trying to optimize APC for my Amazon EC2 Micro server running one Wordpress-site with W3TC. I've started with the settings advised by TechZilla in another topic but I keep getting high fragmentation with 50% of space being free. I've uploaded an image to http://www.maartenprovo.be/downloads/apc.jpg but I can't post it here since I need at least 10 reputation. What values can I optimize to prevent fragmentation? [apc] apc.enabled=1 apc.shm_segments=1 ;32M per WordPress install apc.shm_size=164M ;Leave at 2M or lower. WordPress does't have any file sizes close to 2M apc.max_file_size=2M ;Relative to the number of cached files apc.num_files_hint=1000 ;Relative to the size of WordPress apc.user_entries_hint=4096 ;The number of seconds a cache entry is allowed to idle in a slot before APC dumps the cache apc.ttl=7200 apc.user_ttl=7200 apc.gc_ttl=3600 ;Auto update chache files on change in WP-ADMIN or W3TC apc.stat=1 ;This MUST be 0, WP can have errors otherwise! apc.include_once_override=0 ;Only set to 1 while debugging apc.enable_cli=0 ;Allow 2 seconds after a file is created before it is cached to prevent users from seeing half-written/weird pages apc.file_update_protection=2 ;Ignore files apc.filters apc.slam_defense = 0 apc.write_lock = 1 apc.cache_by_default=1 apc.use_request_time=1 apc.mmap_file_mask=/var/tmp/apc.XXXXXX apc.stat_ctime=0 apc.canonicalize=1 apc.write_lock=1 apc.report_autofilter=0 apc.rfc1867=0 apc.rfc1867_prefix =upload_ apc.rfc1867_name=APC_UPLOAD_PROGRESS apc.rfc1867_freq=0 apc.rfc1867_ttl=3600 apc.lazy_classes=0 apc.lazy_functions=0

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• how many sites IIS 6 can handle

  - by Sarah Nasir

  Is there a limit for creating Sites in IIS. i have searched and some forums have it in discussion which says there is no limit. Someone mentioned that he has created upto 100,000 sites in IIS 6 but i dont know his server specs though. Personally i feel that whatever the limit of IIS, the resources will be run out well before the limit reaches. how do big sites like blogger and wordpress handle a huge number of sites on their server. Questions: 1) Is there an upper limit for IIS 6.0? if yes then what is it 2) What should be a good number of requests IIS should serve for a decent server? (I am not talking about dynamic requests on server or logs.) 3) Is there a way I can do the test run on my cloud to test the capability of my server. what factors should i keep in view. db request, page size, disk read/writes etc ? Response shall be highly appreciated.

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• how many sites IIS 6 can handle

  - by Sarah Nasir

  Is there a limit for creating Sites in IIS. i have searched and some forums have it in discussion which says there is no limit. Someone mentioned that he has created upto 100,000 sites in IIS 6 but i dont know his server specs though. Personally i feel that whatever the limit of IIS, the resources will be run out well before the limit reaches. how do big sites like blogger and wordpress handle a huge number of sites on their server. Questions: 1) Is there an upper limit for IIS 6.0? if yes then what is it 2) What should be a good number of requests IIS should serve for a decent server? (I am not talking about dynamic requests on server or logs.) 3) Is there a way I can do the test run on my cloud to test the capability of my server. what factors should i keep in view. db request, page size, disk read/writes etc ? Response shall be highly appreciated.

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• Connecting remotely to an SQL server inside a LAN

  - by vondip

  Hello everyone, I am using SQL server 2008 inside my home lan. I've configured it to accept remote connections and I can now connect to the server from other pcs inside the lan. The problems rises when I try connecting to the server from a computer outside of my home lan. I've disabled my router's firewall and I've configured a virtual server on port 1433 forwarding to the correct lan ip. What's wrong? why is it not working? Thank you very much for your help~! Edit: This is the error I keep getting: A network related or instance specific error occured while establishing connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that the SQL SERVER is configued to allow remote connections. (provider : Sql network interfaces, error: 25- Connection string is not valid) OK these are my router's details: edimax br-6204wg I am not sure how I am supposed to browse google.com. can you be a bit more specific?

