General :: Implement Proxy Server With Firewall?

Feb 11, 2010

how to implement proxy server with firewall and the client users should be authinticated by asking username & password while opening their web browsers and finally i want to see the websites visted list of all the client computers On cent os 5.3

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Debian Configuration :: Install A Multi-core System And Configure It To Run Several VMs, One Each For A Firewall, A Caching Proxy Server, A Mail Server, A Web Server?

Jan 25, 2011

I will be relocating to a permanent residence sometime in the next year or two. I've recently begun thinking about the best way to implement a home-based network. It occurred to me that the most elegant solution might be the use of VM technology to eliminate as much hardware and wiring as possible.My thinking is this: Install a multi-core system and configure it to run several VMs, one each for a firewall, a caching proxy server, a mail server, a web server. Additionally, I would like to run 2-4 VMs as remote (RDP)workstations, using diskless workstations to boot the VMs over powerline ethernet.The latest powerline technology (available later this year) will allow multiple devices on a residential circuit operating at near gigabit speed, just like legacy wired networks.

In theory, the above would allow me to consolidate everything but the disklessworkstations on a single server and eliminate all wired (and wireless) connections except the broadband connection to the Internet and the cabling to the nearest power outlets. It appears technically possible, but I'm not sure about the various virtual connections among VMs. In theory, each VM should be able to communicate with the other as if it was on the same network via the server data bus, but what about setting up firewall zones? Any internal I/O bandwidth bottlenecks? Any other potential "gotchas", caveats, issues? (Other than the obvious requirement of having enough CPU and RAM).Any thoughts or observations welcome, especially if they are from real world experience in a VM environment. BTW--in case you're wondering why I'm posting here, it's because I run Debian on all my workstations/servers (running VirtualBox as a VM for Windows XP on one workstation).

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Server :: Act As Firewall / Proxy - Do Bandwidth Management?

Jun 17, 2011

I wanted to implement a server for a small network, but am a bit in-experienced. The server that I want to use should be able to do load-balancing (two connections) and also act as firewall/proxy. And also it should be able to do some bandwidth management. The network that its going to serve has two parts. One part of the network should be served, say during day time,and the other during night time. The one that is going to be served at night-time should not have access to internet during day-time, but should have access to, say local mirror-server. I am a bit confused what software/hardware to use. I am planing to use EndianFirewall, but since I don't have experience, don't know if it can do all that I need (?).

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Ubuntu Servers :: Log Firewall Proxy Server For SOHO Or Parental Control?

Aug 1, 2010

If this gets moved I apologize for putting it in the wrong place...Purpose of server: RED GREEN ROUTER for SOHO or PARENTAL CONTROL Block known bad URL,IP... ie porn, malware, ads, others Block Good URL,IP if Desired by OWNER Scan mail protocols for viruses out and in if out is found log and mail MASTEROSSIBILTY??? scan all protocols in and out for viruses n block log out block log and mail MASTER a server build log and possibly a step by step assist for new users.Version of ubuntu server 10.04Hardware Gateway Pentium 4 2 network cardsUse of server RED GREEN ROUTER FIREWALL that blocks site list from shalla and my own list. general use would be for SOHO or Parental controlpick language...pick it again??? for kb...kb layout...eth0(as RED)me it...timezone...HDD choice(i used guided-use entire disk)...user...proxy if needed(not for RED GREEN ROUTER!!!)...updates(i picked auto)...LAMP,openssh, mail server ...sqlpassword...grub...done

login as user/pass created in install
run following


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General :: Having A Firewall / Proxy That Has An Extremely High Load - No Apparent Activity?

Aug 19, 2010

I have a firewall / proxy that has an extremely high load, but I can't figure out what's using it. No real cpu usage, the disks are sleeping except for a little log activity, it's on gigabit ethernet and not close to maxing out... Command link stuff runs fast, nothing seems slow, yet the load is sky-high. IME this kind of load is associated with a lot of disk I/O, but that's not the case here. What could be causing this, what else factors into the load?

uname -a:


Linux 2.6.8 #1 SMP Mon Oct 18 11:20:22 CDT 2004 i686 i686 i386 GNU/Linux


07:55:43 up 1503 days, 17:13, 5 users, load average: 26.50, 26.33, 26.25
Tasks: 245 total, 2 running, 243 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.6% us, 1.1% sy, 0.0% ni, 95.0% id, 2.7% wa, 0.2% hi, 0.5% si
Mem: 3895508k total, 3582272k used, 313236k free, 207468k buffers
Swap: 2040244k total, 112664k used, 1927580k free, 1358744k cached

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Networking :: Configure Proxy & Firewall On SuSE 11.4?

