Fedora Networking :: MTU Change Not Working?
Dec 26, 2009
I have fedora 12. xfce
My internet not working because i need to change mtu.On ubuntu, before it worked when I changed the MTU to 1400.
Fedora:
I followed the instructions:
Changing the MTU size permanently under CentOS / RHEL / Fedora Linux
Edit /etc/sysconfig/network-scripts/ifcfg-eth0, enter
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
Add MTU, settings:
MTU="9000"
Save and close the file. Restart networking:
[Code]....
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Mar 24, 2010
I'm trying to test whether some software that I am using will behave as expected when DST change over occurs. I'm specifically testing it for the GB timezone when it enters British Summer Time (BST) and then reverts to GMT. From the information I have, BST starts: Sunday 28 March 01:00 GMT (02:00 BST)and ends: Sunday 31 October 02:00 BST (01:00 GMT )To do this test I wrote a shell script that sets the date, runs the program, checks some logs and then reverts the time.
Entering BST was fairly straight forward as all I had to do was the following: export TZ=GB
date 032800582010This set the date to be 28th March and the time to be 00:58 in the GB (GMT) timezone. As expected, the date then rolled forward to 02:00 BST. However, when I tried to do the same for coming out of BST into GMT, the time did not work out as expected. export TZ=GB
date 103101582010Setting the time as above put the time straight into GMT and not BST even though it was two minutes before the time should have rolled-over.
However if I put the following: export TZ=GB
date 103100582010the date was reported as BST!
How can I setup the time so that I don't have to wait for hour before BST ends?
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Mar 29, 2010
Running Fedora 5
We changed ip's the other day and now ssh is not working. SSH/Putty was working fine before the ip change. Everything else is working fine on the machine. The sshd_config file has not been touched at all since I've been working on the machine.
var/log/messages shows this: Code: bind to port 22 on 0.0.0.0 failed address already in use netstat -an shows that tcp is listening on 0.0.0.0:22 with no port conflicts.
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Apr 20, 2011
I've just had to change the MOBO and trying to get the serial port working, I see from previous posts there are some problems lurking in the past.
setserial -g /dev/ttyS*
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
but I'm not seeing anything from a GPS receiver in NMEA at 4800 no par 1 stp I know that was working about a year ago. I think udev was not helping ,as I was getting permission denied to the com port, I added myself to group dialout. and no message on startup now
I need to be able to talk to a piece of kit with 9600 baud and nothing. I have win32 s/w to drive it , but it falls over in wine. My laptop still has win7 on it in a tiny partition but no 9w d connector and I'm waiting for a USB converter cable. Too many variables ! I'd forgotten all the hassle of having to install drivers just to get basic things running. But as the stupid thing couldn't manage using the driver for my NIC, I was stuck with hyper-terminal, and nothing from the GPS board @4800 or another piece of equipment running at 9600. I suspect the com port on the new mobo doesn't wan to play
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Jul 17, 2009
I have a strange problem for internet. My clients (winxp - S2) can't get internet.Let me explain my scenerios. Fedora 10 with lan (eth0) having direct internet from dsl model, client (XP service pack 2) can use samba shares using dhcp (wlan0) installed in Fedora 10 box. client can ping my linux box.Now problem is: client (dosbox) can ping the google ip address (i.e ping 74.125.39.106) but can't use 'ping www.google.com'. That means ping with ip works for internet from my client. My linux box can. I can use internet from FC10 but can't use iexplorer from my client to have internet. I have enable ipmasquarding in Firewall and dhcpd is running on wlan0 for dynamic ip address of my clients.Can someone suggest me what kind of problem having I? What should i do to success iexplorer for internet? what possibly am i missing?
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Feb 17, 2009
Some people may need to change the mac address of their ethernet network cards. This can be easily done with fedora with command line. Just follow the steps below:
1. Log as root on a textual console (ctrl+F2) or through "su -" command in your console
2. Print your network configuration with ifconfig
[root@localhost ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:23:8B:6A:7E:9E
inet addr:10.1.128.244 Bcast:10.1.255.255 Mask:255.255.0.0
inet6 addr: fe80::218:8bff:fedb:7e9e/64 Scope:Link
[code].....
Here, eth0 is the ethernet interface of your system. The mac address is put in red.
