Debian :: Networking Disabling Interface When Router Is Down?
Jan 27, 2011
I have a Debian computer with 2 network interfaces. Ath0 for wifi and eth0 for cable.
They're configured as dhcp and are getting their ip from different routers. When I shut down one of the router, it takes 5 minutes for the ip address to "Go away". I would like this to take a shorter time. I figured it must be a setting, but my attempts so far have been unsuccessfull. Is there a way to do this?
I'm looking for a router than has an RJ45 WAN interface, and at least 2 RJ45 LAN ports.It also needs to have WPA-AES capability and an SPI based firewall.i saw this one but was a bit concerned about the 3G 'tag' in its name. could i safely assume it will function as a normal router?e.
The challenge: I am trying to setup a piece of hardware that is transparent to the network that transfers ip packets between two interfaces without adding a "hop". Details The particular problem I'm having is that one interface is ppp, the other is ethernet. It is trivial to setup a bridge between two ethernet devices but I am having trouble finding anything for ppp<->ethernet.
Here, the ppp link is an internet connection, and the ethernet connection has exactly one device attached. Once the ppp link is negotiated, I want the ppp peer to think it's talking directly with the device on my ethernet interface and I want the device on my ethernet interface to think it's talking directly to the ppp peer.
Current solution: The best solution I currently have is to alter the routing table. When the ppp link is negotiated, I am given an ip address. I add a route that directs everything to that ip address to the eth0 device. I also set a default route to the ppp device. Now, anything that comes from the ethernet side gets forwarded to the ppp side, and anything directed towards my ip address gets forwarded to the eth0 side.
I tried to setup a connection as below but face some problem (probably route table setting incorrect). Hope if anyone could shed the light.Basically, I have a PC1 (.1) and PC2 (.130) connected via a PC router. PC router has 2 interfaces: wireless (.2) and ethernet (.129). PC1 connects to PC router via LAN cable/wireless interface, while PC2 connects to PC router via cable. This settings try to simulate 1 wireless connection along the path (and because PC2 is too old to support wireless interface, we need a PC router). These interfaces are all under same 172.16.130.x subnet.
eth1= WAN IP= 110.88.89.66/32 Gateway= 110.88.89.65 eth0= LAN IP= 192.168.1.1/24 Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- 0.0.0.0/0 0.0.0.0/0 [Code]....
My ISP gave me IP Pool 110.88.90.68/29 to use this on my LAN. my question is how can I use this IP pool on LAN side interface. i think now its simple. 192.168.1.0 /24 is my LAN network and I can not change this, because i have near 180 PCs on my LAN.
I have my centos server behind a Linksys router. I'd like to access the router's web interface to open and close certain ports. How do I access the router's interface ?
Prior to this, I had a windows machine. I could type in the router's IP in 192.168.1.1 in the browser and get access to the interface.
I'm having trouble getting my Ubuntu 10.04 machine (Sony Vaio VGN-SR490) to connect to the Internet by way of an Ethernet cable connected directly to my router.
I'm able to connect to the Internet using this same cable using a Windows machine, so there's something wrong with the way Linux is configured.
How do I got about figuring out what the problem is and solving it?
Here are my network settings on Linux:
$ ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host
[Code].....
It looks like the network adapters list is empty. I will now install both Windows XP and Ubuntu Linux dual-boot. I'm still not able to access the internet, even through Windows. I'm wonder if this could be a hardware problem with the computer or a problem with the router itself. Other computers can connect to this same router, and work fine. (That's how I'm posting this after all!)
I just had an ATT Uverse RG installed. However my Smoothwall router that previously worked fine with the ADSL SpeedStream is no longer accepting an address assignment DHCP ip address from this new gateway. (3800HGV-B)Any thoughts ideas or experience working with this hardware? ATT only supports Windows and Mac
I have configured dhcp3-server on my debian box and I'm wanting to offer dhcp on one of the vlan interfaces. The dhcp is functioning but when I test applying it to a different vlan, the original PC can still get an IP. For example: eth1 has vlan100 and vlan200. Our managed switch has the ports configured such the pc1 is on vlan100 and pc2 is on vlan2. This works fine and I can inter-route between vlans with static IPs. Our dhcp config is currently set as:
I have a Debian 5 system with two nics. eth0 is set up with dhcp-client which will receive a public ip address from my isp. The eth1 will be for my local network and I want to use dhcp-server daemon to serve addresses to my internal network. The area I am confused about is how transmissions are getting sent between nics. I've been told to enable tcp forwarding but I don't understand how that would work since the nics have different network addresses... unless tcp forwarding is basically nat or something..