Apr 6, 2011

I need to restrict access to the internet and keep unwanted software out of LAN with 45 workstations at the school I teach at. I thought about configuring a proxy and firewall on SuSE 11.4?

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Networking :: Web Squid Proxy Behind A Hardware Firewall NAT Device?

Feb 22, 2010

I'm looking to setup a web proxy using squid.I already have a hardware firewall NAT'ing device that all the connections go through.I'm planning to install the squid web proxy on a VM (single nic) and place it behind the hardware firewall as below:internet -- modem -- Firewall --switch--squid proxy ( workstation (( workstation is connected to the same switch as the squid proxy)And on the client workstation's Internet Explorer: Tools->Options->Connection-Lan Settings and check the box for "Use a proxy server for your LAN then type the address of the squid proxy ( and set the port to 3128. Check the box for Bypass proxy server for local addresses.

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Ubuntu Installation :: Proxy Configuration - Running Apt-get Update Due To A Firewall At Work

Jun 24, 2010

I think I have encountered a problem in the way that lucid handles proxy servers. I was having problems running apt-get update due to a firewall at my work. I also noted that I was getting 403 Forbidden for wget. So I went to System -> Preferences -> Network Proxy from my account (which has administrator privileges) and input the http address for the proxy server, and then clicked the button to "Apply Systemwide...".

Following that change, wget worked from my account, but whenever I tried to sudo apt-get update, I got the 403 forbidden response again, even though I could wget the same files that apt-get reported as forbidden. I figured that this was a problem with the root account, and so I typed


However, upon exiting from the root account, and trying to run sudo apt-get update again, I got the 403 forbidden code again!

So, it seems that the proxy settings are not being applied systemwide.

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CentOS 5 Server :: Implement A Server Anti-virus Multiplatform?

Nov 16, 2009

I have a server Linux/Centos 5.3 who I have formed it like server of data with samba for a network with 5 Windows XP terminals; desire to know if it is also possible to form this equipment like server anti-virus multiplatform so that it can look for virus (and clean) to the terminals win xp.

I was looking for by the network on this subject, but I have not had favorable results, please if somebody could help with some Link or tutorial me that has found.

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Networking :: Squid Proxy Server On Ubuntu And WPAD - Proxy Auto Detection?

Dec 9, 2010

Currently my DHCP Server is working now what i want to have is auto detection of squid proxy in any browser but I still got an error in my dhcp server when I restart it.

My Config:

# DHCP configuration generated by Firestarter
ddns-update-style interim;
ignore client-updates;


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Server :: Set Up Squid3 Proxy As A Transparent Proxy & Iptables Config

Feb 23, 2011

I am trying to set up my squid3 proxy as a transparent proxy - right now, I have to manually configure browsers to access via proxy. I understand that I have to put some rules into Iptables and also some further directives in the squid.conf.

I have a couple of specific questions. The proxy server is running on a Ubuntu 10.04 workstation and this machine also acts as a dhcp server for the network. I have just one subnet , namely There is only 1 network card. Is it much easier to put in a second network card or is it just as easy to configure the existing lan card as a dual IP?

Is it necessary to configure these 2 IP's ( whether they are via 2 lan cards or dual IP on single card ) to be on different subnets. i.e ETH0 and ETH1 or is ok to have something like ETH0 and ETH1 ( where ETH0 is the one facing the LAN and ETH1 points to the modem router / switch i.e The Internet ) Where specifically do I save the Iptables rule configuration file and what must I call it ?

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General :: Access Remote Mysql Server Through Socks Proxy Server?

Aug 25, 2010

Scenario:A - Local Unix machineB - socks proxy server port 1080C - remote mysql server port 3306I want to connect to the remote mysql server(C) from local unix machine(A) using sock proxy(B).

