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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Server :: Delay Pools - Managing Internet Bandwidth Thru Squid Proxy

Jan 2, 2010

I have configured a normal squid & now I want to manage internet bandwidth thru. "squid" proxy only.
Squid proxy server ip is :-
Client PC ip addres is
Total bandwidth avaialable :- 2 Mbps
Now, I want to limit bandwith of 400 kbps for the ip address pc only. So, is there any method available for bandwidth limiting for a single pc?

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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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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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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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Networking :: Bandwidth Management Between Different Departments?

Sep 25, 2010

I am Network Administrator in a Degree College managing around 2500 Comps. My ISP has terminated its Internet link (15 Mbps) to our Linux Server (Installed 2 NIC) from where Internet connection is extended to rest of the machines in network. I am supposed to send different bandwidth to different departments say 5 Mbps to Hostel, 2 Mbps to Staff room etc. I am new to linux and don't know anything about Bandwidth Management in linux.

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Debian Configuration :: Bad Bandwidth Management Behind SSH Tunnel

Mar 2, 2016

We have an Apache Subversion (http) server for hosting our codes, and, for the 3 next month, we are behind a DSL connection (max upload 100 kB/s).

When a remote co-worker try to download a new fresh copy of our projects on his computer directly over http, the transfer goes fine : with a bandwidth monitor (gnome-system-monitor or bwm-ng) we can see that the server is trying to send ~95kB/s and the connection remains usable for others task in parallel (just a bit slower, which is normal).

But : when the remote co-worker is connected through SSH to this server, and uses tunneling to communicate with Apache Subversion, the server is sending more than 200kB/s : the connection is not usable for other tasks during the transfer as with ~102kB/s actually transferred through the DSL Line, it's completely congested and more than fifty percents of the packets are lost.

I think that I understand why : TCP/IP auto-detects the max amount of successfully transmitted bytes per second, and try not send more than this maximum value.

When the Apache server is connected to the local instance of openssh-server through localhost, packets are transmitted successfully between them. Only after, openssh-server try to send it to the client (and should retry if it's not successfull) but during that time, Apache is already giving the next one... giving this saturation effect (Apache is not aware of the saturation, or at least, not enough)

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General :: Bandwidth Management - How To Limit Connection Speed

Jan 4, 2010

In my household a number of people use the internet. Up to a maximum of 3 wired connections and 2 wireless connections at its peak, all connection through my D-LINK G604T router. The problem is, when one person is downloading or watching ..... or whatever, the others using the internet suffer. I've spent hours configuring QoS on my router, and long story short, no matter how I configure it, it just simply does not work. QoS in no way shape or form limits connection speed (which it says it should). Anyway.

I have a spare computer under my desk, and I'd like to know if I could set this up with a (free) linux distro that limits bandwidth speed per connection. For example, of the 1500 kb/ps (about) my modem pulls, is there a way to limit that to 768 or 512 per connection? so person A can still download, person B can still watch ....., and person C can still play counterstrike with a latency under 100. This would solve many, many arguments in my house I am *fairly* good with computers, but if the distro came with documentation and a GUI that would be awesome.

* TL;DR: *
Is there a linux distro I can load on a spare computer that limits bandwidth per connection, wireless or otherwise, with good documentation?
Failing that is there firmware I can use for my modem (dlink g604t) that would do the same?
Failing that do you know of any good hitmen that would solve my family arguments, ahem, permanently?

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Networking :: Setting Download Limit And Bandwidth Management Using SQUID?

Feb 28, 2010

How to set download limit using SQUID? I want to specify the download limit for a particular list in MB. Is it possible to limit bandwith for some group of machines in network?

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Networking :: Bandwidth Management With It / Ubuntu - Filter Traffics Using Tc And Iptables

Jan 1, 2011

i wanted to do bandwidth management/traffic shaping on my Internet link(have two internet connections), but i have some questions to ask: I want to know how could i for example filter some traffics using tc and iptables (e.g Peer-to-Peer,IM,Download Managers,Flash videos..) i can do filtering for known services like http,ssh,... but since these applications doesn't use one port, i am confused a little bit. I also want to do some bandwidth allocations (based on protocol) thats why i need filtering.

The other question is that currently i am using tc for bandwidth allocation and iptables for marking packets to send to these classes, am i doing it right? I mean it does work, but is it better to use for example "U32" filters for filtering? P.S: i tried to use ClearOS in gateway mode, but it doesn't have bandwidth allocation functionality. Does anyone know if i could do bandwidth allocation in ClearOS/Endian.

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Networking :: Bandwidth Management Testing - Invalid Argument Error

Nov 29, 2010

I am trying to do some bandwidth management testing, so I have developed a small script for doing so. When I try to run it it gives the error <error> RTNETLINK answers: invalid argument</error>. I have searched the net, and so far they say it has to do something with the kernel support.

the script:
tc qdisc add dev eth1 root handle 1: htb
tc class add dev eth1 parent 1: classid 1:1 htb rate 2mbit ceil 2mbit
tc class add dev eth1 parent 1:1 classid 1:10 htb rate 600kbit ceil 2mbit prio 2
tc class add dev eth1 parent 1:1 classid 1:20 htb rate 1400kbit ceil 2mbit
tc class add dev eth1 parent 1:20 classid 20:100 htb rate 700kbit ceil 2mbit prio 0 #when running this command it gives the error
tc class add dev eth1 parent 1:20 classid 20:200 htb rate 700kbit ceil 2mbit pro 1

I am running this script on a virtual machine that has ubuntu 9.04 installed.

