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• No Internet for Created VLan on Cisco CE500

  - by Jennifer

  I'm new here and also with networking but i can't set internet conection for some vlan created. I have a Cisco CE500 switch and created 4 vlans define by the roles in the switch. Vlan 2: Servers (role) (port 3-4) Vlan 3: Desktop (role) (port 5-8) Vlan 4: Guest (role) (port 9-12) Vlan 1 is default, Connect to the ADSL Modem/Router Port 2 assign to the Router Role (vlan 1) The switch is connected on port2 the ADSL Modem (DHCP) 192.168.2.254 The goal is: All Vlan should have internet connection. Vlan 2 and 3 should see each other but not Vlan 4 I can enter the switch CLI but dont know which command to enter. Thanks 4 ur time and replies Jennifer

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• estimating size of reply HTTP headers

  - by Guanidene

  I am trying to download a file via a basic socket connection, using a HTTP GET request. So, I have to specify how many bytes of data coming in I have to read from the socket. However, I am having trouble deciding the amount of data (say, in bytes) the server would reply back with. I know that there is a "Content-Length" field in the reply sent by server, but that gives me the size of the actual data (without the http headers). Is there a way to get the exact size of HTTP headers sent by the server or an estimation is required? (I am doing this for downloading on a mobile network, where every bit of data matters in terms of time and money, so I don't wish to make an unnecessary larger estimate of the header size.)

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• Java enum pairs / "subenum" or what exactly?

  - by vemalsar

  I have an RPG-style Item class and I stored the type of the item in enum (itemType.sword). I want to store subtype too (itemSubtype.long), but I want to express the relation between two data type (sword can be long, short etc. but shield can't be long or short, only round, tower etc). I know this is wrong source code but similar what I want: enum type { sword; } //not valid code! enum swordSubtype extends type.sword { short, long } Question: How can I define this connection between two data type (or more exactly: two value of the data types), what is the most simple and standard way? Array-like data with all valid (itemType,itemSubtype) enum pairs or (itemType,itemSubtype[]) so more subtype for one type, it would be the best. OK but how can I construct this simplest way? Special enum with "subenum" set or second level enum or anything else if it does exists 2 dimensional "canBePairs" array, itemType and itemSubtype dimensions with all type and subtype and boolean elements, "true" means itemType (first dimension) and itemSubtype (second dimension) are okay, "false" means not okay Other better idea Thank you very much!

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• How to enable Jetty to support cometd/reverse ajax while let it listen to port 80?

  - by janetsmith

  I would like to use cometd / reverse ajax capability of Jetty 7. I tried to configure it so it listen to port 80, instead of 8080. However, according to http://jetty.mortbay.org/jetty5/faq/faq%5Fs%5F200-General%5Ft%5Fapache.html , Apache can be configured as a HTTP/1.1 proxy to pass selected request to the Jetty using the HTTP/1.1 protocol. This is simple to configure and use, but current versions of the apache mod_proxy do not support persistent connections. As far as I know, the reverse ajax in jetty is depending on continuation (I guess it is persistent connection). So how to let jetty support reverse ajax, while coexist with apache server? Thanks.

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• Reporting available RDP sessions

  - by Sergei

  Hi All Default Windows 2003 Server has two RDP sessions available.If all of them are taken by someone else you will only be notified about it after providing your credentials. This seems like a waste of time especially in our environment where we share a lot of development server. Could a message be given as soon as you open the connection window if the connections are taken up? We can use qwinsta based script to check sessions before logon but it's still takes time. Is there a feature to do what I am asking for?

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• Why such a dramatic difference in wireless router max. simultaneous connections?

  - by Jez

  Recently, I've needed to look into buying a wireless router for a mission-critical system at work that will need to support quite a few simultaneous connections (potentially a few hundred laptops). One thing I've noticed is that there seems to be a dramatic difference between the max. simultaneous connections different routers can support; see this page for example - anything from 32 to 35,000! Why is there this degree of difference? You'd have thought that if we know how to make routers that can handle thousands of connections, we wouldn't be making stuff that's limited to a pathetic 32 anymore. Is it a firmware thing? A hardware thing? Are low-end manufacturers purposely putting low arbitrary connection limits in so people can be "encouraged" to pay more for high-end routers?

