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• Disable CTRL+mouse wheel zooming in Chrome?

  - by Peter Nore

  I'm a normal-sighted person and I would like to view pages at 100% all the time. I use keyboard shortcuts that involve CTRL a lot, so about twenty times a day I accidentally hit CTRL at the same time that I'm scrolling, which results in the page being reflowed and repainted. This in is annoying because it can take up to 30 seconds to fix the issue, depending on how complex the site layout is. On sites with dynamic layout such as Google Docs the problem is more serious; accidentally hitting CTRL+mouse wheel corrupts the display and forces me to refresh the page entirely, sometimes causing me to loose information in the process. I would like to either decouple CTRL+mouse wheel from zoom, or disable zoom functionality altogether. This is possible on Firefox by using about:config; is there a similar way to edit detailed settings in Chrome? Would I have access to the detailed settings if I used Chromium instead of Chrome? I'll probably jump ship back to Firefox if I can't solve this problem. There is a superuser question that asks basically the same thing I'm asking, but for Firefox and Internet Explorer exclusively. Other people on the Chrome forum have had related issues, but none have the same problem. "I would really like it if I could deactivate the auto zoom in/out." had "something with laptops and Windows 7", not the feature built into Chrome. Other people have had PDF specific issues, which doesn't concern me. I've also tried searching for extensions that allow you to disable the scroll; I had hoped that "Zoom Lock" would have the ability to lock the zoom at 100% and prevent CTRL+scroll wheel from distorting the display, but it doesn't work for my use case. Google Chrome version 9.0.597.84 (Official Build 72991) Operating System: Ubuntu 10.10

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• How do I add a WMware ESXi Host to Microsoft Virtual Machine Manager?

  - by user63250

  I am trying to manage virtual machines running on a VMware ESXi host using Microsoft System Center Virtual Machine Manager. I was able to add the ESXi machine using the "Add VMware VirtualCenter server" option, but can't access any of the VMs on the datastore associated with this ESXi server. The datastore of the ESXi box is showing up with the correct name, but it won't let me see any of the VMs that have already been created; I get "There are no virtual machines on this host." Because I couldn't get any of the existing virtual machines to show up, I tried creating some new ones. When using VMM to connect to ESXi and create new VMs, I get the following error messages in the "rating explanation" section: The virtualization software on the selected host does not support virtual hard disks on an IDE bus. and The virtualization software on the host XXXXXX does not support the creation of dynamic virtual hard disk. Any ideas on why I can't manage existing machines and why I can't create new ones? The existing machines were created in vSphere. I should note that the ESXi server and the server running SCVMM are both on the same domain. I should also note that although the ESXi box has been added as a VirtualCetner server, when I try to add it through the "Add Host" option, I get an error message saying "Virtual Machine Manager cannot complete the VirtualCenter action on server EXSi because of the following error: The operation is not supported on the object."

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• iMac 20inch (Mid 2007) SL DVD Boot Prohibitory Sign

  - by Caitlann Lloyd

  iMac 20inch (Mid 2007 Build) with Ubuntu 12.0.4 How I got in this situation I had a perfectly healthy Intel iMac running Snow Leopard several months ago. Then I got the dreaded spinning gear and several kernel panics. After getting a little frustrated (failing to find a solution online), I found an old macbook installation disk and used it to access Disk Utility. From here, I erased my entire hard drive leaving me with no OS. I then created a Ubuntu DVD and installed Ubuntu onto the system. Now, on Ubuntu, I wine installed Transmac and burned a Single layer copy (with languages, etc. removed to save space) of Snow Leopard onto a 4.7GB DVD. I tried to boot from it and was met with first the grey apple screen and a spinning cog before the grey apple shortly turned into the infamous prohibitory sign. Note: I met this problem previously when using Disk Utility to create a bootable USB of Snow Leopard, hence I severely doubt it has anything to do with the DVD created. Resources at my disposal 1 x iMac running Ubuntu 6 x 4.7GB DVDs 1 x USB Stick 12GB 1 x Windows 7 Laptop Resources I do not have Firewire cables Access to a prebuilt retail disk (Misplaced) Access to another Mac Apple Warranty I would be hugely grateful if someone was able to tell me how to install Snow Leopard again.

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• What's the piece of hardware listening on Facebook's or Wikipedia's IP address?