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• Unable to force Debian to do unattended install... libc6 wants interactive confirm

  - by JD Long

  I'm trying to create a script that forces a Debian Lenny install to install the latest version of CRAN R. During the install it appears libc6 is upgraded and the install wants interactive confirm that it's OK to restart three services (mysql, exim4, cron). This process HAS to be unattended as it runs on Amazon's Elastic Map Reduce (EMR) machines. But I'm running out of options. Here's a few things I've tried: This previous question appears to be exactly what I'm looking for. So I set up my install script as follows: # set my CRAN repos... yes, I know there's a new convention where to put these. echo "deb http://cran.r-project.org/bin/linux/debian lenny-cran/" | sudo tee -a /etc/apt/sources.list echo "deb-src http://cran.r-project.org/bin/linux/debian lenny-cran/" | sudo tee -a /etc/apt/sources.list # set the dpkg.cfg options per the previous SuperUser question echo "force-confold" | sudo tee -a /etc/dpkg/dpkg.cfg echo "force-confdef" | sudo tee -a /etc/dpkg/dpkg.cfg export DEBIAN_FRONTEND=noninteractive # add key to keyring so it doesn't complain gpg --keyserver pgp.mit.edu --recv-key 381BA480 gpg -a --export 381BA480 > jranke_cran.asc sudo apt-key add jranke_cran.asc sudo apt-get update # install the latest R sudo apt-get install --yes --force-yes r-base But this script hangs with the following request for input: OK, so I tried stopping the services using the following script: sudo /etc/init.d/mysql stop sudo /etc/init.d/exim4 stop sudo /etc/init.d/cron stop sudo apt-get install --yes --force-yes libc6 This does not work and the interactive screen comes back, but this time with only cron listed as the service that must be restarted. So is there a way to make libc6 just restart these services with no user input? Or is there a way to stop cron so it does not cause an interactive prompt? Maybe a creative option I've never thought of? Keep in mind that this system is brought up, some Hadoop code is run, and then it's torn down. So I can put up with side effects and bad behavior that we might not want in a production desktop machine or web server.

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• Apache 2: Mod_Rewrite Help - If/else for directory exists

  - by BHare

  This is my current and sloppy Apache 2 mod_rewrite. Keep in mine the part with site1 site2..etc has about 50 sites. RewriteEngine on RewriteCond %{HTTP_HOST} ^([^.]+)\.mainsite\.org$ RewriteCond /home/%1/ -d RewriteRule ^(.+) %{HTTP_HOST}$1 RewriteRule ^([^.]+)\.mainsite\.org/media/(.*) /home/$1/special/media/$2 RewriteRule ^([^.]+)\.mainsite\.org/(.*) /home/$1/www/$2 RewriteCond %{HTTP_HOST} ^mainsite\.org$ [NC] RewriteRule ^(.*)$ http://www.mainsite.org$1 [R=302] RewriteCond %{HTTP_HOST} (site1|site2|site3|site4)\.(com|net|biz|org|us)$ [NC] RewriteCond %{REQUEST_URI} !^/media/ RewriteRule ^/(.*)$ /home/%1/www/$1 RewriteCond %{HTTP_HOST} (site1|site2|site3|site4)\.(com|biz|net|org|us)$ [NC] RewriteRule ^/media/(.*)$ /home/%1/special/media/$1 RewriteCond %{REQUEST_URI} favicon.ico$ RewriteRule ^(.*)$ /misc/favicon.ico So if someone tries to go to theirusername.mainsite.org it will check if /home/theirusername/ exists, and if it does use their www (/home/theirusername/www/) as the file location for web files. If they try they try to access theirusername.mainsite.org/media/ it will make a special file location to look for the file(s) at /home/theirusername/special/media/ I would like it if the username did NOT have /home/username that it would automatically default to www.mainsite.org. I am having a hard time understanding how to do skips and such. so: If someone went to notrealusername.mainsite.org/forum/ it would auto direct to www.mainsite.org/forum/ Extra: I am using repetitive code for other site for example lets say foobar has a website foobar.com, it goes through the same process as mainsite.org so figured maybe having something like: RewriteCond %{HTTP_HOST} ^([^.]+).(mainsite.org|com|net|biz|org)$ where I could have one major rule for all existing domains who have a /home/