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• Can Dungeons & Dragons Make You More Successful? [Video]

  - by Jason Fitzpatrick

  Dungeons & Dragons gets a bit of a bad rap in popular culture, but in this video treatise from Idea Channel, they propose that Dungeons & Dragons wires players for success. There are some deeply ingrained stereotypes about Dungeons & Dragons, and those stereotypes usually begin and end with people shouting “NERD!!!” But the reality of the D&D universe is a whole lot more complex. Rather than being an escape from reality, D&D is actually a way to enhance some important real life skillz! It’s a chance to learn problem solving, visualization, interaction, organization, people management… the list could go on and on. Plus, there are some very famous non-nerds who have declared an affinity for D&D, so best stop criticizing and join in if you want to be a successful at the game of life. While we’re trying not to let our love of all things gaming cloud our judgement, we’re finding it difficult to disagree with the premise that open-ended play fosters creative and adaptive thinking. Can Dungeons & Dragons Make You A Confident & Successful Person? [via Boing Boing] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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• Changing path to basedir of mysql

  - by shantanuo

  When-ever I need to start mysql from command line, I need to cd to the base directory and then use mysql command as shown below: # cd /home/ec2-user/percona-5.5.30-tokudb-7.0.1-fedora-x86_64/ # ./bin/mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 mysql> How do I start mysql simply by typing "mysql" at command prompt? I tried to export the path but it did not work. export path=$PATH:/home/ec2-user/percona-5.5.30-tokudb-7.0.1-fedora-x86_64/bin/

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• Nginx + PHP-FPM on Centos 6.5 gives me 502 Bad Gateway (fpm error: unable to read what child say: Bad file descriptor)

  - by Latheesan Kanes

  I am setting up a standard LEMP stack. My current setup is giving me the following error: 502 Bad Gateway This is what is currently installed on my server: Here's the configurations I've created/updated so far, can some one take a look at the following and see where the error might be? I've already checked my logs, there's nothing in there (http://i.imgur.com/iRq3ksb.png). And I saw the following in /var/log/php-fpm/error.log file. sidenote: both the nginx and php-fpm has been configured to run under a local account called www-data and the following folders exits on the server nginx.conf global nginx configuration user www-data; worker_processes 6; worker_rlimit_nofile 100000; error_log /var/log/nginx/error.log crit; pid /var/run/nginx.pid; events { worker_connections 2048; use epoll; multi_accept on; } http { include /etc/nginx/mime.types; default_type application/octet-stream; # cache informations about FDs, frequently accessed files can boost performance open_file_cache max=200000 inactive=20s; open_file_cache_valid 30s; open_file_cache_min_uses 2; open_file_cache_errors on; # to boost IO on HDD we can disable access logs access_log off; # copies data between one FD and other from within the kernel # faster then read() + write() sendfile on; # send headers in one peace, its better then sending them one by one tcp_nopush on; # don't buffer data sent, good for small data bursts in real time tcp_nodelay on; # server will close connection after this time keepalive_timeout 60; # number of requests client can make over keep-alive -- for testing keepalive_requests 100000; # allow the server to close connection on non responding client, this will free up memory reset_timedout_connection on; # request timed out -- default 60 client_body_timeout 60; # if client stop responding, free up memory -- default 60 send_timeout 60; # reduce the data that needs to be sent over network gzip on; gzip_min_length 10240; gzip_proxied expired no-cache no-store private auth; gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml; gzip_disable "MSIE [1-6]\."; # Load vHosts include /etc/nginx/conf.d/*.conf; } conf.d/www.domain.com.conf my vhost entry ## Nginx php-fpm Upstream upstream wwwdomaincom { server unix:/var/run/php-fcgi-www-data.sock; } ## Global Config client_max_body_size 10M; server_names_hash_bucket_size 64; ## Web Server Config server { ## Server Info listen 80; server_name domain.com *.domain.com; root /home/www-data/public_html; index index.html index.php; ## Error log error_log /home/www-data/logs/nginx-errors.log; ## DocumentRoot setup location / { try_files $uri $uri/ @handler; expires 30d; } ## These locations would be hidden by .htaccess normally #location /app/ { deny all; } ## Disable .htaccess and other hidden files location /. { return 404; } ## Magento uses a common front handler location @handler { rewrite / /index.php; } ## Forward paths like /js/index.php/x.js to relevant handler location ~ .php/ { rewrite ^(.*.php)/ $1 last; } ## Execute PHP scripts location ~ \.php$ { try_files $uri =404; expires off; fastcgi_read_timeout 900; fastcgi_pass wwwdomaincom; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } ## GZip Compression gzip on; gzip_comp_level 8; gzip_min_length 1000; gzip_proxied any; gzip_types text/plain application/xml text/css text/js application/x-javascript; } /etc/php-fpm.d/www-data.conf my php-fpm pool config ## Nginx php-fpm Upstream upstream wwwdomaincom { server unix:/var/run/php-fcgi-www-data.sock; } ## Global Config client_max_body_size 10M; server_names_hash_bucket_size 64; ## Web Server Config server { ## Server Info listen 80; server_name domain.com *.domain.com; root /home/www-data/public_html; index index.html index.php; ## Error log error_log /home/www-data/logs/nginx-errors.log; ## DocumentRoot setup location / { try_files $uri $uri/ @handler; expires 30d; } ## These locations would be hidden by .htaccess normally #location /app/ { deny all; } ## Disable .htaccess and other hidden files location /. { return 404; } ## Magento uses a common front handler location @handler { rewrite / /index.php; } ## Forward paths like /js/index.php/x.js to relevant handler location ~ .php/ { rewrite ^(.*.php)/ $1 last; } ## Execute PHP scripts location ~ \.php$ { try_files $uri =404; expires off; fastcgi_read_timeout 900; fastcgi_pass wwwdomaincom; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } ## GZip Compression gzip on; gzip_comp_level 8; gzip_min_length 1000; gzip_proxied any; gzip_types text/plain application/xml text/css text/js application/x-javascript; } I've got a file in /home/www-data/public_html/index.php with the code <?php phpinfo(); ?> (file uploaded as user www-data).