  - by Igor Ostrovsky

  I am trying to understand how massive sites like Facebook or Wikipedia work, for my intellectual curiosity. I read about various techniques for building scalable sites, but I am still puzzled about one particular detail. The part that confuses me is that ultimately, the DNS will map the entire domain to a single IP address, or a handful of IP addresses in the case of round-robin DNS. For example, wikipedia.org has only one type-A DNS record. So, people from all over the world visiting Wikipedia have to send a request to the one IP address specified in DNS. What is the piece of hardware that listens on the IP address for a massive site, and how can it possibly handle all the load coming from the requests for users all over the world? Edit 1: Thanks for all the responses! Anycast seems like a feasible answer... Does anyone know of a way to check whether a particular IP address is anycast-routed, so that I could verify that this really is the trick used in practice by large sites? Edit 2: After more reading on the topic, it appears that anycast is not typically used for dynamic web content. Anycast is usually used for UDP (e.g., DNS lookups), or sometimes for static content. One interesting thing to note is that Facebook uses profile.ak.fbcdn.net to host static content like style sheets and javascript libraries. Each time I ping this name, I get a response from a different IP address. However, I can't tell whether this is anycast in action, or a completely different technique. Back to my original question: as far as I can tell, even a large site will have a single expensive piece of load-balancing hardware listening on its handful of public IP addresses.

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• Require and Includes not Functioning Nginx Fpm/FastCGI

  - by Vince Kronlein

  I've split up my FPM pools so that php will run under each individual user and set the routing correctly in my vhost.conf files to pass the proper port number. But I must have something incorrect in my environment because on this new domain I set up, require, require_once, include, include_once do not function, or rather, they may not be getting passed up to the interpreter to be rendered as php. Since I already have a Wordpress install on this server that runs perfectly, I'm pretty sure the error is in my server block for nginx. server { server_name www.domain.com; rewrite ^(.*) http://domain.com$1 permanent; } server { listen 80; server_name domain.com; client_max_body_size 500M; index index.php index.html index.htm; root /home/username/public_html; location / { try_files $uri $uri/ index.php; } location ~ \.php$ { if (!-e $request_filename) { rewrite ^(.*)$ /index.php?name=$1 break; } fastcgi_pass 127.0.0.1:9002; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } location ~ /\.ht { deny all; } } The problem I'm finding I think is that there are dynamic calls to the doc root index file, while all calls to anything within a sub-folder should be routed as normal ie: NOT passed to index.php. I can't seem to find the right mix here. It should run like so: domain.com/cindy (file doesn't exist) --> index.php?name=$1 domain.com/admin/anyfile.php (files DO exist) --> admin/anyfile.php?$args

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• Website hosting from home - IIS6

  - by Paul

  I'm wanting to host a few websites from home, primarily because I'm using some BETA Microsoft software (.NET 4 and EF) and don't want to install it on my production server which is hosted at eukhost.com. Basically, I'm completely new to this sort of thing. So far, here is what I've done: Registered the domain name at namecheap.com (let's call it mydomain.com) Gone to "Nameserver Registration" in the panel and entered my IP address for the NS1 and NS2 records (let's say the IP is 0.0.0.0). Gone to "Domain Name Server Setup" and entered ns1.mydomain.com & ns2.mydomain.com Forwarded requests from port 80 to my internal IP (let's say 192.168.1.254) Created the website in IIS (I'm just testing with a single website so far, so have not created any host header values) Now, if I type in the IP address (http://0.0.0.0) I get the site as expected. However, if I enter http://www.mydomain.com I get an error saying "DNS Error - Cannot find server". I'm aware that there is a service from DynDNS that will automatically change the IP if I have a dynamic address, however my IP has remained static since I installed the ISP (since October) so I don't need this. Is there any way that I can get the DNS to work just by configuring IIS or something in Windows? I don't really want to have to pay for any 3rd party service. Thanks,

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• Varnish, Nginx, Apache, APC, Meteor, Cpanel & Wordpress On A Single Server, Any Good?

