Question about Computers & Internet
I m using a Redhat linux AS 4 proxy server in my office,in which I configure squid 2.5 for sharing the internet(BSNL dataone leased line).the band width provided by the ISP is 2 mbps,but when I check the bandwidth in http://dataone.in from the proxy server it shows around 400 kbps.
then I connect a dual boot client pc ( windows XP sp2/fedora 6) to the same port I use for the proxy server in NORTEL 8300 switch.Now I got the increased bandwidth (around 1.77 mbps) in XP but again low bandwidh with fedora.
plz tell me why linux operating system show me the low bandwidth ?
Are you going through the proxy when checking speeds? Squid is able to perform bandwidth throttling. I would lean towards a mis-configuration in the Squid config. The directive (config option) in Squid is "delay pools". For security, I stress that you implement a full blown firewall (doing NAT) and do a port redirect to make squid a transparent proxy (no proxy config needed on the client machines' web browsers). They would both run on the same machine.
Posted on Jun 16, 2008
I'm not the most experiences with Linux either, but experience in general leads me to the following:
1) Make sure that the measurements are equivalent on both. In other words the 2Mbps for the bacndwidth is measured in Bits per second, Is Linux showing you Bytes per second?
2) Bandwidth availability does not directly translate to true throughput. There is overhead with every packet of info sent over the wire. With small data transfers, the overhead becomes a large portion of the actual transfer and the "throughput" values will appear to be small. The larger the transfer of data, the less the overhead will influence the throughput. So, be careful when looking at the raw numbers.
3) In order to get a true comparison or understanding of the situation, you should be testing in a closed environment with nothing else on the network. That will provide you with the actual difference in performance of the two scenerios.
I hope this helps a bit.
Posted on Jun 13, 2008
Sorry, I have no idea about Linux. Could be the software that is causing this issue..
I have forwarded this request to other Experts here who have more knowledge on this subject. Hopefully they should respond to your query within the next couple of hours..
Posted on Jun 13, 2008
SOURCE: Low bandwidth in linux
Bandwidth is related to several factors:
- dedicated vs shared "on-ramp" (DSL is dedicated, good)
- Ethernet card used in the machine (single vs. dual buffers and piplining vs non) - don't know but it may be the card, more expensive cards are often worth the cost.
- drivers for the cards. If the Linux drivers (older than the Windows versions usually) don't allow for the dual buffers or piplining capability then you won't get the rated speed.
You may also have issues with the wrong drivers for your card. It may work but not work well - timing is everything with drivers.
Your description says that with another machine (a different card and drivers) it almost works. It is NOT the operating system. Typically Linux is faster on most things than Windows. It is NOT the BNSL provider. Has to be the card or its drivers.
Posted on Jun 19, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
The following networking job I have done in this Lab. It is enough for a small office to access or transfer file Printing and access of shared Internet in different type of operating system.
We have recently set up a home office (small laboratory) LAN. All the computers access the internet through a USB wireless (CMDA) dongle. The USB stick is Huawei EC168C and internet service provider is Reliance Infocom (India). But any USB internet dongle can be use to share internet in a LAN in the following way. And you don't need a router for that. In the areas where ISP cannot give wire line internet connection this type of USB wireless sticks are really helpful for home office.
Basic LAN Connection:
Here this lab has 4 PCs. One Windows XP, another Windows Vista starter and two RedHat Linux server systems. Here in this lab I have done the basic LAN connection using cat5 cable & RJ45 connector and an 8 port hub. I have connect the two windows based OS. Using cross cable I have connected two windows system with the hub. Then I put static IP address in Ipv4 of TCP/IP. After that I set workgroup name to join in a workgroup in windows PCs. Then I tried to ping the systems, and it was pinging. Then I have setup a home or small office network in both windows system. That I have enabled the Printer sharing. After that I can share file, data and printer through the system gateway.
Now I have to connect other two Linux PCs in this network. With same cross cable I have joined the both Linux system with the hub. Then to detect the Ethernet device I have put down "DEVICE=eth0" entry in /etc/sysconfig/network-scripts/ifcfg-eth0 file. Then I set IP address in Ethernet device in network configuration in graphical mode (or System-config-network in text mode).After doing this job I restart the network service with "service network restart" command. Then I am trying to ping the systems to one another, And It was pinging.
Now Linux system can access with each other and files also shared through SSH, Telnet,FTP using process and command.
I have configured the Linux system in the following way. First I have set the host name in /etc/sysconfig/network file by VI editor. Next I have edit /etc/sysconfig/network-scripts/ifcfg-eth0 file with "Device=eth0" to detect the Ethernet device. After that I have put the IP add in network configuration file and Restart the network service. To keep the eth0 on permanently I also use the chkconfig command.
After doing this job File sharing can be possible through network file sharing (Nfs). I have install Nfs package & shared the nfs dir by editing exports file. Then I am trying to automount the NFS dir by automounting process. So that I put automounting entry of nfs file in fstab file. After that it's automounted in other system's mount location.
Windows & Linux Networking:
Through basic LAN both OS can only ping each other. To share file or data samba server (a client server in Linux) must be configured in Linux system. So I Install smb rpm package from yum repository. Then I have Configure the samba/smb.conf file. I put the Workgroup name on Workgroup column of samba/smb.conf file. Then I Set the network IP without host to route in network in Host allow column. At last I put down all details of Samba dir, users at the end of the configuration file set the samba password. After that I restart the samba demon to up the samba server. Now files can shared through samba server. In windows I Set the workgroup name pairs with samba server and also set username and password same as samba server. Now I trying to send or access file through samba in both OS and it happened.
USB Net Connect:
Here in this lab workers are use internet from an Usb net connect. So it must be shared in Network. It is too fast so shared internet can be access easily. In Windows XP system I connect the USB netconnect & share it in network. IF all the network setting is ok then all the systems can access shared internet through gateway. Here all users use this shared internet now.
Access of Another System:
VNC Server & Viewer is software through which we can access of another system easily. I just install the software & set the password. Then I run the vnc server. After that I Put the IP add of vncserver from vncviewer of another system and type the password & start access the vnc server system. It can be access form WAN also. I just Run the Vnc server and connect the internet and I got a Wan IP add provided by ISP.
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