Networking :: ISPs Content Filter Making For Based Laptops And Workstations?
Feb 8, 2011
last friday my schools isp enabled iwsva - interscan web security virtual appliance from trendmicro. all traffic is now filtered, and slowed down. videos and other videostreams are now useless. after this we have had serious problems using our netbooks with ubuntu, and upgrading workstations with ubuntu has become very problematic, or almost impossible. i have to run the update process 6-8 times before all packages are updated.
what can i do to document the problem in a good way. the isp tells me that there are no problems, and that it has to be a linux problem. (ever heard that one before?) the ltsp-clients on my debian servers does not have the same problems, maybe because they are using the proxy on this server?
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May 7, 2011
My linux machine is connected to the outside internet, and I have a minecraft server running on an internal machine (192.168.1.201). Right now, I am forwarding port 80 on the linux machine to 192.168.1.30, which is working.
iptables -t nat -I PREROUTING -i eth0 -d 192.168.1.30 -j DNAT --to-destination 192.168.1.201
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED,RELATED -j DNAT --to 192.168.1.201
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I want to filter out the GET/POST requests and forward them to port 8080. I can't seem to get that working.
I've tried this:
iptables -A INPUT -d 192.168.1.30 -p tcp --dport 80 -m string --algo bm --string 'GET' -j REDIRECT --to-ports 8080
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Feb 22, 2010
Are Intel wireless cards compatible with non-intel-based laptops? In my case I wish to upgrade the current Atheros-based mini pci express wifi card with the Intel 4965agn. It is an Asus 4520 with an AMD Athlon X2 processor and nvidia nForce chipset.
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Aug 25, 2009
I want to write a program to filter web content. I believe that i can write a filter program by usig java however problem is that how can i place this program like "internet -> filter -> web browser" ?
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Aug 6, 2010
We have approximately 100 retail locations that will have split vpn tunneling. Intranet traffic will flow over the vpn to the corporate headquarters, voip traffic will tunnel to a regional hub and internet bound traffic will go over the local isp. The retail locations are small with 1-8 users and no enterprise grade equipment (servers, etc). This setup in effect will render our current content filtering solution useless.
The locations will be equipped with Cisco ASA 5505 Firewalls. The original plan was to use a Websense server and the url filtering feature to act as a content filter. I just found out that pricing for Websense was not included in the budget will be a show stopper.There may also be some performance issues with this method. Putting a proxy server at each location is not really an option. We do not have the resources to place a server at each location, plus the users could simply unplug an inline device or go around it. There is minimal supervision at most of these locations.
Ideally, I would like to find a way to use something like Dansguardian with an ldap interface and the url filtering feature of the ASA firewalls. I found a program called n2h2p, but I can find 0 documentation for it. It is also 2 years old with no updates. I also need to be able totrally manage this as trying to keep up with 100 different configurations for 400 users would be virtually impossible for the amount of time I will have available
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May 30, 2010
I have the following command that I run on cygwin:
find /cygdrive/d/tmp/* -maxdepth 0 -mtime -150 -type d | xargs du --max-depth=0 > foldersizesreport.csv
I intended to do the following with this command: for each folder under /d/tmp/ that was modified in last 150 days, check its total size including files within it and report it to file foldersizesreport.csv however that is now not good enough for me, as it turns out inside each
/d/tmp/subfolder1/somefile.properties
/d/tmp/subfolder2/somefile.properties
/d/tmp/subfolder3/somefile.properties
/d/tmp/subfolder4/somefile.properties
so as you see inside each subfolderX there is a file named somefile.properties inside it there is a property SOMEPROPKEY=3808612800100 (among other properties) this is the time in millisecond, i need to change the command so that instead of -mtime -150 it will include in the whole calculation only subfolderX that has a file inside them somefile.properties where the SOMEPROPKEY=3808612800100 is the time in millisecond in future, if the value SOMEPROPKEY=23948948 is in past then dont at all include the folderin the foldersizesreport.csv because its not relevant to me.so the result report should be looking like:
/d/tmp/,subfolder1,<itssizein KB>
/d/tmp/,subfolder2,<itssizein KB>
and if subfolder3 had a SOMEPROPKEY=34243234 (time in ms in past) then it would not be in that csv file.so basically I'm looking for:
find /cygdrive/d/tmp/* -maxdepth 0 -mtime -150 -type d | <only subfolders that have in them property in file SOMEPROPKEY=28374874827 - time in ms in future and not in past | xargs du --max-depth=0 > foldersizesreport.csv
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Apr 12, 2010
I have been assigned a task to implement a free open source content filter having feature of web, email, instant messaging etc. If any one has the information or worked on this type of product please share it.
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Feb 3, 2010
I want a mail server that can work just like MDaemon. The reason is, I want to have an email content filter rule that does some thing like this.
1. If the To Header contains "support@thisdomain" then run a program.
What this means is that, there is a program here in the office, and if some one sends an email to the support address, with an attachment of .exe and that person is a customer, then the program should be run. The only thing I need here is if there is a rule or script that can filter email header and run a program.