  - by Aahan

  Yes, I have read many close questions, but I needed a specific answer and hence this question. First, these are my new server specifications: Linux Server (CentOS), Intel Xeon 3470 Quad Core (2.93GHz x 4) processor, 4 GB DDR3 Memory, 1TB Hard Disk Space, 10 TB Bandwidth and 9 Dedicated IPs. AIM: To speed up my wordpress blog + Increase server's capacity to handle heavy load PLAN: This is how I am planning to setup my server - - VARNISH (in the front, to cache server responses) NGINX (to effectively handle static content & overcome the C10k problem) APACHE (behind Nginx, to effectively deliver dynamic content) APC (PHP page, database & object caching) CPANEL (which requires Apache, and I require it) WORDPRESS W3 TOTAL CACHE (caching plugin for Wordpress). So , will the setup work? Have anyone tried it? Please shower your thoughts and knowledge. NOTE: I can't do without Apache because I am used to that .htaccess & Cpanel stuff. So, it's not any option. All others are options. Please try to help. I hope I am clear in what I wanted to ask.

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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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• How do you use VIM to edit tabular data (tables)? Specifically, BIND (named) DNS db files.

  - by Richard Bronosky

  I'm usually a purist when it comes to vimming. I don't like remapping keys, or learning to rely on a bunch of plugins. I like to feel just as powerful on foreign boxen as I do on my own dev box. I do, however, believe in syntax files. Even though the solution may not be a syntax file (bindzone.vim is what I use), I want it bad enough to do whatever. I regularly view or edit tab (or comma, but that would be a bonus) delimited data. I hate having to set my tabstop to some ridiculous number in order to have everything line up. Example: The BIND zone files are ~40+,6,2,5,15+. So, even though I could view them on a single screen, if I set ts=40, I cannot. I have been searching for a "dynamic tab size" solution for years, but no luck. I hate that my only good way of editing or even visualizing tabular data is to scp it to my work station and open it in Open Office. There has to be a better way.

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• How should I configure nginx caching headers for a "baked" static file blog? (Octopress)

  - by Doug Stephen

  I recently deployed an Octopress blog (which is a blogging platform built around Jekyll). It's a static-site blog generator, with no dynamic content or databases to muck about with. It's being served up by nginx. My question is, what is the appropriate expires directive or Cache-Control header that I should set to make sure that visitors get the most up-to-date version of the site when they visit without having to manually refresh? Since the site is just .html files it seems to get cached pretty aggressively. I've tried a million different combinations of expires modified + xxxx and even straight up expires off but I can't seem to wrap my head around it. I'm very new to dealing with caching like this, specifically, on static files that change frequently, and obviously if the site hasn't been changed then I'd like for it to be served up out of the cache. Update (still not solved though): I found open_file_cache, tweaked that. Still no dice. It seems like what I might want to do is use nginx as a proxy cache and use Apache with ETags? Is there really no convenient way to make nginx play nicer with conditional requests from the client? TL;DR: I'm running a static-file blog and I'd like to set up nginx to only serve from the cache if the blog hasn't been updated recently, but I'm too stupid to figure it out myself because I'm relatively new to web servers.

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• What is the optimum way to secure a company wide wiki?

  - by Mark Robinson

  We have a wiki which is used by over half our company. Generally it has been very positively received. However, there is a concern over security - not letting confidential information fall into the wrong hands (i.e. competitors). The default answer is to create a complicated security matrix defining who can read what document (wiki page) based on who created it. Personally I think this mainly solves the wrong problem because it creates barriers within the company instead of a barrier to the external world. But some are concerned that people at a customer site might share information with a customer which then goes to the competitor. The administration of such a matrix is a nightmare because (1) the matrix is based on department and not projects (this is a matrix organisation), and (2) because in a wiki all pages are by definition dynamic so what is confidential today might not be confidential tomorrow (but the history is always readable!). Apart from the security matrix, we've considered restricting content on the wiki to non super secret stuff, but off course that needs to be monitored. Another solution (the current) is to monitor views and report anything suspicious (e.g. one person at a customer site having 2000 views in two days was reported). Again - this is not ideal because this does not directly imply a wrong motive. Does anyone have a better solution? How can a company wide wiki be made secure and yet keep its low threshold USP? BTW we use MediaWiki with Lockdown to exclude some administrative staff.