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• MSDTC Port 135 open bi-directionally

  - by Stephen Lacy

  I have two servers, a web application server and an SQL Server database running on its own server. I have a firewall between these two servers. Do I have to open port 135 on both the SQL Server and the Web Application Server. Does the SQL Server open its own connection to the Web Application Server on port 135 or any other port? Do I have to in component services point the Web Application Server MSDTC at the SQL Database Server? If the firewall is completely open, the settings in component services set to allow remote connections, remote administration etc is there any other settings that need to be changed in order to allow remote connections to the SQL Server MSDTC?

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• How do I run a batch file async using PSExec?

  - by Paul Mrozowski

  I have a batch file I run that, among other things, reset's the NICs in the machine. I have some watchdog software running on another machine that monitors the first one. I'd like to run this batch file using PSExec when it detects certain types of failures. The problem I'm having is that since the batch file reset's the NIC's it kills the connection PSExec has (I'm OK with that). The real issue is that when PSExec dies the batch file stops running (leaving the NIC's disabled). I've tried using the -i option with PSExec with no luck. Any ideas about basically just fire off the batch file and NOT have it stop when PSExec is disconnected?

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• Improve performance on Lync desktop sharing

  - by Trikks

  I'm using Lync 2010 server to handle some clients communication and screen sharing. The biggest issue is the performance with screen sharing, it is of rather high quality but the frame rate is very poor. I have been reading and searching a lot on the subject and 95% of all topics is about bandwidth, we have a 200/200 MBit Internet connection solely for this application. Also my test machines runs on an internal gigabit lan. The speeds between all boxes is hysterically fast. Next step was to ensure that there where some profiles for different bandwidths, so i registered some New-CsNetworkBandwidthPolicyProfile -Identity 50Mb_Link -Description "BW profile for 50Mb links" -AudioBWLimit 20000 -AudioBWSessionLimit 200 -VideoBWLimit 14000 -VideoBWSessionLimit 700 New-CsNetworkBandwidthPolicyProfile -Identity 100Mb_Link -Description "BW profile for 100Mb links" -AudioBWLimit 30000 -AudioBWSessionLimit 300 -VideoBWLimit 25000 -VideoBWSessionLimit 1500 Nothing fancy happend here either. Non of the test boxes have anything from Norton installed, they doesn't have any firewalls running (nor does the Lync server), all fences are down in this environment just for the testing. Is there any thing that I may have missed to improve the quality of this? Thanks

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• Kill ssh background process after disconnect / timeout?

  - by keflavich

  I frequently use ssh tunnels to access VNC sessions on remote machines, but this is on my laptop so the connections break when I put it to sleep for the night. If I then try to re-open the connection in the morning, I have to manually kill the ssh session, otherwise I get this error: bind: Address already in use channel_setup_fwd_listener: cannot listen to port: 1202 Could not request local forwarding. The SSH command I'm using is this: ssh -N -C -f -L 1202:localhost:5900 name@server What's the best way to have the ssh tunnel die when it disconnects? Or reset?

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• windows cache not working as it should?