I have set up a LAN/WLAN, DDNS server, DCHP server, and a proxy/NAT server using Debian/GNU. Now I would like to redirect the host web browser to a welcome web page so the users of my network can read the terms of use and accept them before having access to the internet. Could some one help me to achieve this?
recently I have installed a suse 10 sp2 on my computer. I have a big problem about connecting to my ADSL Router. The problem is that I can't ping the router at all and the Kinternet log is prompted that
status is: disconnected trying to connect to smpppd connect to smpppd Status is: disconnected error: cannot read real interface for eth-bus-pci-0000:04:00.0
I can easily open the web page of my router with windows OS but in the suse I can not do that with firefox.
Because of the configuration of my house, I need two routers.I have a DLink ADSL router as my main router and the Belkin N1 as my repeater.I have set up the IP address in the Belkin to be 10.1.1.10 - my DLink is 10.1.1.1. I have disable the dhcp in the Belkin and set the DNS as ISP provided. [URL]..I have set the channel to 11 and in the Ubuntu Network Manger I have set the IPV4 to Link Local Only. I can see the Belkin and connect with my PC.but it will not take me through to the internet.
I'm a Debian testing user (not an experienced one) on laptop Dell Latitude D531 and has encountered a problem: I've often got my laptop slowed down very much and the message appears in a console: Disabling IRQ #19 I've searched for the solution, but failed finding the answer.
dmesg showed:
Code: [ 21.064461] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 21.067790] cfg80211: Calling CRDA for country: GB [ 21.160654] padlock: VIA PadLock not detected. [ 23.545837] fuse init (API version 7.13) [ 24.354533] tun: Universal TUN/TAP device driver, 1.6
Since this is my first post, before i describe my problem, i'd like to say regrats to all of you for maintaining here such a good support community.
So, here we go: I have a headless Debian box and i want to set it up as a small office router/gateway. On the box i installed a regular NIC and a Viking Traverse ADSL+ Card which gets recognised by the OS as an 8139 ethernet card and has an embedded ADSL+ modem. The modem is accesible through the PHY interface once it gets assigned an IP. Having said that here is the actual setup:
eth0 : Viking Card eth1 : NIC (this NIC is connected to a switch) eth0 : 192.168.1.2 (internal modem is on 192.168.1.1) eth1 : 192.168.1.3 /etc/network/interfaces
I want to set up a Linux box as a wireless router to replace our existing Netgear WNR1000 router, as I believe the Netgear does not support the coming IPv6 protocol. Unfortunately, it is not flashable with OpenWRT or DD-WRT presently.
As we have Comcast, our cable modem acts as a dumb modem according to the customer support guy I talked to, and our router is the one that asks for the IP address from DHCP. Thus, when Comcast switches over to IPv6, I don't believe my existing router would work, correct?
My idea is to take a Linux box and put two NICs and a wireless adapter in it, using IPCop or Smoothwall to set up a router. I could then enable IPv6 support for when we have IPv6 with Comcast. Is that possible? Would there be a way to get BIND to hand out private IP addresses in the same subnet on the both the LAN NIC and the wireless card?
I have a desktop PC running Ubuntu 9.10 and Windows 7, and a Eee PC 701 laptop running EasyPeasy Ubuntu 9.04. I'd like to connect the desktop to the laptop with a wired connection (eth0), then the laptop to my ADSL router using wireless (ath0).
I have a crossover ethernet cable (I bought on ebay). I have set up my laptop with a static IP address on my LAN and it uses OpenDNS.