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• arrays in puppet

  - by paweloque

  I'm wondering how to solve the following puppet problem: I want to create several files based on an array of strings. The complication is that I want to create multiple directories with the files: dir1/ fileA fileB dir2/ fileA fileB fileC The problem is that the file resource titles must be unique. So if I keep the file names in an array, I need to iterate over the array in a custom way to be able to postfix the file names with the directory name: $file_names = ['fileA', 'fileB'] $file_names_2 = [$file_names, 'fileC'] file {'dir1': ensure => directory } file {'dir2': ensure => directory } file { $file_names: path = 'dir1', ensure =>present, } file { $file_names_2: path = 'dir2', ensure =>present, } This wont work because the file resource titles clash. So I need to append e.g. the dir name to the file title, however, this will cause the array of files to be concatenated and not treated as multiple files... arghh.. file { "${file_names}-dir1": path = 'dir1', ensure =>present, } file { "${file_names_2}-dir2": path = 'dir1', ensure =>present, } How to solve this problem without the necessity of repeating the file resource itself. Thanks

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• A-2-Z web hosting on Amazon AWS

  - by JDelage

  All, I am studying web dvp, and one of my classes is project-based. We have to build a functional site that demonstrate our understanding of: HTML, CSS, Javascript, php, MySQL, And potentially Ajax or some other web component. For the project, we can use a local server using WampServer and basically build the site entirely on our laptop. If I have time, I would like to create a real site, and I thought it would be a good way to familiarize myself with Amazon's AWS services. So if I purchase a domain name, can I rely on AWS to host the site from A-to-Z? I understand I can use AWS to host content, the database, and do the background computations, if needed. What else do I need and what are the parts that AWS cannot help me with? Second, is there good documentation for a beginner to navigate AWS and learn how to use it (either on Amazon, or some 3rd party sites, or even a good book, as long as is up to date). The ideal documentation would be a tutorial on creating a web site from a-to-z on AWS, as detailed as possible. As you can guess, I have limited understanding of the IT issues. I have 0 Linux or sysadmin experience, but this is a good opportunity to change that. I hope you can help me. Thank you, JDelage PS: Please keep the answers AWS-specific. At this point, I am only interested in alternative services to the extent that they plug a hole in Amazon's offering.

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• Solid State Drive Occasionally Freezes For A Minute While OS Is "Beach Balling"

  - by Boris_yo

  Almost a month ago I bought Intel 330 128GB solid state drive, migrated my data with Intel branded limited-feature Acronis from old HDD to new SSD, optimized with Intel Toolbox and started using it. Occassionally I get close to 1 minute freezes while seeing operating system "beach balls" and animations still work, I can interact and click on something but nothing responds, nothing loads. Recently a couple of such freezes occurred in shorter amount of time in a row. I have noticed that if I stop interacting with laptop, the freeze lasts less time than if I was interacting with laptop. But the bigger problem is when freeze just does not end and computer keeps being stuck unlil it is more than half hour and I run out of patience to keep waiting and feeling I need to restart the system because I am not getting anywhere. Such freeze happened while laptop was cold booting into Windows 7. This is when freeze hang occurred and I had to restart, only later to be greeted with Windows recovery screen stating something about faiure of boot sector and asking to insert Windows repair CD. But after I restarted, Windows booted successfully and all was well. I have filmed video of freeze hang occurring in cold boot which you can see here (on video page look below for description): http://www.youtube.com/watch?v=8b7MQlcDTUs As I have mentioned in the beginning, the SSD is less than a month old but here is S.M.A.R.T statistics just in case (TRIM is enabled btw according to CrystalDiskInfo): I want to emphasize that this SSD is the only drive I have, yet it is working in RAID mode (it was enabled initially in BIOS by previous laptop's owner) on Intel Rapid Storage drivers. I am contemplating about switching to AHCI mode but want to be sure this won't cause data loss. Additionally, the stock firmware is the only firmware available currently, yet Intel does not respond to my posts in their community board. If anyone here has this SSD model or generally has experience with SSD drives, I would love to know your thoughts.