3. Change your mac address using the following syntax
ifconfig eth0 hw ether 00:18:8BA:7E:90
The new value (in green) must be hexadecimal
4. if you have a dhcp server that distributes the adresses automatically, then request a new adress for your eth0 interface
[root@localhost ~]# dhclient eth0
5. Now, your interface is up and have a new mac and IP addresses. This feature may be useful if the network administrator ban you according to the mac adress, for example .........
[URL]
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Mar 26, 2011
I've just reinstalled F14 with KDE rather than Gnome and I'm finding that I'm unable to assign a static IP address to my wired connection.
KDE automatically connects via DHCP, but when I go into KDE's network manager, the eth0 connection isn't listed. In fact, no wired connection is listed. If I manually add one with the correct settings (including a static IP), it switches back to DHCP upon rebooting.
How can I get around this? Should I install the networkmanager-gnome package?
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Mar 3, 2009
I couldnt find something for changing mac address for wireless. how to do that....
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May 26, 2009
OS:Fedora core 6
I have just changed my gateway address,now I can access internet with my browser but unable to run add/remove software as it says no network connection available,system updates are not working as well. What should I do make these working?
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Oct 1, 2009
Yesterday, while trying on establishing mobile broadband, my hostname changed, and I can't make it yet. My /etc/hosts is
1 127.0.0.1 pc-194-101.fysik.uu.se localhost.localdomain localhost
2 127.0.0.1 pc-194-101.fysik.uu.se roddur
3 ::1 localhost.localdomain roddur
The second line I edited but after a reboot it inserted the first line all automatically and my /etc/sysconfig/network is
1 NETWORKING=yes
2 HOSTNAME=roddur
What I have to do if I have to change my hostname to "roddur"?
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Jan 1, 2010
I've changed my wireless network password and when I try to connect through my F10 machine, it continues to use the old password. I've changed it a number of times through the GUI that pops up (Wireless Network Authentication Required) and also through the Edit Connections GUI but they always revert back to the old password and disregard the new one.
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Feb 11, 2010
Fedora 12 What will be the correct steps changing dynamic IP to static IP on F12 console, instead of on Gnome running;
[Code]....
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Jun 26, 2011
I have just installed Fedora 15 on my desktop machine. It has found my WiFi card and has installed a driver but it is an incorrect driver. How do I remove it and install the correct one? The driver that is installed is a RaLInk RT 2800pci but the one it needs is a RaLink RT2860. This is the driver that I used with the same WiFi card in Fedora 14 using Ndiswrapper. Do I need ndiswrapper this time too?
Clicking on "Connection Information" says that the connection is active and that the driver is rt2800pci but I cannot connect to anything
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Jul 5, 2011
How to find and change mac address ?
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Apr 3, 2009
I have two network devices :
1. Intel Corporation 82574L Gigabit Network Conncection (Currently eth0, Mac=00:0e:8c:ab:c6:b1)
2. National Semiconductor Corporation DP83815 (Currently eth1, Mac=00:0e:8c:8a:70:62)
I want to change them so that the "Intel" become eth1 device and the "National" become the eth0 device.
I already tried these steps :
1. I disabled the Network Manager and enabled network
2. Edit the /etc/udev/rules.d/70-persistent-net.rules like this
Quote:
3. Change the /etc/sysconfig/network-scripts/ifcfg-eth0 and /etc/sysconfig/network-scripts/ifcfg-eth1 MAC addresses.
4. Reboot
5. After it bootup the Fedora can't recognize the devices, if I do ifconfig -a it shows "eth0_rename with FF:FF:FF:FF:FF:FF mac address".
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Jul 24, 2009
Fedora 10 (dual boot w/ XP) on Dell Optiplex with a Dell wirelessntennaI am on a university campus with campus-wide wifi network (so no router). I have a wireless HP printer that I want to be able to print to using an ad-hoc connection. The wireless antenna, networking, and wireless printing are all working in Windows XP (so hardware is OK). However, on the linux side, the wifi is really really finicky.