  - by piotrektt

  I run windows 2012 server with data center. The setup is with 60GB of RAM. I have one file shared on VHD and when I copy this file locally the RAM cache is all used up but when multiple computers connect to the share it the cache is not used. The network is 8Gb. The whole network is around 200 computers that need to read that one file but on this setup only 10 connection kills the server. Is there any way to check what is going on? What other solution can I use to manage cache in windows?

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• How can I share files from my Windows 7 machine to my friend's Ubuntu machine?

  - by ProfKaos

  I run a Windows 7 Pro SP1 laptop as my home machine, and my housemate runs an Ubuntu 12.04.1.05 desktop. We share a WLAN. I would like to make certain locations and files available for him to read and maybe write. How can I go about this? Bearing in mind I have very little recent experience with modern Linux, and Ubuntu in particular. My first idea is to share a Windows folder with my Ubuntu VM under VMWare Player, then his Ubuntu machine can connect to my Unbuntu VM, and the two can use whatever magic Ubuntu uses to achieve file sharing. This requires my Ubuntu VM to be always running though, and that may not always be possible. I have also heard that Samba may have a feature to help here, but I know nothing about that. How can I share my Windows files with my mate's Ubuntu machine, preferably with a 1 to 1 connection, i.e. rather not using shim VM's

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• Getting around broken DNS

  - by Haedrian

  I have someone who's trying to connect to the internet from a connection where the DNS server seems to be down. They can connect if I give them an ip address, but it can't resolve normal names. I tried getting them to change the DNS used from the internet options (setting it to use Google's) - however that didn't work - apparently the isp captures all dns requests. I also tried with a proxy but that didn't work either. Is there another solution to the problem? This isn't a case of censorship or anything, so there's no need to remain anonymous or whatever - I just need a way of 'forcing' the use of another dns server or routing the internet using something else.

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• How do I analyze an Apache Bench result?

  - by Alan Hoffmeister

  I need some help with analyzing a log from Apache Bench: Benchmarking texteli.com (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Server Hostname: texteli.com Server Port: 80 Document Path: /4f84b59c557eb79321000dfa Document Length: 13400 bytes Concurrency Level: 200 Time taken for tests: 37.030 seconds Complete requests: 1000 Failed requests: 0 Write errors: 0 Total transferred: 13524000 bytes HTML transferred: 13400000 bytes Requests per second: 27.01 [#/sec] (mean) Time per request: 7406.024 [ms] (mean) Time per request: 37.030 [ms] (mean, across all concurrent requests) Transfer rate: 356.66 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 27 37 19.5 34 319 Processing: 80 6273 1673.7 6907 8987 Waiting: 47 3436 2085.2 3345 8856 Total: 115 6310 1675.8 6940 9022 Percentage of the requests served within a certain time (ms) 50% 6940 66% 6968 75% 6988 80% 7007 90% 7025 95% 7078 98% 8410 99% 8876 100% 9022 (longest request) What this results can tell me? Isn't 27 rps too slow?

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• How to schedule time-of-day upgrades

  - by Richard

  Hello, I'm responsible for about 30 Ubuntu computers at a private K-8 school. We have only a 3Mbps internet connection serving the entire campus, and I would like to ensure that updates are done in the middle of the night - so that daytime tasks are not slowed down. I'm using Ubuntu 10.04, and have set all computers to download and install security updates via the update manager. I have also installed cron-apt, and modified the config file to stagger the start times of the upgrades from about 10pm to 4am local time. HOWEVER - this morning I arrived at the school at 7:30am and all the computers were busy downloading a large security based update. Needless to say, all internet activity was slowed to a crawl (for the next 2 hours), and the computer users were very very upset. This was the event I'm trying so hard to prevent. It seems that my scheme to ensure middle of the night downloads failed, and I'm not sure why. I've also tried some schemes using unattended-upgrades & crontab, but there always seemed to be something scheduling upgrades to occur in addition to the ones I try to force at middle of the night. Is there a sure fire way to absolutely positively guarantee that updates will occur only at one specific time? It would be nice if the update manager just had a drop down menu to specify a designated time. Thanks in advance for any help you can give me.

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• proxy software that supports parallel transfer

  - by est

  Hi guys, I need to setup a really fast proxy server in a remote server, here's the scenario: The server prefetches 3KB of data, mostly HTTP resources. The server send to client 3KB of data, instead of traditional HTTP or SOCKS proxy, the server open multithreaded transfer with 3 connections, send 1KB of data per thread to each connection The client receives 1KBx3, and combine them to the original 3KB data, and return as a local HTTP proxy server. The client display the original data in browser via the local HTTP proxy The latency is not important as long as the transfer rate is good. Does any software like this exist? It's better if it's open source or free ones.