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• How to install Predis

  - by user782860

  I am trying to install Predis, but keep getting a 500 Server errror. Here is what I have done. 1.) Have apache and php installed on Ubuntu Natty. 2.) Used the instructions on this page http://redis.io/download to download Redis. 3.) Ran the following example to confirm that Redis is working: $ src/redis-cli redis> set foo bar OK redis> get foo "bar" 4.) Have a local website at /home/user/Dropbox/documents/www/mywebsite.com/index.php and have confirmed that php is working. 5.) Downloaded the .zip version of Predis ( https://github.com/nrk/predis Version: v0.6.6-PHP5.2 ), and unzipped the contents to /home/user/Dropbox/documents/www/mywebsite.com/. So now Predis is here: /home/user/Dropbox/documents/www/mywebsite.com/nrk-predis-3bf1230/ 6.) Opened the /home/user/Dropbox/documents/www/mywebsite.com/index.php page. Here is its contents: <? define("PREDIS_BASE_PATH", "nrk-predis-3bf1230/lib/"); spl_autoload_register(function($class) { $file = PREDIS_BASE_PATH.strtr($class, '\\', '/').'.php'; if (file_exists($file)) { require $file; return true; } }); $redis = new Predis_Client(); $redis->set('foo', 'bar'); $value = $redis->get('foo'); ?> I have tried changing: $redis = new Predis_Client(); to: $redis = new Predis\Client(); Have tried changing the the PREDIS_BASE_PATH to: /nrk-predis-3bf1230/lib /home/user/Dropbox/documents/www/mywebsite.com/nrk-predis-3bf1230/lib/ /home/user/Dropbox/documents/www/mywebsite.com/nrk-predis-3bf1230/lib Have done a chmod +x on both: /home/user/Dropbox/documents/www/mywebsite.com/nrk-predis-3bf1230/ /home/user/Dropbox/documents/www/mywebsite.com And doing all of the above always results in a 500 server error. What am I doing wrong?

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• IP Blacklists and suspicious inbound and outbound traffic

  - by Pantelis Sopasakis

  I administer a web server and recently we had our IP banned (!) from our host after they received a notification e-mail for abuse. In particular our server is allegedly involved in spam attacks over HTTP. The content of the abuse report email we received was not much informative - for example the IP addresses our server is supposed to have attacked against are not included - so I started a wireshark session checking for suspicious traffic over TCP/HTTP while trying to locate possible security holes on the system. (Let me note that the machine runs a Debian OS). Here is an example of such a request... Source: 89.74.188.233 Destination: 12.34.56.78 // my ip Protocol: HTTP Info: GET 'http://www.media.apniworld.com/image.php?type=hv' HTTP/1.0 I manually blacklisted this host (as well as some other ones) blocking them with iptables, but I can't keep on doing manually all day long... I'm looking for an automated way to block such IPs based on: Statistical analysis, pattern recognition or other AI-based analysis (Though, I'm reluctant to trust such a solution, if exists) Public blacklists Using DNSBL I actually found out that 89.74.188.233 is blacklisted. However other IPs which are strongly suspicious like 93.199.112.126 (i.e. http://www.pornstarnetwork.com/account/signin), unfortunately were not blacklisted! What I would like to do is to automatically connect my firewall with DNSBL (or some other blacklist database) and block all traffic towards blacklisted IPs or somehow have my local blacklist automatically updated.

