CentOS 5 Networking :: 1 Nic Serving 2 Different Networks?
Oct 2, 2009
I have 1 switch 24 ports, but I need to test some app (vm) in my box, I don't want to use other NIC, because is difficult to get another switch and setup the that network.
My network run in 192.168.2.0/24
I want to have other network for my test app 192.168.4.0/24
the 4/24 will be where I will test some app(samba PDC), is possible to enble my machine with 1 NIC to connect in both networks if my nic have the IP 192.168.2.37?
I read about aliases, but it say that the alias must be in the same network.
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Dec 11, 2009
I was just wondering if someone could tell me the best method to connect all my hardwares together to achieve better result.HARDWARES.Cable ModemNETGEAR ROUTERNETGEAR FS728TS Smart switchLINUX SERVER WITH 2NICS.I want my dhcp server to serve 3VLAN networks. I need someone to show me how to do this. What do I need to do. keep in mind, I want eth0 to be used for public address only while eth1 for LAN. DHCP will be on eth0, but I need LAN on eth1 to be relayed back to eth0. This is my school project.
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Apr 23, 2010
I have one main subnet 192.168.50.0/24 with a defaultrouter 192.168.50.1 connected to the internet. I have an NFS server on that network. Everything is working as desired and machines are able to see each other and access the internet.
Now, I would like to add two more interfaces to the NFS server (running Slackware Linux), each on its own different subnet, say 192.168.51.0/24 and 192.168.52.0/24. The clients on those new subnets should also be able to access the internet (through the router 192.168.50.1). how to setup routing? Do I need any additional hardware router in between, or just a software configuration on the NFS server?
On a side note I have VLAN capable switches (couple of ProCurve 1800-24G) and would like to separate the three subnets using VLANs instead of using three separate switches.
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Apr 16, 2011
I am trying to configure my android phone (rooted Eris running kaossfroyo 2.2) to be used as a midi controller. Which I am having enough trouble with as it is but it has raised an annoying issue that occurred a month ago when I used the phones tethering network with my laptop. After connecting the laptop to the phones network (either tether, or an Ad-hoc network created using the network manager) I am unable to switch to other networks. In other words when I'm done with the phone-laptop connection I cannot connect my laptop to my home network! When I click on the other network connection I can see that it is attempting to connect in the upper right corner of the desktop (the network icon) but it will not make the connection.
What happens is that the network indicator will make the little circle graphic as if it is trying to connect but it never will display the other circle as green indicating that it has connected. but when I disconnect from the home network that is not connecting I will get a message underneath that will say that ad-hoc network disconnected! If I am switching from the android tether it will say Android-Tether disconnected etc. Even though when I click on network manager it shows that I am attempting to connect to the home network (labeled LIBERTY in my case) upon disconnection it shows the ad-hoc or tether connection being disconnected.
I am absolutely baffled by this! The issue persists even after deleting the ad-hoc connection from the wireless settings tab!!! I would speculate that for some reason the laptop is attempting to connect to the previous ad-hoc connection despite me wanting it to connect to LIBERTY. I am very confused and hope someone can lead me in the right direction.
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Jan 7, 2010
I could use Wireless network. I could see several different networks in my range. Then suddenly the network stoppedworking, and I can no longer see any networks under "Wireless networks".The Wired networks works fine.I tried upgrading ubuntu, but nothing changed. Just to confirm, I rebooted the computer in Windows Vista (Dual boot) andconfirmed that Wireless worked fine there. No hardware problem then.The suggestions I have found on this and other forums suggest looking at the output from iwconfig and ifconfig. But since I'm a n00b at Ubuntu I don't know what to make of it.
This is the output:
emil@emils:~$ iwconfig
lo no wireless extensions.
[code]...
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Mar 28, 2010
I have another generalized question for you all. I'm thinking about setting up my server at home in a sort of 'cloud storage' capacity. What I mean by that is, I'd like to be able to basically use it as an attached drive or maybe through a browser interface and read/write files to it from the internet at other locations (work, most specifically). NFS is limited and would be a pain to setup as you need to auth every user and location. I've heard talk about SSHFS and AFS, and am looking into them but nothing has popped yet.