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• Debian x86_64 + Nginx + PHP5-FPM optimization

  - by Olal'a

  I used to have a VPS (512MB) from Linode and I was running nginx + php5-fpm (which comes with php5.3.3) on Debian Lenny (i686). The total memory usage was about 90-100MB. Now I have another VPS (different hosting company) and I also run nginx + php5-fpm on Debian Lenny (x86_64). The system is 64-bit, so the memory usage is higher now, about 210-230MB, which I think is too much. Here is my php5-fpm.conf: pm = dynamic pm.max_children = 5 pm.start_servers = 2 pm.min_spare_servers = 2 pm.max_spare_servers = 5 pm.max_requests = 300 That's what top command tells me: top - 15:36:58 up 3 days, 16:05, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 209 total, 1 running, 208 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 99.9%id, 0.1%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 532288k total, 469628k used, 62660k free, 28760k buffers Swap: 1048568k total, 408k used, 1048160k free, 210060k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 22806 www-data 20 0 178m 67m 31m S 1 13.1 0:05.02 php5-fpm 8980 mysql 20 0 241m 55m 7384 S 0 10.6 2:42.42 mysqld 22807 www-data 20 0 162m 43m 22m S 0 8.3 0:04.84 php5-fpm 22808 www-data 20 0 160m 41m 23m S 0 8.0 0:04.68 php5-fpm 25102 www-data 20 0 151m 30m 21m S 0 5.9 0:00.80 php5-fpm 10849 root 20 0 44100 8352 1808 S 0 1.6 0:03.16 munin-node 22805 root 20 0 145m 4712 1472 S 0 0.9 0:00.16 php5-fpm 21859 root 20 0 66168 3248 2540 S 1 0.6 0:00.02 sshd 21863 root 20 0 66028 3188 2548 S 0 0.6 0:00.06 sshd 3956 www-data 20 0 31756 3052 928 S 0 0.6 0:06.42 nginx 3954 www-data 20 0 31712 3036 928 S 0 0.6 0:06.74 nginx 3951 www-data 20 0 31712 3008 928 S 0 0.6 0:06.42 nginx 3957 www-data 20 0 31688 2992 928 S 0 0.6 0:06.56 nginx 3950 www-data 20 0 31676 2980 928 S 0 0.6 0:06.72 nginx 3955 www-data 20 0 31552 2896 928 S 0 0.5 0:06.56 nginx 3953 www-data 20 0 31552 2888 928 S 0 0.5 0:06.42 nginx 3952 www-data 20 0 31544 2880 928 S 0 0.5 0:06.60 nginx So, the question is there any way to use less memory? Btw, I have 16 cores and it would be nice to make use of them...

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• heavy load on mysql

  - by payal

  i have dedicated server with very good configuation like 16 gb ram etc but i am facing heavy load from mysql i am running a music wesbite however only one database is running and 5-10 pages are only running.when i click on whm show processlist it shows only 2-3 processes However whm load is always less than one but when i click on whm load it shows 20% of cpu usage by mysql and after some time it starts saying can not connect to mysql . mysql server has gone away 1691 (Trace) (Kill) mysql 0 19.2 2.7 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --log- error=/var/lib/mysql/server.xyz.com.err --pid-file=/var/lib/mysql/server.xyz.com.pid i have tested static pages they are coming blezing fast but all dynamic pages which are using mysql is coming damn slow it takes years to open.. my.conf file is [mysqld] key_buffer = 1536M max_allowed_packet = 1M max_connections = 250 max_user_connections = 15 wait_timeout=40 connect_timeout=10 table_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 32M server-id = 14 old-passwords = 1 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash [myisamchk] key_buffer = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout ihave checked log error file it says nothing.i have increased maximum connnection also to 1000 but still same problem is there .if i disconnect that one databasejust by changing the name of database i can see withing half hour the load of server and mysql goes down to negliglble .i have tested everything and if there are some query which can cause heavy load to server can you please list which type of query can cause heavy load on server then also for 5-10 pages it will never cause that much heavy load. i have seen server with 500 websites but was working just fine.

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• heavy load on mysql

  - by payal

  i have dedicated server with very good configuation like 16 gb ram etc but i am facing heavy load from mysql however only one database is running and 5-10 pages are only running. However whm load is always less than one but when i click on whm load it shows 20% of cpu usage by mysql and after some time it starts saying can not connect to mysql . mysql server has gone away 1691 (Trace) (Kill) mysql 0 19.2 2.7 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --log- error=/var/lib/mysql/server.xyz.com.err --pid-file=/var/lib/mysql/server.xyz.com.pid i have tested static pages they are coming blezing fast but all dynamic pages which are using mysql is coming damn slow it takes years to open.. ihave checked log error file it says nothing.i have increased maximum connnection also to 1000 but still same problem is there .if i disconnect that one databasejust by changing the name of database i can see withing half hour the load of server and mysql goes down to negliglble .i have tested everything and if there are some query which can cause heavy load to server can you please list which type of query can cause heavy load on server then also for 5-10 pages it will never cause that much heavy load. i have seen server with 500 websites but was working just fine.