When I first boot up to fedora, it usually connects no problem to the campus-wide wifi network. If I try to switch to the ad-hoc printer network (which it sees), will not connect and, furthermore, it will no longer connect to the campus-wide network (and sometimes it doesn't "see" this network at all). It seems that restarting the Network Manager service sometimes helps to reconnect to the campus-wide network, but not always and I can't connect to the ad-hoc regardlessNOTE: I'm just barely a linux user, and I didn't set up my system - don't assume that I did anything that would be common sense and, if you can, walk me through your suggestions.
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Dec 11, 2009
I found problem in FC 12 release. I installed fc 12 to server (earlier there was FC 7). Then as always i realised that names of interfaces (eth0, eth1, eth2 .... eth9) changed after install. eth0 became eth9, eth1 became eth5 ... Earlier on previous fedora releases i solved this problem correcting HWADDR in ifcfg-eth files, so i linked MAC addresses to names (eth0, eth1, eth2) as i wanted in a right order. Now I can't do this. After correcting these files and restarting network sevice i constantly get a message: device ... has different mac than expected. I looked ifup-eth file and compare it with the same one in fedora 7. And i found that in fedora 7 there is function rename_device which processes if HWADDR value doen't coincide with real mac address value. See code:
# remap, if the device is bound with a MAC address and not the right device num
# bail out, if the MAC does not fit
if [ -n "${HWADDR}" ]; then
FOUNDMACADDR=`get_hwaddr ${REALDEVICE}`
if [ "${FOUNDMACADDR}" != "${HWADDR}" ]; then
curdev=`get_device_by_hwaddr ${HWADDR}`
if [ -n "$curdev" ]; then
rename_device "${REALDEVICE}" "${HWADDR}" "${curdev}" || {
echo $"Device ${DEVICE} has different MAC address than expected, ignoring."
[Code].....
But in fc 12 release there is no function rename_device!!!!!!!!! So in this case if HWADDR value is not the same as FOUNDMACADDR value (which equal to REALDEVICE mac address) i just get an error message So I can't change interfaces names, as result i can't organize right order of network interfaces as it was earlier on fc7.
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Sep 28, 2010
In gnome-network-properties I've set up two proxy locations: default and remote.
It's a bit of a fag having to change between them via the gui depending on where I am. Can the proxy be changed by command line because then I can set up a script to use the right proxy automatically? - e.g. use remote proxy if my mobile is connected via usb.
Had a google but don't think gnome-network-properties has command line options so I might be approaching this from the wrong tack.
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May 6, 2011
first time user of F14 here. Used PCLinuxOS so far. Installed F14 fine , got samba up, set the hostname of the box to fedora.linux BUT when I connect to my wireless router (Belkin) the hostname shown in the routers DHCP client list is different:
Router shows:
IP Address-----Host Name-----------------MAC Address
192.168.2.4----ralf-FK790AA-ABA-m9---00:22:5F:17:dE:98
In terminal it shows
[dagaz@fedora ~]$ hostname
fedora.linux
[dagaz@fedora ~]$
When I search the forum or google, I end up with hostsfile or samba howtos. Those settings all show the right name : fedora.linux Why does the router show ralf-FK7 etc..? and where can I change it?
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Oct 21, 2010
I use a secure connection to reach company network from outside. There's a client application "Juniper network", which creates the secured tunnel to a company network. However, the connection never survives more than 8 seconds, when it goes disconnected with the message "Route monitor alarm". From my recent search for a solution I've found that this error is caused by a change in a route table, which violates a connection policy.
"This disconnect is typically triggered by a change in the routing table of the client machine, the change is such that the split tunnel policies defined by the administrator will be violated" - from [URL]
This is how a routing table looks before, during and after the connection attempt:
Code:
[vs@dilbert network-scripts]$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.64.64.64 * 255.255.255.255 UH 0 0 0 ppp0
xxx.xxx.xxx.0 10.64.64.64 255.255.255.255 UGH 0 0 0 ppp0
[Code].....
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Apr 6, 2009
I tried doing nfs mount and it doesnt work for me. The following is the output of my "showmount -e <IP>"
Export list for <IP>:
/home/apchitra/workspace *
/home/apchitra/workspace/canmore/sdk/fsroot_2038 *
I am trying to mount one of these directories from other machine and it doesnt work. Gives me the following error.