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• Prevent nginx from redirecting traffic from https to http when used as a reverse proxy

  - by Chris Pratt

  Here's my abbreviated nginx vhost conf: upstream gunicorn { server 127.0.0.1:8080 fail_timeout=0; } server { listen 80; listen 443 ssl; server_name domain.com ~^.+\.domain\.com$; location / { try_files $uri @proxy; } location @proxy { proxy_pass_header Server; proxy_redirect off; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto https; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Scheme $scheme; proxy_connect_timeout 10; proxy_read_timeout 120; proxy_pass http://gunicorn; } } The same server needs to serve both HTTP and HTTPS, however, when the upstream issues a redirect (for instance, after a form is processed), all HTTPS requests are redirected to HTTP. The only thing I have found that will correct this issue is changing proxy_redirect to the following: proxy_redirect http:// https://; That works wonderfully for requests coming from HTTPS, but if a redirect is issued over HTTP it also redirects that to HTTPS, which is a problem. Out of desperation, I tried: if ($scheme = 'https') { proxy_redirect http:// https://; } But nginx complains that proxy_redirect isn't allowed here. The only other option I can think of is to define the two servers separately and set proxy_redirect only on the SSL one, but then I would have duplicate the rest of the conf (there's a lot in the server directive that I omitted for simplicity sake). I know I could also use an include directive to factor out the redundancy, but I really want to keep just one conf file without any dependencies. So, first, is there something I'm missing that will negate the problem entirely? Or, second, if not, is there any other way (besides including an external file) to factor out the redundant config information so that I can separate out the HTTP and HTTPS versions of the server config?

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• Barriers to IPv6 deployment: addressing

  - by sysadmin1138

  There are several things that are keeping IPv6 deployment from being a topic of active discussion here at my work. There are the usual technical issues, but one non-technical one appears to be a major stumbling block on the path to actually getting a deployment project going. Addresses, memorizing of. Specifically, IPv4 addresses are comprehensible, and IPv6 addresses just look like a big long string of hex. The human mind has real trouble memorizing lists of more than 7-8 items, and an IPv4 address (192.168.231.148) has four items in it which makes it easy for us to memorize. A fully populated IPv6 address has not only 8 sections, but each section has 4 hex digits in it. IPv6 addresses were not designed for memorization. To the technician who knows that the DNS server is at 192.168.42.42 (or more likely "42.42", since the company prefix is likely memorized), the idea of memorizing an IPv6 address fills them with dread. Which in turn makes them much less enthusiastic about participating in an IPv6 deployment project. Because of how our network works we're not fully dynamic in terms of v4 addressing. We have several to many subnets that are entirely statically assigned for a variety of reasons, chief among them being that the overhead of static DHCP assignments is perceived as being too great. Also, some devices still aren't smart enough to pull DNS addresses out of DHCP while also having a static assignment, and therefore require manually configured DNS settings. Therefore, some v6 address memorization will have to be done. We're not under any mandate to get v6 out the door, so we don't have pressure from the top. However, it is time to start prepping our infrastructure to handle IPv6 even if we don't convert wholesale. For those of you who have been in IPv6-land for a while, what short-cut methods do you use to discuss or keep track of subnets and specific/critical IP addresses? If I can help reduce some of the dread surrounding IPv6 we might get the project going.

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• Thunderbird does not delete messages from the POP server

  - by Max888

  Thunderbird does not delete messages from the POP server. I am a Yahoo Plus user and I can download messages from the inbox in Thunderbird from the Yahoo POP3 server. However, I want to delete read messages directly on the email client rather than go to Yahoo mail. When I do this, emails are still on the server In accounts setting, I have the following options ticked: -Automatically download new messages -Leave messages on server, Until I delete them Thanks for any guidance Update: Thanks for the replies so far. Some clarification: I do want to keep some messages on Yahoo for filling them in my online folders, hence the reason I do not download ALL my messages to Tbird and delete server message automatically **Update 2: Cracked it!! OK, boys and girls, here is the way to do it. Go to Options- Advanced - Config Editor find the Name 'mail . pop3 . deleteFromServerOnMove' Set it to True True: Delete the copy of the message on the POP3 server if you move or delete the message. False(default): Only delete the copy of the message on the POP3 server if you delete the message. That's it, restart Thunderbird. You need to press 'Get Mail' everytime you want to sync with the email server, in order for you to make sure messages in the application is in sync with the email server.**