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Red Hat :: Implement CBQ In RHEL5 Server

Sep 25, 2010

I want to implement CBQ in my RHEL5 server so that i can manage my BW.

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Server :: Implement Web Server In Home In Centos?

Jun 26, 2011

How to implement the web in my home in centos? that web should be access by out site using public IP? is it possible? how to do that?

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General :: Recommendation For Firewall Server?

Apr 1, 2009

After metering the power being used daily in my computer room, I decided that I needed to get somewhat greener. So I am updating all my equipment and getting rid of the old towers and power hungry equipment. So far so good, except for the box running Smoothwall.

It is an old IBM 300GL from the '90s that is apparently never going to die. But it is noisy and not exactly low powered and has to be on all the time. The only machines that I have presently that can be used as a replacement are full blown AMD 3000 and 6000's, and I hate to waste one of those just to be a firewall. I can find some mini cube systems that are very low powered - some even run on just a wall cube - but can't find one with two ethernet ports, and of course there is no plugin buss on a tiny box.

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Server :: Implement Rw Acl On Branch And Tag Names?

Apr 22, 2010

Does anyone have a acl patch for cvs-1.11.22-5.el5.I need to implement rw acl on branch and tag names.

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Server :: How To Implement PHPMyAdmin In RHEL 5.1

Aug 15, 2009

I configured mysql in RHEL5.1 and I tested it , it workks well, but I wish to exploit it in graphical mode. Can you assist me to implement the phpMyAdmin for me to use it in graphical mode?

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Server :: How To Implement Quota In Squid

Jul 31, 2010

How I can implement quota for my webproxy users in squid?

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General :: Is It Safe To Put Samba Server Outside The Firewall

Apr 4, 2011

Is it safe to put Samba Server outside your Firewall?

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Server :: Postfix Software - Setting Through Which Implement This?

Feb 20, 2011

I have a very peculiar issue with Postfix. lets say we have three users as user a ,user b ,user c . user a reports to user b ,user b reports to user c .Now if user a sends an email to user x then a policy is defined such that all his his email will be sent to user b not to user x. Is there any setting in postfix through which we can implement this

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Server :: Implement Quota Per Group Users?

Nov 12, 2010

I want to implement quota per group users like this: Assume i have a Student group in my system, that student1 and student2 and student3 are three users in this group. i want to set quota 100GB per each user in this group, 100GB for student1, 100GB for student2 and .... The problem is when i set quota per group i cant say each user in that group have 100GB quota limit, also when i set quota per user, i should set one by one for each user.I want to know, is there anyway for set quota for all users in specific group?

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General :: Writing Files From NFS Client To Server Behind Firewall ?

Jan 25, 2010

For some time now, I'm having some problems with configuring an NFSv4 server to let it work with a firewall. I've already searched to web, but I was unable to find a solution that works for me.

The situation is as follows:
I'm trying to connect an NFS client to an NFS server that is behind a firewall. I don't have access to this firewall, but I can contact the administrator to open some ports for me. I already did this for opening port 2049.

The result is that the client can read files from the server, but is unable to write files to the server. I believe that for writing an extra RPC-connection needs to be set up. However, the ports on which the RPC-connection is set up, seem to be different for every connection (I verified this using 'netstat -tn').

Clearly, this is a problem since the server is protected by the firewall.

Thus, what I want to do is configure the server in such a way, that it always uses the same server-side port(s) to connect with the writing clients (just like 2049 for reading). I've already tried to configure the /etc/default/nfs-kernel-server and /etc/default/nfs-common files, but that hasn't really worked out yet.

Note: Because I don't like to contact the system admin every day, I hooked up 2 computers (client/server) on which I set up the same configuration (without the firewall). I'd like to see it working on those machines first (that is, 'netstat -tn' showing the correct port), before I contact the admin to open some extra ports.

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Ubuntu Servers :: Simple Way To Implement A Mail Server?

Feb 21, 2011

I am putting a php contact form on my webpage that sends messages directly from the page to my email address. This script has worked in the past, but unbeknownst to me that is because my previous server was running a mail transfer client that handled php's mail() function through smtp. The web server I am using now is a home machine configured with ubuntu running php/apache but there is nothing to handle mail. My contact form says the message has been sent, but it never arrives to my inbox.