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• Nginx + PHP-FPM Too Many Resources

  - by user3393046

  My Server has the following Specs CPU: 6 Cores Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz RAM: 32 GB I have a problem with nginx+php-fpm. They are taking too many resources for an unknown reason. Even if i restart the nginx + php-fpm the start up processes will use many resources. My nginx Config is the following: user nginx; worker_processes auto; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; worker_rlimit_nofile 300000; events { worker_connections 6000; use epoll; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; keepalive_timeout 65; #gzip on; include /etc/nginx/conf.d/*.conf; } My php-fpm pool config is the following [www] user = nginx group = nginx listen = /var/run/php5-fpm.sock listen.owner = nginx listen.group = nginx listen.allowed_clients = 127.0.0.1 pm = ondemand pm.max_children = 1500; pm.process_idle_timeout = 5; chdir = / security.limit_extensions = .php I'm using on pm.ondemand since my website has to support many concurrent connections at the same time and i was unable to to it with dynamic/static. I guess this isnt the problem because as i said earlier when i restart nginx+php-fpm at the same time, they are taking too much resources without any request. Here is the screenshot with the CPU Usage http://s28.postimg.org/v54q25zod/Untitled.png

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• How do you make Google's interface always be in your chosen language?

  - by Michael Wolf

  Google's interface and search results don't always appear in my preferred language, English. I'm located in Mexico City and, although I generally have no problem with Spanish, I would prefer search results in English most of the time. (The exception is when I'm using search terms in Spanish.) I'd also prefer the interface to be in English, but that's far less important to me than search results. Google looks at your IP to decide where you're coming from and thus what language to present results in. So, when I type www.google.com into the URL bar, it redirects me to www.google.com.mx. Is there a way to force Google to use one language all the time? Here are some things I've done and tried: 0) I have a Google account, and I've configured it such that it should know that English is my preferred language. I don't often explicitly log out of Google, so generally Google knows I'm me and my preferences when I access its services. 1) I've configured my browser to ask for pages in English. Very few sites support this feature at all; Google isn't one of them. 2) From www.google.com.mx, I can click on "Google.com in English". This works until, I think, I close the browser. 2a) From www.google.com.mx, I can go into account configuration, which is English. From then on, everything's in English. 3) I can append &hl=en (Human Language = English) to the end of the URLs of result pages. 2, 2a, and 3 all "work", but they're all mildly annoying. I'd rather avoid them if I could. (At the risk of stating the obvious, English and Spanish are the languages I'm dealing with, but I imagine that, say, a francophone using Google from Korea would run into basically the same issue.)

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• VPN on a ubuntu server limited to certain ips

  - by Hultner

  I got an server running Ubuntu Server 9.10 and I need access to it and other parts of my network sometimes when not at home. There's two places I need to access the VPN from. One of the places to an static IP and the other got an dynamic but with DynDNS setup so I can always get the current IP if I want to. Now when it comes to servers people call me kinda paranoid but security is always my number one priority and I never like to allow access to the server outside the network therefor I have two things I have to have on this VPN. One it shouldn't be accessiable from any other IP then these 2 and two it has to use a very secure key so it will be virtually impossible to bruteforce even from the said IP´s. I have no experience what so ever in setting up VPNs, I have used SSH tunneling but never an actuall VPN. So what would be the best, most stable, safest and performance effiecent way to set this up on a Ubuntu Server? Is it possible or should I just set up some kind of SSH Tunnel instead? Thanks on beforehand for answers.

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• Constant CMS Session Expiry On 1&1 Cloud Server?