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• NAS is intermittently inaccessible

  - by Natalie

  Model: QNAP TS-410 Turbo NAS Firmware version: 3.2.5 Build 0409T Issue: Each day, users connect to share folders on the NAS system and have read/write permissions for the share folders to which they need access. However, it often asks them for their log-in details and - when provided with right (or wrong) credentials for a user with read/write permissions - it denies them access. I've checked the logs and I keep seeing the following warnings: 2011-11-23 16:26:29 System 127.0.0.1 localhost Re-launch process [rpc.mountd]. 2011-11-23 16:26:16 System 127.0.0.1 localhost Re-launch process [proftpd]. 2011-11-23 16:25:30 System 127.0.0.1 localhost Re-launch process [rpc.mountd]. 2011-11-23 16:25:15 System 127.0.0.1 localhost Re-launch process [proftpd]. 2011-11-23 16:24:33 System 127.0.0.1 localhost Re-launch process [rpc.mountd]. 2011-11-23 16:24:21 System 127.0.0.1 localhost Re-launch process [proftpd]. 2011-11-23 16:23:37 System 127.0.0.1 localhost Re-launch process [rpc.mountd]. 2011-11-23 16:23:25 System 127.0.0.1 localhost Re-launch process [proftpd]. They seem to occur per minute but I am uncertain about whether or not they are relevant to this issue. The "Login failed" warning has also displayed in the system connection logs which tells me when and which user was unable to log in, as shown below: 2011-11-22 16:11:07 Administrator 192.168.0.xx computer-01 SAMBA --- Login Fail 2011-11-22 16:11:07 Administrator 192.168.0.xx computer-01 SAMBA --- Login Fail 2011-11-22 16:11:06 Administrator 192.168.0.xx computer-01 SAMBA --- Login Fail 2011-11-22 13:46:14 administrator 192.168.0.yy --- HTTP Administration Login Fail 2011-11-22 13:46:09 administrator 192.168.0.yy --- HTTP Administration Login Fail 2011-11-21 15:17:22 user 192.168.0.zz computer-02 SAMBA --- Login Fail 2011-11-21 15:17:18 user 192.168.0.zz computer-02 SAMBA --- Login Fail 2011-11-21 15:17:17 user 192.168.0.zz computer-02 SAMBA --- Login Fail I've researched this on Google and the QNAP forums and have not come up with a resolution as yet.

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• Postfix: How do I Make Email Aliases Work?

  - by Nick

  The documentation claims that I can add aliases in a file (like /etc/postfix/virtusertable) and then use the "virtual_maps" directive to point to it. This does not appear to be working, however. My mail is bouncing with: Recipient address rejected: User unknown in local recipient table; If I mail the user from the server using the mail command, it works. mail myuser The message goes through postfix and inserts itself in the Cyrus inbox correctly. When I use fetchmail to get the user's messages off a pop3 server, postfix fails. The user's email is "[email protected]", but it doesn't seem to be mapping correctly to "myuser", the cyrus mailbox name. /etc/postfix/main.cf myhostname = localhost alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all mailbox_transport = lmtp:unix:/var/run/cyrus/socket/lmtp #lmtp:unix:/var/run/lmtp virtual_alias_domains = mydomain.com virtual_maps = hash:/etc/postfix/virtusertable /etc/fetchmailrc et syslog; set daemon 20; poll "mail.pop3server.com" with protocol pop3 user "[email protected]" password "12345" is "myuser" fetchall keep /etc/postfix/virtusertable [email protected] myuser postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all mailbox_size_limit = 0 mailbox_transport = lmtp:unix:/var/run/cyrus/socket/lmtp mydestination = localhost myhostname = localhost mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_alias_domains = mydomain.com Why is it ignoring my alias?

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