2. If the Exit Code from a previous 'Run program' rule is in the range of 1 to 100 and if the To Header contains "support@thisdomain" then send note1 "to<email address>" from <$SENDER$" "SUBJECT <AM ...>
and delete this message.
3. If the EXIT CODE from a previous 'Run program' rule is =0 and if the TO HEADER contains "support@thisdomain" then send note1 "to<email address>" from <$SENDER$" "SUBJECT <AM ...>
and delete this message.
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Oct 8, 2010
I have a very simple set up.With Network Manager I can have my laptop act as a router (sharing all connections).I also have apt-cacher-ng as a debian package cacher.I would like to set up iptables to filter only the urls that are meant for a debian package cacher.
For example:I could use a "forward all" rule:
Code:
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3142
Except then I would get a bunch of error pages every time I tried to do normal navigating.My question (again) is: Can iptables handle forwarding only on a specific url? If so how?Or is there another solution? (prferably without full fledged software like squid)
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Apr 5, 2010
PC :Personal Computer
ISP : Internet Service Provider, which gives the IP Address to the PC under him.
Suppose I have PC-A running under ISP-A and another PC-B running under ISP-B. Both PCs A, B are running in different cities. Now Im running an application on PC-B which listens for the messages that should be processed and PC-A want to send to messages to the application listening on PC-B. For this situation how does PC-A does connect to PC-B i.e. what is the IP Address of the PC-A to get connected. Do I need to give IP of the ISP-B.
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May 19, 2010
How to filter condition based on full hostname? ie. allow inbound packets to port 25 if the packet comes from [URl]..
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May 26, 2010
it is possible to have the following network configuration: a central location called A with an ISP and two more locations (let's call them B and C) with diferent ISPs and to have a vpn connection between A and B and A and C? More exactly I have a central location with a CentOS 5.3 running as a gateway and I want to know if it's possible to have a computer from the location B and C connected to A through a VPN connection. I don't want computer from B to see the computer from C, is not necessary. What kind of equipment do I have to put in places? Routers? Managed switches? As a start I think that it have to work with a router in location B and one in location C and in location A I think that a managed switch that can manage vpns it will be ok.
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Jun 28, 2011
I have a UBUNTU server 10.04 LTS with 3 network interfaces (eth0,1,2) which eth0 is connected to my lan and others connected to two different ISPs , I would like to know is there any way to share bandwidth of this two ISP for my LAN , I mean for example if eth1 has X MB bandwidth and eth2 has Y MB bandwidth my clients those who use download manager for downloading file from internet has X+Y MB download and upload bandwidth.I do not want just limiting each user or service to use one of those interfaces I want to share them for all to increasing my internet bandwidth
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Nov 2, 2010
We have MS Exchange email server with postfix/amavis on FreeBSD as proxy for anti-spam and anti-virus. We use our own developed CRM and trying to implement such functionality that when CRM manager send email to CRM client or vice versa through email client like Outlook (no plugins for CRM) this message would be shown in CRM. There is already a solution to parse emails from specific emailbox and show it in CRM.
What I need is to create postfix email filter to check if sender email is in file CRM_managers_emails and recipient email is in file CRM_clients_emails then forward that email to [URL] Filter should check both incoming and outgoing messages. I will auto generate CRM_managers_emails and CRM_clients_email files containing all such emails taken from CRM database. I know i should use something like Postfix After-Queue Content Filter but most of examples are for blocking emails.
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Jan 14, 2011
1. unzip packages.en.gz and then we update some packages version info and SHA1 value in packages file 2. generate new suse/setup/descr/packages, and zip it to packages.en.gz
3. update SHA1 value of packages.en.gz in content fileThen we try to burn an ISO to install, installation fails at the beginning because of incorrect signature of content.
cd:/content invalid signature
Alt+F3 I see the messages:
loading file:/var/adm/mount/content -> /content
[code]...
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Nov 30, 2010
Is it possible to have procmail make a decision based on the content of a attachment? My situation is the following, I dailty receive a email from a server on which a backup job of a Progress database is run. This job e-mails the results of the backup in an attachment, based on the result I would like to change the header of the message stating that the backup finished successfully or not.
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Jun 21, 2011
I a csv-file (A.csv) with a total of 4.600.000 lines. Thats to many and only a few is necessary. I have a txt-file with 150 lines (X.txt) (all lines is dataset from a mainframe and looks like abc.def.123.456. How do I remove lines from A.csv where none of the dataset from x.txt is present?
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Apr 27, 2010
I have configured a samba server where I have configured it for /mnt dir to be exported/shared. When I verify this share, I see mnt dir but I want the content inside the mnt to be visible or chroot into mnt directly.
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Oct 2, 2010
How do I setup a host computer to accept display from laptops in a group of laptops?