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Jan 23, 2011
If a request comes in for a page, which Virtual Machine (assuming there are several on the machine) does the request go to?
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Dec 24, 2010
I just did yet another fresh install of OpenSuse 11.1, (no DVD drive otherwise I would use the newer version), all updates have been performed, I installed apache2 and it's modules, php5 and some of the modules I needed, mysql, sshd for local only access, and webmin, postfix is used only for local mail between php scripts and the system, mainly because out-of-the-box, postfix is an open relay, and can take weeks to configure as an SMTP server, so I have to use php scripts that do not use a mail server, anyway.
The problem is, apache2 only seems to know how to serve php files, html files only get shown on ANY browser as source code not the contents.
I've been trying for 3 weeks,,, messing with this option, setting that option, and screwing up the system, hence reformatting and re-installing OpenSuse several times, so if anyone wants to try and get apache to serve html files properly and to have apache use mod_rewrite as default on ANY folder whether inside or outside the document root, I can give that person full ssh access. I've got to the point now, that I don't really give a damn what happens to the server.
What I should be able to do, is, leave the apache and php setting as default,,, upload either an html or php file to the document root and direct a browser to the address, and it'll work without changing a single item, the same is if that file has rewrite, it should work flawless, or if I upload an html or php file to a folder outside the doc root, I change the doc redirect to point to the folder, and it should work without changing anything else.
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Jan 19, 2009
My brother and I want to set up a server off of which we would provide the processing power for several thin clients. Is it possible to serve the thin clients with images of Windows XP to run?
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Mar 15, 2010
installed ubuntu 8.10 64bit on left over parts for file serving with windows 7, tried the sample config file that installed with it with no luck, then tried new config file, looking at the samba.org website and other peoples configurations i came up with this
[global]
netbios name = NETBIOS_NAME
workgroup = workgroup
security = user
[code]....
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Aug 5, 2010
I have a domain.com site up and running on my server. I just bought domain.net, domain.org and I would like it to point to the same site on domain.com. I am not sure how to go about doing this.I used zoneedit for my dns. So far I have pointed my 2 new domains to the same dns as my .com on zoneedit and I have created (A) ip address for them. If I did this correctly, the new domains are pointing to my server and all is left is to edit the virtualhost?
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Apr 11, 2011
I have Joomla installed at /var/www/joomla, if I navigate to http://localhost/joomla, I get a 404 error, but if I add index.php, the page loads. What is wrong?? Also I am not able to navigate to the administration part of Joomla for the same reason, typing in index.php doesn't load it in this case. Yes I have verified that all files are present in the directory.
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Apr 13, 2011
My samba domain controller will not serve up scripts upon login, and acts very slow when not connected to the Internet. Also, network browsing from windows boxes shows no computers on the network once all this happens. Once the net connection comes back up, everything is fine.
Domain server:
Ubuntu 10.04.2 LTS
Samba 3.4.7
Router: Smoothwall Express 3.0-polar-i386 3.0 (update6). Router is set up as DHCP, and appears to be serving up normal IP's when the Internet connection goes down. I can ping the domain server at its normal IP when the connection goes down.
Heres my smb.conf:
Code:
[global]
log file = /var/log/samba/log.%m
passwd chat = *Entersnews*spassword:* %n
*Retypesnews*spassword:* %n
[code]....
This only happens when our internet connection goes down. When its up, everything is works fine.
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Aug 12, 2010
I have a domain, dns hosted, and apache serving up pages. this all works fine, so far. i even have a cms running. my confusion starts when i try to host a different site under a subdomain, ie. sub.mydomain.com.i have two vhosts in apache. one is mydomain.com and the directory is /var/www/mydomain.but, when i try to add another vhost like webmail.mydomain.com, and i try to put the root directory in /var/www/webmail, it doesn't work. when i try to access webmail.mydomain.com, i just get the site on mydomain.com.I feel like i am just missing something really simple here, but i have tried searching around for solutions to no avail.