I have added this to /etc/sysctl.conf on the laptop:
This is a variation on what I found on other sites describing how to set up a router. I don't understand iptables very well, but I gather that the above two lines should set up forwarding so that traffic from my router to the laptop will be forwarded to the desktop, and vice versa.
But this doesn't work. The connection doesn't even establish between the laptop and the desktop.
I'm having trouble getting my network set up the way that I want it/had it. You see, when I first set up my network, I just had my cable modem going directly to my standard wired router (A D-Link DI-604), which had DHCP,and was connected to all of the computers on my network. I had one switch hooked up to one of the ports of the router, but this was a regular switch, and it would not try to assign IP addresses, it would just pass through the DHCP info as I wanted.
Now however, my network setup has changed. My room mate and I both got laptops, and we decided that we wanted to have wireless access so we didn't have to constantly plug in to the router.
Now my network is set up like this: The modem is hooked up to the router(DI-604), which is hooked up on the LAN side to our computers, our switch (which is hooked up to 3 more computers), and to a wireless router card (A Gigabyte GN-BC01).
The wireless router card has two jacks for ethernet. One for WAN, and one for LAN. The LAN side we have plugged only into the computer in which the card is installed.
Now the problem is this: The wireless router card comes with DHCP by default, and it's assigning addresses to the laptops and to the computer hat it's in, and worse, the IP addresses are on a different subnet than that of the main dlink router. The Main (dlink) router assigns addresses from 192.168.0.1 (itself) to 192.168.0.254, while the wireless router card assigns addresses from 192.168.1.1 to 192.168.1.254 (itself).
Because of this, I cannot access services on the wireless network from my wired network or vice versa. The first thing I tried was setting the card to assign addresses from 192.168.0.12 to 192.168.0.253, however it just said "internal error" when I tried to do this. I decided that this may be because it sees that it was being assigned an address on it's WAN side on the same subnet. So the next thing I tried was disabling DHCP and setting the "LAN IP Address" to 192.168.0.12, hoping that the DHCP would just go through the card, like a switch. I would have set the LAN IP address to be assigned by DHCP, but this was not an option, so I decided that'd be the best thing to set it to.
Once again however, setting the LAN ip address to an address on the same subnet as that of the IP assigned to it's WAN side caused it to report an "internal error". I verified that this was the issue by setting the LAN address to several other private IP addresses to test (I.E. 10.0.0.1, 192.168.3.1, 192.168.5.12).
My question then really is: How do I set up both routers so that I can access services and computers from each network from the other network. Should I set them with different subnets and set the gateway on the wireless network to the main router? To the wireless router card? Should I put them on the same subnet? Will it know how to communicate?
Here is a link to (picture) my network diagram. Network Diagram
These r IP provided by my ISP that i've put on Fedora 8:
WAN IP:xxx.xxx.xxx.17 (eth0) Subnet:255.255.255.252 Gateway:xxx.xxx.xxx.18
Valid static(public) IP set of 2: IP:xxx.xxx.xxx.147 & 148 (eth1, eth2) Subnet:255.255.255.240
i want to run xxx.xxx.xxx.147 as a web server & xxx.xxx.xxx.148 as a ftp server. but I'm able to ping only xxx.xxx.xxx.17(WAN IP) from outside world. Can any1 tell me that how can i bring my 147 & 148 IP online without router.
Let me quickly state that I am returning to Debian after quite a long break. I am trying to relearn some things. I suppose I'm somewhat old school. As in I originally installed from rawright, back in the days when you had to do practically everything by hand. I was quite happy with config and make. I actually learned a ton back then, as I started out knowing nothing. I guess I can learn to catch up with the modern linux world.
Anyway here is my question? In the old days if I wanted something not to be mounted I would simply comment out the entry in /etc/fstab. I notice that my USB drive is mounted but does not appear in the fstab. It is in mtab, and lsusb does show it.
If I wanted to secure a system, but not totally remove usb support from the kernel, how would I prevent the automounting of USB drives? What are the configuration files that govern their operation?