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OpenSUSE Network :: Bandwidth Management Based On Ip - Manage Usage For Each Client?

Apr 30, 2010

I setup a server with vmware esxi 4. I installed opensuse 11.2 and I have successfully setup an internet gateway and I manually configured (static) my client IP. My question is, is there any software or commands that I could use to manage the bandwidth usage for each client? eg. only 5Mbps for, 10Mbps for, etc

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Ubuntu Networking :: Setting Download Limit & Bandwidth Management Using SQUID?

Feb 28, 2010

How to set download limit using SQUID? I want to specify the download limit for a particular list in MB. Is it possible to limit bandwith for some group of machines in network?

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Networking :: Building Router Equipped With Firewall And Acl Management?

Jul 6, 2010

I am trying to do my graduation project, it's labeled under "linux secure router", and I should build a linux based router equipped with firewall and ACL management...Some people advice me to use linux ubuntu distribution todo this I try to do that but I don't know where to start form

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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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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 :: 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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Fedora Networking :: Finding The Upcoming Bandwidth And Specify The Bandwidth Rateto Classes

Nov 18, 2010

I created a the class like this for shaping the packets with a specified bandwidth rate.....

tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 1: htb default 15
tc class add dev eth0 parent 1:0 classid 1:1 htb rate 750kbit ceil 750kbit
tc class add dev eth0 parent 1:1 classid 1:3 htb rate 600kbit ceil 750kbit prio 0

For Our Requirement:-

I dont want to specify the bandwidth rate strictly like this rate750kbit ceil 750kbit,based on whatever speed is coming which should allocate the bandwidth rate for particular class...I need one application for finding the upcoming bandwidth & Is any other method is there for specify the bandwidth rate in a classes.

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Server :: Home Server Bandwidth Usage

Jan 27, 2011

I am looking to probably make a home server act as a backup for most of my data but also as a media server. I want to host all my music and videos for the most part on the server and then regardless what computer I'm using I could listen or watch. (Another question would be could I have itunes find my music on the server and play it).

But anyway, from people with home media servers, what kind of bandwidth usage do you go through a month? Comcast (ISP) limits me to 250GB and I'm thinking this is enough for moderate usage, I just want to make sure before I start the project.

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Server :: How Much Bandwidth Does Nxserver Use

Jul 22, 2010

how much bandwidth does the nxserver client use? Some places have reasonably priced mobile broadband but they limit the Gb usage. As I have a server with unlimited bandwidth, I though I could coonnect to it through nxserver and just use the server via the connection...

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Server :: Log Bandwidth Usage Per IP

Mar 27, 2011

I'm getting DDoS attacks on my server, and I need to block all the attacking IPs.But for that I need to know which IPs are attacking me.I was thinking that I should log the bandwidth usage per IP so I can tell which IPs are using excessive bandwidth.How can I achieve this? I'm using Ubuntu 10.10.

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Server :: Perform Patch Management For Server (centOS - Debian)

Aug 26, 2010

Many software available for patch managment like OCSinventry, cfengine,puppet,redhat satellite server for linux. I want to perform patch management for my Linux server (centOS, debian) My question is how to find out which patches available for Linux and which patches i need to apply. Is there any way to find out require patches?

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Server :: Bandwidth Limiting Per User?

Aug 27, 2010

So: On the VPS / Dedicated Server Linux wich 3 users created. How can I limit bandwidth each in a separate? For example first user speed 1 MB. 5 MB second and third 10 MB. Expect some clear answers. Regards, Silviu!

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Server :: Option To Bandwidth Control?

Jan 31, 2010

what are the option in linux to bandwidth control?

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Server :: Monitor When Users Get Too Much For Bandwidth?

May 17, 2010

when the server is getting overloaded with users. At present I run the server mainly as a proxy server with about 100 users. The bandwidth at the data centre is 100Mbps connection with total bandwidth used last month = 17431.16 MB

I would like to add a VPN in future but feel that this might overload the bandwidth as instead of it just being web traffic it will the entire client TCP connections. I would like to monitor this before it gets to the stage where users are complaining but not sure how to gauge whether the proxy is being overloaded. It is used mainly for video traffic.

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Server :: Limiting A Sub-user's Bandwidth?

Jan 27, 2011

I run Debian 64-bit. I host GameServers on my machine. Yesterday, some corrupt files or error in configurations of one of the game-servers caused my whole system to destabilize. On checking, I saw one of the Gameserver's console giving Net_sendpacket spam errors. I disabled that server and things were fine then. It used up more than 100GB of my bandwidth in just 12 hours.

I deleted the server and copied all the files over again to fix that error. Now I want a prevention to this, if just in case it happens again. I want to limit a sub-user's bandwidth in Linux. Like if I want a user only to use 10GB bandwidth per month + not more than 5MB/second. Is there any way to do it?

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Server :: Peak Bandwidth Compared To Max ?

Dec 29, 2010

I have a server in a data centre, which is supposed to have a 100Mbit line. Peak rates at the moment on my server are in the region of 20Mb, which should be easily handled. Is there anyway I can trace how much more bandwidth is available at any one time or if things are becoming sluggish on the server?

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