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Sep 8, 2009
After reading and trying tons of tutorials and several OS reinstalls, I'm stuck trying to load wireless on my Dell Vostro 1400 laptop. Before you say search forums! I hurry to tell I did. No solution seems to work. WLAN chipset - Broadcom's BCM4311 / BCM 2050. 1st scenario - native CentOS 5.3 drivers Although CentOS recognize WLAN card and displays it's name correctly, neither network or NetworkManager sees any of wireless networks.
2nd scenario - Broadcom's drivers Most know Broadcom has released Linux drivers. I had some more luck with them than in 1st scenario although problems occur. After successfully compiling Kernel module, wireless networks are discovered and can be successfully connected but no pages load. It seems like DNS is not resolving at all and page loading timeouts instantly. Tested on TKIP-encrypted network.
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Jun 5, 2009
I have attached a diagram to show the layout, but basically I have a server that has 2 nics. I use NIC1 for the server and its services. Im using VirtualBox to run VMs and want to use NIC2 for the VMs exclusively and I want the VMs on a different network completely from the host.Ive tried setting up NIC2 on the other network but I end up with networking problems on network1. Also I cant figure out how to tell VirtualBox to bind to the host NIC2.
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Apr 9, 2009
I don't have any background in networking. Could someone tell me what are the possible options and the best solution to join two networks together?Let's say network A has the IP address of 192.168.1.0/24 and network B has the IP address of 10.0.0.0/24. Should each end of the network has a gateway server? Or should I just setup one enough? Or do we have alternate options?
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Feb 19, 2011
I use a sitecom wl-345 network usb adapter. But whatever i tried it don't recieve networks in range. When i type airodump-ng ra0 it won't work
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Mar 18, 2010
A Linux (CentOS5.3) server is setup with apache reverse proxy. The reverse proxy server is opened to outside and an internal server is mapped to ProxyPass configuration. SSL certificate is also installed on the Apache reverse proxy server. The problem is, it is extremely slow in serving http requests through reverse proxy. There is no problem with server resources or bandwidth. When the internal server is directly accessed through Internet, there is no delay. The backend server and the reverse proxy server are also on the same switch (same subnet). When I searched the Net, there were recommendations to enable cache in Apache. I did so as follows in httpd.conf.
<IfModule mod_disk_cache.c>
CacheEnable disk /
CacheRoot "/var/cache/mod_proxy"
CacheDirLevels 5
CacheDirLength 3
</IfModule>
But still there is no progress. Do I want to enable cache in ssl.conf too? Or is there any other workaround to speed up Apache reverse proxy. Is there a way to check that caching is happening?
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Sep 4, 2011
Using Fedora 15 with Gnome 3 I am unable to configure a new network connection as the configure button is greyed out.I use a network without DHCP thus auto-connect is useless and I must enter the network configuration myself. This was simple to do in Gnome 2.x but is impossible in Gnome 3 as the configure button is greyed out when your not 'connected' to the network. Also when the auto-connect fails it switches the NIC 'off'.How am I meant to connect to a network requiring manual configuration when I can only configure networks I am already connected to?FYI: I have edited the configuration of other networks which do utilise DHCP but only after the initial connection was established by DHCP.
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Jun 21, 2010
What i need to do is setup a gateway with 2 red networks, reason being 1 is my internet connection and the other is my bDSL connection for our IP phone system and i need an IP range of traffic routed to the bDSL rather than internet, i can do this on individual PC's but id like to do it at the firewall level so i dont have to configure each machine on the network.
basically i want all traffic to go to internet except for say 203.x.x.x which i want routed to the bDSL router and let it handle it. Ive dome some reading and it seems ipcop and smoothwall cant do it so i was hoping with some tricky work maybe i can get ubuntu to do it for me.