Following forums, I installed sendmail and verified that smtp was running on port 25, but the form would then hang for over a minute upon submission(and messages still would not be delivered). I then tried exim4 as a mail transfer agent which solved the hanging, but messages still werent delivered. From my reading it appears this could have something to do with my hosts file, but I am unsure how this needs to be configured (pretty new to all this and I seem to have bitten off more than I can chew).

I eventually configured exim4 to use the smarthost feature for outgoing mail, using my gmail account's smtp server (following a tutorial). My exim log file produces no errors, but messages from my contact form still are not delivered. This has turned out to be a huge, hair tearing situation and I'm at a loss on what to do next.

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Server :: Implement Email Alerts On Backup Scripts

Apr 28, 2011

I have recently been asked by my boss to implement Email alerts on some Backup scripts to be sent to me and another person. I edited one of the Backup scripts on a mail server and they appear to be working without problems (i.e., the backup job runs successfully and I get told so via E-Mail). However, when I implemented this script onto another, non-mail server, it would not send E-Mail confirmations. The only server that is allowed to send Emails to the outside world is the mail server, so I did not expect the script to work without any fine-tuning.

However, I thought I could direct the non-mail server to send an E-Mail through the mail server. I just can't find out how to do it. The servers are running Ubuntu 9.04 64bit. The mail server is using postfix and dovecot for email, and is also the DNS server for that particular network section. The non-mail server should be installed with the default server install (exim4). If possible, I do not want to install any new programs on either server. How to get the non-mail server to use the mail server to send out E-Mails?

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CentOS 5 Server :: Implement Virtualization Using A Remote Connection?

Jun 26, 2009

The word on all lips are "virtualization" so I decided to smell this flavor.
I have a machine running CentOS 5.3 64bit and I have unlimited access to this machine, but I don't want to reach it physically.
Is it possible to install and maintain a virtual medium using ssh or other remote connection?
When I installed the OS I have selected the packets regarding the virtualization, but now from where can I start?
Is somewhere a guide for doing this?

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General :: Proxy Server Gets Hang?

Jul 23, 2010

We are using squid proxy server in Linux and server is getting hang often, during this time when see the log file it will show like below

Jul 23 11:52:26 Linux-GW avahi-daemon[2028]: Invalid response packet from host
Jul 23 11:54:55 Linux-GW avahi-daemon[2028]: Invalid response packet from host


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General :: Git Clone Behind A Proxy Server

Jun 28, 2010

I want to clone a linux bridge repository. i'm behind a proxy server.

The command :

gives the following error

I've done
1 - sudo apt-get install socket
2 - in my home directory, a shell script called "" was created containing #! /bin/bash (echo "CONNECT $1:$2 HTTP/1.0"; echo; cat ) | socket git://MYPROXY 3128 (read a; read a; cat )
3 - chmod +x

Still not getting.

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General :: Set Up RHEL 64-bit As A YUM Proxy Server For 32-bit Also

Aug 26, 2009

Does anyone have an UP TO DATE document, or know how to set up a standard RHEL 4.1.2... 64-bit box to be a YUM Proxy machine? I have found several manuals, all being dated a while ago.

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General :: Can't Connect To Certain IP's With Proxy Server

Aug 3, 2011

I have setup a Squid Transparent Proxy that works and I can connect to most websites and block-list works and yadda yadda yadda.

My problem is that when I try to connect to a certain PC it will not work. A bit more clarity...


Connected to the DSL-MODEM is the PC in question that I can't connect to when using Squid. If I bypass the Squid from the Network and go through the router I can connect to the PC.

I want to be able to use the Squid server and still access the PC connected to the Modem and I want to have a Squid SAR report of the Network PC's accessing the PC on the modem.

The Modem/Router/Squid/Network all use the same IP range, but the PC on the modem has a different IP.

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General :: Proxy Server - Redirect ?

Sep 26, 2009

We installed the apache server on we are planning to use as a proxy server.we have 4 servers inlcuding Each of them has 3 or more applications. I would like to redirect them to is it possible. if its how to do that.

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