  - by leen3o

  I have a couple of 1&1's 'Dynamic Cloud Servers' and running Win2008R2 and they are setup as web servers, I have a number of Umbraco CMS installs on them and they have been running fine for over a year. On Saturday on BOTH servers, a very strange thing happened - As soon as I login to the CMS/Umbraco admin I am logged out with about 5 seconds? It's as if my session expires the moment I login? I have checked everything I can as I'm not really a server admin, and everything seems to be exactly as it was last week? Like I say this has happened EXACTLY the same time (Saturday) on TWO different servers? I'm just looking for ideas of what I should be looking for? Also the front end of the sites seem fine... Its only the backend when I login. I have gone to 1&1 about this, and as usual they have washed their hands saying its nothing to do with them - When I am certain it is. How can this happen on two different servers, and affect the same sites in exactly the same way? Any help, tips, things to try would be greatly appreciated.

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• Someone used or hacked my computer to commit a crime? what defense do I have?

  - by srguws

  Hello, I need IMMEDIATE Help on a computer crime that I was arrested for. It may involve my computer, my ip, and my ex-girlfriend being the true criminal. The police do not tell you much they are very vague. I was charged though! So my questions are: -If someone did use my computer at my house and business and post a rude craigslist ad about a friend of my girlfriend at the time from a fake email address, how can I be the ONLY one as a suspect. Also how can I be charged. I noticed the last few days there are many ways to use other peoples computers, connections, etc. Here are a few things I found: You can steal or illegally use an ip addresss or mac address. Dynamic Ip is less secure and more vulnerable than static. People can sidejack and spoof your Mac, Ip, etc. There is another thing called arp spoofing. I am sure this is more things, but how can I prove that this happened to me or didnt happen to me. -The police contacted Craigslist, the victim, aol, and the two isp companies. They say they traced the IP's to my business and my home. My ex was who I lived with and had a business with has access to the computers and the keys to bothe buildings. My brother also lives and works with me. My business has many teenagers who use the computer and wifi. My brother is a college kid and also has friends over the house and they use the computer freely. So how can they say it was me because of an angry ex girlfriend.

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• SSH tunnel for socks5 proxy is slow with concurrent load

  - by RawwrBag

  I ssh to a remote AWS server using Ubuntu. I use ssh's port forwarding capabilities to do this. I have tried forwarding a dynamic port (ssh -D) or a single port (ssh -L with dante running as a remote socks server). Both are equally slow. I also tried different ciphers (ssh -c). Concurrent TCP connections pretty much do not work. For example, I can go to speedtest.net and start a test (which is fairly fast, probably maxes out my line speed) and if I try and do anything (i.e. load google.com) while the test is still running, all the additional connections seem to hang until the speed test is over. I realize OpenSSH is single-threaded. Is this the problem? It doesn't even show up on my top. Same goes for sshd on the remote server -- no processor hit. Is there anyway to bump ssh performance or should I step up to OpenVPN or something better suited for this?

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• Patch management on multiple systems

  - by Pierre

  I'm in charge of auditing the security configuration of an important farm of Unix servers. So far, I came up with a way to assess the basic configuration but not the installed updates. The very problem here is that I just can't trust the package management tools on those machine. Indeed some of them did not sync with the repository for a long time (So I can't do a "yum check-updates" on Redhat for example). Some of those servers are not even connected to the internet and use an company repository. Another problem is that I have multiple target systems: AIX, Debian, Centos/Redhat, etc... So the version could be different (AIX) and the tools available will be different. And, last but not least, I can't install anything on the target system. So I need to use a script to retrieve the information and either: process it directly or save the information to be able to process it later on a server (Which may happen to run a different distribution than the one on which the information have been retrieved). The best ideas I could come up with were: either retrieve the list of installed packages on the machine (dpkg -l for example on debian) and process it on a dedicated server (Directly parsing the "Packages" file of debian repositories). Still, the problem remains the same for AIX and Redhat... or use Nessus' scripts to assess vulnerability on the installed packages, but I find this a bit dirty. Does anyone know any better/efficient way of doing this ? P.S: I already took time to review some answers to similar problems. Unfortunately Chef, puppet, ... don't meet the requirements I have to meet. Edit: Long story short. I need to have the list of missing updates on a Unix system just like MBSA on Windows. I'm not authorized to install anything on this system as it's not mine. All I have are scripts languages. Thanks.