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Aug 15, 2010
I just bought a new toshiba c655 laptop and had windows 7 on it. i made the dual boot partition on it, yada yada yada, anyway, on the windows partition i can see two networks at my house. one is mine, one is my neighbors. but when i go to the ubuntu side of things not a single wifi network shows up. i did a little combing of the forums and decided to try installing the ndisgtk package which i obviously need internet for. i thought i would plug it into an ethernet cable running straight from the modom and i could connect and download no problem. however. this has turned out to be quite a mistake. ubuntu does not even recognize the fact i have an ethernet cable plugged in. this may or may not be related, but niether my ipod or my cell phone does not show up when i plug those in and when i try to mount them i get an error message that says they could not be found. Im running 10.04.
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Oct 12, 2010
i have an acer aspire 7551, and trying to setup wireless. The WI-FI indicator is turned off. Here is the basic output that i get:
Code:
ubuntu@ubuntu:~/Desktop$ sudo lshw -C network
*-network
[code]....
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Dec 28, 2010
I installed ubuntu and i installed it using the install as a program inside windows options but when I boot into ubuntu it does not detect any networks I tried the command sudo pppoeconf it says ethernet card is not there and then it asked me to try modconf and when i try modconf it says that modconf is not installed How can i set internet connection in ubuntu 10.04 I get address assigned by DHCP
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Jan 24, 2011
I have an hp dm1z and ubuntu 10.10 64bit. After I suspend (close the lid) and wake it up (open the lid) at a different location with a network connection (wired or wireless), my system always fails to connect. I need to reboot and then it sees the network and connects fine. I have tried /etc/inet.d/networking restart, but nothing changes. The only exception to this rule are two networks that have WPA security settings and are stored. I can always switch between those two. I have tried ifconfig eth0 up & down and restart networking. I have also tried to connect manually (dhclient) and no success. None of these work. I am including the output of lshw -C network.
lshw -C network:
*-network
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
[code]....
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Feb 1, 2011
I have an MSI Wind U100 netbook running Maverick, and it has a Realtek RTL8187SE Wireless controller according to lshw. My computer can "see" some wireless networks where they are present, meaning when I click on the little network icon at the top of my screen it shows the available networks. But when I click on them to connect, the icon does its little "connecting" motion, but I never receive any message saying "Connected" and when I open Firefox and try to browse to google.com, it says "Server not found"
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Mar 22, 2011
I have an ethernet card connected to my LAN and a USB cell modem internet connection. I am running ubuntu 10.10. The problem is this: I can use either network, but only am connected to one of them. If I connect to both at the same time my speed drops to zero.f I disconnect one, the other starts working. I have done a lot of searching and reading, but it looks like I don't know how to find what I am looking for.My LAN was setup as 3 WinXP computers peer to peer. One of those computers was replaced by this one that I am having trouble with (computer A). Another one was replaced by one that is not yet on the network (computer C).Computer B dual boots Win XP and ubuntu 10.4. Mostly it ns xp for Quickbooks and BobCAD, also it is connected to the printer. My router is setup for DHCP
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Feb 11, 2010
I have an Acer Aspire 3000 and just installed a Netgear WGR614ver9.I installed FreeSpire and it works great.{well except} I am online with Eth0 now. It says the wlan0 is working but it does not see any wireless network. I tried it at a couple of places other than here where I thought it should detect a wireless network but it did not. How can I determine if it is FreeSpire or the Wireless card at fault?
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Jun 8, 2010
i need possible direction on setting up a tunnel between 2 different network. The tunnel will be used by devices from the 2 different network to communicate with each other (for eg DevA and DevB).
DevA <-> Linux A <=====================> Linux B <-> DevB
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Jan 21, 2011
I want to create different IP based groups so that I may assign different settings according to that group. For example
Group1
172.16.1.x For Officers
In this group I want to limit and add some restrictions along with bandwidth limitations. So that other group may not be effected with these settings
Group2
172.16.5.x For officials
Group3
172.16.8.x For Hostels
and so on. So according to this group settings I will allow the bandwidth, accessing of audio/video site. How I may configure these groups. How to create or define these IP groups and how restrictions be added in each group.
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