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• LPR command won't recognize CUPS printer

  - by Datapimp23

  I have a cups server with one shared printer configured on it. It prints test pages without problems. printername (Idle, Accepting Jobs, Shared) Description: desc Location: Driver: Zebra ZPL Label Printer (grayscale, 2-sided printing) Connection: socket://172.20.50.26 Defaults: job-sheets=none, none media=oe_w288h432_4x6in sides=one-sided This is the output from lpstat -t. it shows that the printer is idle and accepting requests admin@SERVER:~$ lpstat -t scheduler is running no system default destination device for printername: socket://172.20.50.26 printername accepting requests since Thu 26 Jan 2012 01:29:35 PM CET printer printername is idle. enabled since Thu 26 Jan 2012 01:29:35 PM CET Now when I want to send a printjob to it via an LPR command it won't recognize the printer /usr/bin/lpr -P printername test.pdf Result lpr: ttn_seg_zebra1: unknown printer What am I missing here ?

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• Web/Cloud Based OS with Torrent Features and Free Storage?

  - by Kristina E

  Hi, I want a web-based OS with a torrent client and I want to link it to one of the many free cloud storage solutions. I think it would be really cool to be able to check and download torrents anywhere and not use my hardware or connection until I want to transfer the files down to my actual desktop (like burning a Linux ISO or to convert the file to a IFO format). Anywyas, I created accounts at 4Shared, EyeOS, GlideOS, ADrive and iCloud and am having no luck. There is an eyeTorrent app but I can't seem to get it configured and I can't log into my cloud storage from the cloud OS. Has anyone been able to pull this off and if so would you please explain how? Thanks, Kristina

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• FTP gives me a error when uploading and deleting files [on hold]

  - by AR Games

  Here's the error I get when trying to delete files... Command: DELE index.html Response: 550 Delete operation failed. Here's the error I get when trying to upload files... Command: OPTS UTF8 ON Response: 200 Always in UTF8 mode. Status: Connected Status: Starting upload of C:\wamp\www\.DS_Store Command: CWD /var/www/html Response: 250 Directory successfully changed. Command: TYPE A Response: 200 Switching to ASCII mode. Command: PASV Response: 227 Entering Passive Mode (76,185,76,101,78,222). Command: STOR .DS_Store Response: 553 Could not create file. Error: Critical file transfer error Status: Retrieving directory listing... Command: TYPE I Response: 200 Switching to Binary mode. Command: PASV Response: 227 Entering Passive Mode (76,185,76,101,23,94). Command: LIST Response: 150 Here comes the directory listing. Response: 226 Directory send OK. Status: Directory listing successful Response: 421 Timeout. Error: Connection closed by server Status: Disconnected from server IM running windows OS and using filezilla FTP client

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• How to port forward https traffic via ssh and/or remote desktop to through several networks and PCs?

  - by donttellya

  I have the following environment: In company X I develop a application on a pc A in network A with ip address 192.168.100.50 which has to do an https request to an http server located in the intranet of company Y In company X is another pc B in network B with ip address 192.168.200.100 pc B (of company X) can access the intranet from company Y via ssh tunnel (putty) pc A (of company X) can ping pc B (of company X) note: pc A can also do a remote desktop connection to pc B) pc B can ping the http sever pc A can not ping the http server How can the https request from pc A of company X get to the http server of company Y? On which pc must be putty configured? And which settings for host, port forwarding etc. has to be done in putty? So finally the https request should go from PC A - PC B - Http Server in company Y.

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• Configure Ubuntu9.10 to see hardware of my laptop

  - by michael

  I have installed Ubuntu 9.10 on my laptop. But it can't see all the hardware of the laptop. I would like some help. my laptop has 8G (in Windows7), but Ubuntu only see 2.9G (I get this value from System Monitor under Resource tab my laptop can have 1600x900 resolution (it works in Windows7), but i can only set to 1280x800 in Ubunutu my wireless card does not work. But my wired connection works. Can you please help me in configuring my Ubuntu environment?

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• some websites not opening completely

  - by mkk

  Hi everybody, I am using bsnl broadband connection, modem: wa3002g1 os: xp(86x) / vista(64x) A few days back I have changed the modem (don't know the previous modem no) because of some issues. since then I am not able to open most of the websites in firefox, IE6/8, chrome, opera. If i connect with other network like reliance data card, those websites are opening, if i connect bsnl the problem will be same again. I called to customer care many times, but no use. Please help me to find the solution. Thank you in advance.

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