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• IPv6 Addresses causing Exchange Relay whitelists to fail

  - by makerofthings7

  Several of our new Exchange servers are failing to relay messages because it is communicating over IPv6 and not matching any receive connector I previously set up. I'm not sure how we are using IP6 since we only have a IPv4 network and we are routing across subnets. I discovered this by typing helo in from the source to the server that is confused by my IP6 address. I saw the IPv6 message and the custom message I gave this receive connector. (connectors with more permission have a different helo) 220 HUB01 client helo asdf 250 HUB01.nfp.com Hello [fe80::cd8:6087:7b1e:99d4%11] More info about my environment: I have two dedicated Exchange forests each with a distinct purpose. They have no trust and only communicate by SMTP. They both share the same DNS infrastructure via stub zones. What are my options? This is my guess, but I'm no IPv6 expert so I don't know which one is the best option Disable IPv6 Add the IPv6 address to the whitelist (isn't that IP dynamic?) Tell Exchange to use IPv4 instead Figure out why we are using IPv6 instead of IP4

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• Am I able to forward traffic from an external subdomain to a specific local host?

  - by George Bowman

  I apologise in advance if the question doesn't make sense, please let me know. I've got a small LAN (~10 Virtual Servers) using Win Server 2008 as a DNS server. This is behind a smoothwall express 3.0 firewall with ports forwarded for specific services. I have a domain (123-reg) with the NS's that of afraid.org (DynamicDNS) and subdomains pointed to my (Dynamic) IP address e.g. subdomain1.example.com - 123.456.789.101. I think that adequately explains my set up. My question is, am I able to have subdomains e.g. subdomain1.example.com only point to a specific local host? Like so: subdomain1.example.com:80 - firewall(external facing) - server1.example.com:80 subdomain2.example.com:80 - firewall(external facing) - server2.example.com:80 I don't actually necessarily want to use port 80, otherwise I would just use VirtualHosts on apache, it is just an example port. Currently I can use either subdomain1.example.com OR subdomain2.example.com and they will both point to server1.example.com:80 I do not have to stay using Win Server 2008 for DNS, I am more than happy to move over to BIND if needs be, it was just easier to use Win Server 2008's DNS. I do not know if this is even possible, I have a feeling it isn't as I've only got one external IP address but any information is useful!

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• How should I deploy my JVM-based web application on ubuntu?

  - by Pieter Breed

  I've developed a web application using clojure/compojure (JVM based) and while developing I tested it using embedded jetty that runs on 0.0.0.0:8080. I would now like to deploy it to run on port 80 on ubuntu. I do dynamic virtual hosting, so any request for any host that arrives on port 80 should be handled by my application. The issues that worries me are: I can still run it embedded but I'm worried about running my app as root (needed for binding to port 80). I'm not sure if I can 'give up root' when in the JVM. Do I need to be concerned by this? besides, serving web applications is a known problem and I should be using known solutions for this (jetty or tomcat) but especially tomcat seems very heavy weight. Besides, I only have one application that listens to /* and does routing internally. (with compojure/ring). What I'm trying to say with this is that tomcat by default assigns WARs to subfolders which I don't want. So basically what I need is some very safe way of binding to port 80 on ubuntu that can with minimal interference send all requests to my app. Any ideas?

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• VCL - configuration for Magento and Varnish 3.0.2

  - by Tomas

  I would like to kindly ask if there's someone who can help me configure Varnish for Magento to reach far more hits. My current ratio from varnishstat is: cache_hit=271 cache_miss=926 I'm kindly asking this because I've googled almost every site related to this theme, but 99.9% of configurations don't work because of outdated code. Details of my set-up: I use Varnish on port 80, Apache on port 81, PageCache as Magento varnish module, APC for PHP speed and Memcached for dynamic caching. Load speed is about 1.5s on home-page (Pingdom.com average results) USA ping & 2.5s Europe. Servers are located in Toronto, Canada. EDIT: This is my full VCL configuration http://pastebin.com/885BzHCs (I just use xxx.xxx.xxx.xxx for my IPs) This is the info from the command (varnishtop -i TxHeader -I Cookie): TxHeader Cookie: frontend=965b5...(*lots of numbers); adminhtml=3ae65...(*lots of numbers); EXTERNAL_NO_CACHE=1 "(*lots of numbers)" is just my adding to the info Any idea how to avoid Varnish hitting this cookies? (If I got correctly the idea about avoiding Vanrish hitting the cookie and not caching the home page). Thank you for any help!

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