Whenever I open a folder with the default browser (Nautilus), it does a quick scan of the contents. This is not a problem for normal folders, but it becomes one when a music folder contains several thousand files (I haven't yet tried with folders containing large amounts of non-music files). In such instances Nautilus sits there scanning and I can hear the hard drive seeking for a good while before it presents me with the contents of said folder. My music folder, for instance, contains some five thousand ogg files, and I have to wait *counts* a full minute before it displays its contents. I tried telling it to never count the number of files in the options, but it didn't help. So far, the only solution I've found is to use pcmanfm instead, which apparently does no scan and displays my music folder practically as soon as I click on it. Still, I like Nautilus more for everything else, so I'd much rather use that instead.
I have an ATI Radeon 5850 card with 2 17" monitors, plus a 46" TV via HDMI (disabled, except for BD plaback under windows) under Debian 6.0/Squeeze. When I first installed this system, it worked fine with all 3 screens (only 2 enabled at a time). Sometime in the past few weeks though, it's decided to revert to a single-display setup. I can't find any errors in the logfiles, and it works perfectly fine when I re-enabled the secondary display via the ATI Catalyst Control center.
The auto-generated xorg.conf isn't configured to use the second display (even after re-generating one using "aticonfig -initial=dual-head"), and it is not being modified when I change settings in the Catalyst Control Center.Updating display settings after every boot is just a bit annoying.
I have a laptop connected to the the net thru an adsl modem, when I switch off the laptop network interface,(thru system-config-network) the light of the laptop network card plugged in the router stays on ( green) where as in my pc, when i do the same thing , the light of my pc network card goes off in the modem
I'm trying to stop all boot time messages from appearing -- basically I'd like to have a simple blank screen from grub to xdm.
I tried everything -- used the "quiet" option in grub's config, added dmesg -n 1 to rc.local, changed console=ttySx, set kernel.printk in sysctl.conf to 4 1 1 7, and even eradicated rsyslogd altogether... to no avail. I still see all sorts of messages on my screen.
Due to some reason every-time I boot the laptop the power governors reset themselves to "ondemand". Which causes my laptop to overheat until it shut-downs. I tried adding this line to grub Code: Select allGRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=disable" which kinda worked, but only on cpu 0.
Code: Select allcpufreq-info cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpufreq@vger.kernel.org, please. analyzing CPU 0: driver: acpi-cpufreq
Dell Latitude C610 laptop with Debian Squeeze.I am using the computer as a print and file server, accessing it with ssh, so I don't need the display (which is busted anyway). I want to close the lid without having the computer suspend. Could not find a way to make it happen with gnome-power-preferences or the BIOS settings. There is a script, /etc/acpi/lid.sh, that runs when the laptop lid switch changes. Part of the script is shown here:
Code: Select allgrep -q closed /proc/acpi/button/lid/*/state # this is a file of 1 line like "state: open" or presumably "state: closed" if [ $? = 0 ] # The brackets evaluate to True when the lid is closed. then if [ x$LID_SLEEP = xtrue ]; then [ -x /etc/acpi/sleep.sh ] && /etc/acpi/sleep.sh # i.e., if this file exists, then run it. exit fi ... there's more ...
The stuff that gets executed after the if [ #$ = 0 ] is the stuff that suspends the computer. So I just replaced the brackets with something that is certain to be false, so it will never happen:
Code: Select allif [ 1 = 2 ] I admit this is FAR from an elegant solution, but it seems to work and it doesn't fubar the system.
I've moved a linuxbox from being my gateway (nat, etc) to behind a new gateway (a DD-wrt router). For transparency purposes, I'd like to continue using the old box services, and just have the gateway in front of it.
Here's what I did:
The newgateway is setup for class C, 192.168.0.0
This configuration works, but sometimes it doesn't and I haven't figured out why yet.
At sometimes, clients on the LAN get throughput rates with very little speed loss (using speakeasy speed test). They will run at 33M on the LAN, running through both the newgateway, and the oldbox, and get about 35M with directly connected to the cable modem.
Other times, it seems nothing can talk with anyone, and I am not sure why.
I know what I have done is a little unconventional, but it's a transitional thing, and I am not sure it is the cause of the problem, although it was the last things changed.