Looking up port of RPC 100003/2 on <IP>
Looking up port of RPC 100005/1 on <IP>
mount: server 16.0.0.0 not responding, timed out
Root-NFS: Server returned error -5 while mounting /home/apchitra/workspace/canm8
VFS: Unable to mount root fs via NFS, trying floppy.
[Code]...
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Sep 4, 2009
Something happened yesterday and now DNS is not working. I have checked /etc/resolv.conf and the settings are correct. I can ping my DNS servers and perform name lookups with dig but nothing else works. Normal applications do not work because of this.
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Feb 16, 2009
Have tried both Mythdora 10.21 32bit and 64bit (Fedora 10)o get my wireless to work.Have looked at output from various suggested commands and logs and nothing jumps out. Would appreciate any suggestions. Have attached log with all commands identified and output. Wired ethernet works with no problem.
The router shows no connection activity on the wireless portion from the Linux box. I do have a laptop that I have connected to the router before and after attempting to connect with the Linux system.The only out of the ordinary message I see is (from dmesg):wlan0: privacy configuration mismatch and mixed-cell disabled - disassociate
----------------- uname -a command -------------------------------
[mythtv@EcsA780GM ~]$ uname -a
Linux EcsA780GM 2.6.27.12-170.2.5.fc10.x86_64 #1 SMP Wed Jan 21 01:33:24 EST 2009 x86_64
[code]...
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Mar 15, 2009
using fedora 9 i've problems getting bittorent to work. i have an external kerio firewall but my messages seem not to get thrue. I read about port forwarding, as a way to speed up bittorent I interprete that as bundling the port series 6881 till 6999 to ferdora:6881 so all the ports are channeld to the bittorent machine and 1 port.(tcp and Udp)
that how I did set it up, but i seem not to get a lot of throughput i guess Maybe 1kb per week, I do not know if this is what is seen as a slow bittorent.... on the firewall i see a lot of messages running arround but nothing seems to advance
what can I do, verify to get this running. (I temporarly switched off fedora's firewall( internal) is there a way to structuraly test bittorent? is my forwarding rule correct? (input multiple ports to single port?
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Apr 29, 2009
Does anybody know how to make the wireless card working on Fedora 9? I have followed the instruction from [URL] and have B43 driver installed with reset after. The driver install went fine, but where can I enable the wireless on desktop?
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Sep 27, 2009
I installed Fedora 11 on an Acer Aspire 5516 and everything works except my networking interface card. In Windows XP it is listed as an "Atheros Ar8132 PCI-E Fast Ethernet Controller" and it works. In Fedora 11 it is listed as "Attansic Technology Crop. unknown (OX1062)" and does not work. I have tried the default driver "ath5k" and also downloaded madwifi and modprobed "ath-pci" but I still get the same problem. What is weird is that the wireless does work. Is this chip not supported yet in Linux?
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Nov 15, 2009
I have been trying to get this card working for a couple of hours without much luck. I was excited to find the thread, but it doesn't seem to work for me for some reason. [URL]. I tried the manual setup method listed, but nothing shows up in Network Manager under wireless cards? Is there something I have to do to get it to show up? I think everything copied to /lib/firmware/b43 for me ok?
Running /sbin/lspci -nn reveals the following:
03:03.0 Network controller [0280]: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev 02)
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Mar 5, 2010
I installed Fedora Core 12 on a Dell Latitude 610 laptop. Networking isn't working. I tried to start networking with '/etc/rc.d/init.d network start': there were no errors or warning messages, but before and afterwards, I could not ping anything.
I tried to configure and start networking with system-config-network. The ethernet network card shows up, but the activate button is greyed out.
I can ping the loopback address 127.0.0.1 after I start networking with '/etc/rc.d/init.d network start' but I don't really know what that means.
lspci tells me that my network "card" is a "NexXtreme BCM5751 Gigabit Ethernet PCI Express".
I know the eternt cable is good because I used it on another machine.
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Aug 15, 2010
I can't seem to get CBQ / tc working when I attempt to filter ip+port. It works when I just filter on IP though, I don't understand what the problem is. Here is my CBQ file.Quote:
DEVICE=ppp0,51200Kbit, 51200Kbit
RATE=512Kbit
WEIGHT=512Kbit
[code]....
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Oct 11, 2010
i did yum install system-config-samba and it worked and installed when ever i click on it. it says it is starting up and then just crashes.
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