I have a group of people each set to manage a specific task. I have a projector in the middle of the room hooked up to a computer. How can each user push their screens to the host computer? All computers are on a lan
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Jun 7, 2010
I have a LAMP based web hosting account (BlueHost). I have an existing simple MS Excel application which I would like to make it web based. However I am not sure what tools or features of PHP are out there that will aid me with this task. Here are some details:
1. I don't want to create an entire Excel program online. For that there are plenty of existing applications like Google Docs, MS's own online version of Excel, etc.
2. My current excel file uses some of the following excel functions:
a) SUM
b) Product Sum
c) Conditional Formatting (like changing font color if an amount is below a threshold, etc.)
d) Sorting (Date, Amount)
e) Drop Down Box to select pre-defined values
3. Ability to add/delete/modify a entry (row)
4. I don't care whether the application has the same look-n-feel as MS Excel.
As you can see it is a very simple home grown excel application with few basic mathematical functions. Here are some few thoughts that I have currently in my mind:
i) Just start coding intuitively as you would develop a normal web based application.
ii) Do (i) but use some of the PHP's excel oriented helper functions (COMs?) if there are any
iii) Use completely a different set of tools permitting that they run on LAMP environment.
I could have started with (i) but before making a costly mistake I thought I would get some opinion from the community to see if this is the right approach.
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Apr 5, 2011
I have a log file with entries such as;
Where result is 0 or more.
I want to get the list of file names where result count is more than 0 (in other words filter out files names with result 0).
File name and result are in two different lines in log file.
How can i filter file name based on result?
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Feb 21, 2010
I have 4 machines 2 running Ubuntu 9.10, and one running windowsXP, and the forth will be Windows XP,only because some of my printer functions I can only get to work with windows, previous to upgrading to Ubuntu 9.10, I had everything working fine, my windows could see my Ubuntu's and my Ubuntu could see my windows, at that tine only had 1 ubuntu, now windows cannot see ubuntu and ubuntu cannot see ubuntu, my plan is to switch to mythbuntu , when I get things working, because I plan on adding 3 more machines, I have Gadmin-Samba installed on my ubuntu machines, do I need anything else. after upgrading to ubuntu 9.10, I had a system crash and had to start all over, this is just a home network with only one user.
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Jun 8, 2010
I'm currently on a project to allow mobile computers in our vehicles to access a web application. Unfortunately, most of our users are just smart enough to be dangerous...I would like to create a large private network over a wireless (3g, 4g, whatever), but in a way that forces the users to be on that network so that I (the evil IT guy) can control what they have access to. VPN seems like a good bet, but I want to be sure that the users are forced to only connect through it. As it stands, they're going to be using XP-based toughbooks.
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May 18, 2011
I am looking to build a Ubuntu based web filter. What we would like it to do is block access to certain sites for our company. We have had several employees get caught spending hours on end on gambling sites so we would like to restrict access to websites on a per user basis.What I am looking for is a piece of software or suite of software that can filter websites based on a blacklist/whitelist or category based scenario. I need to be able to authenticate users. For example I would like it so that when the CEO logs in he can go to whatever website he wants, while most other staff members are blocked from accessing things in the blacklist or categories.
I remember from a recent trip to a hospital that they had all internet traffic re-routed to their landing page and that you had to agree to specific terms on that page before you could do anything else. Something like that might be useful as well.
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Feb 8, 2010
15.4 inch laptops tend to be slightly cheaper than 14-inch laptops? Supply and demand? and if you do not mind answering another question, what's your perspective on uncle Larry eating Sun?
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Jul 2, 2009
If any of you have successfully created a video hosting server with Fedora, can you give me any ideas of what software to get and how to configure it and so on? Or, if you have been unsuccessful, can you tell me what doen't work?
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Mar 21, 2009
I and my friend use FC10 on our laptops. We want to share our data by creating a wired network between our machines because a wireless router is something what our pockets can't afford. What should I do for it? What type of wires and stuffs do I need? I Googled for some link for doing so in FC10 but couldn't find.
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Feb 19, 2010
How can I share files between two laptops, both running Ubuntu 9.04, home wifi network situation?
There seem to be lots of Samba type programs etc, but I just want to know the simplest most straight forward way.
What needs to be in installed on each machine etc..
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Apr 28, 2010
I have two laptops with Ubuntu 9.10
I want to connect them with a wireless router. phillips snb5600 router.
So I can go online and share files with both laptops
My LG E500 laptop to function as a modem with a connection to the internet with a 3g usb modem.
There are built-in wireless LG E500.
My other laptop is an old webtech without wireless built in, but I have a wireless USB thing fully with snb5600 Router. Ubuntu can find the wireless USB thing. so it's not a problem.
Both laptops can also connect with the router with cable.
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Jul 12, 2011
I have 3 laptops with 3 different OS - XP PRO, Win7 and Ubuntu (Linux). I try to connect to Internet in different locations using 2 different Internet Service Providers (ISP) and straight cable connection (not wireless).
Scenario 1: ISP number 1 - all 3 laptops can access Internet
Scenario 2: ISP number 2 - only Microsoft OS based laptops can access Internet
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