in our server, Fedora 10 64 bit in this,IP Address is automatically changing Actually IP Address is 192.168.1.50 it changing frequently.if i try to edit that to normal it is not showing options. net mask is also is changing from 255.255.255.0 to 24 After reboot the system ,through LAN it is accessible .But not through the network.
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I am doing a test on MAC learning and for that ,I need to change my MAC address of linux machine while the interface is UP. To be more clear, consider eth1 in a fedora core 8 machine. And while the interface is UP. I am running a script which changes the MAC address from 10:1:1:1:1:1 to 50:50:50:50:50:50 (i.e 50 times MAC address is changed) . When I try to change the MAC address when the interface it UP, it gives me the following error :
siocsifhwaddr : device or resource busy
I know the way of changing the MAC address by bringing down the interface but I need to know if this can be done while the interface is UP.
I have several computers at work running Fedora 12. From time to time I need to remotely connect to them, usually via ssh. Each computer is assigned an IP number automatically upon startup, however due to circumstances beyond my control they are not recognized by host name by the domain server. Therefore I require the IP addresses in order to connect rather than the host names. I have no way at present to rectify this situation.
When there is a reboot, I am not always guaranteed that the IP address will be the same as before, although in practice this is usually the case. If the IP address is changed and I am logging on remotely, I am unable to connect! I can't know the number until I am again physically sitting at the computer.
As a solution, I would like each computer to e-mail me its IP address each time it boots. My first attempt was to run a script at the end of /etc/rc.d/rc.local that runs ifconfig and places the output into a file. This file is then sent to my address using sendmail. The script works fine, but I note that the output from ifconfig at this boot stage does not contain an IP address! Obviously, it is being assigned later on in the startup process. Either that or the command ifconfig does not work the same at this stage as it does once I am logged in. I require somebody with more expertise than I to comment on that.
Finally then, my question is, at what point in the startup process is an IP address assigned and the output from ifconfig would contain this address? Is there a more appropriate place rather than rc.local in which I should run my script? Is there a more appropriate command rather than ifconfig that ought to be used instead?
---------- Post added at 05:41 PM CST ---------- Previous post was at 05:30 PM CST ----------
Let me show you my attempted solution in more detail in case you're interested. The script is called .SendIP.bash and is located in my home directory. Here's what it looks like (with some censoring to protect me from public ridicule):
#!/bin/sh
# This script will send ifconfig information to my e-mail account.
# This allows me to have the latest IP address assigned to this computer.
cd /home/MyUserName
hostname > .IPmessage
date >> .IPmessage
ifconfig eth0 >> .IPmessage
sendmail -f$HOSTNAME MyAddress@MyCompany.com < .IPmessage
As I stated above, the output from ifconfig does not contain the IP address when my script is called from rc.local.
I am using Fedora 10 and when I first installed my machine, I had a DHCP assigned address to my network card. Later on I decided that I wanted to give my machine more of a server role, so I switched to static IP using the system-config-network utility. What happened after that was that I did change the IP address and routing information, but DNS information gets lost at every reboot, so I need to type it back again.
View 5 Replies View RelatedI'm running Ubuntu server. To change the IP while I'm sitting in front of the computer, I would:
1. edit /etc/network/interfaces
2. ifdown eth0
3. ifup eth0
Remotely, I can do the first two no problem, but the ifup command causes some problems since the ethernet interface is no longer functioning. Is there some kind of script that can be written for this purpose? Maybe something that will check eth0 every so often and make sure it is running and bring it up if it isn't. Or else a script run with nohup?
I do not intend that changing the IP address will be a frequent occurrence, but when it needs to be done, it must be done reliably and without the possibility that the computer will no longer be reachable for more than a couple minutes or so.
Why changing of mac address isn't recommended? The possible reasons that I can find is:
1) it can break firewalls
2) it can break some DHCP implementations ?
Is there any other reasons that I have missed ?
I have a school project that requries me to bypass MAC filtering by changing my MAC address.I changed my mac address through the following:
Code:
sudo service network-manager stop
sudo ifconfig wlan0 hw ether 00:11:22:33:44:55
[code]....
Router: Linksys WRT54GS
NIC: D-Link DWA-645 (RangeBooster N 650 NoteBook Adapter)
i have successfully changed my MAC address. By doing:
ifconfig wlan0 down
ifconfig wlan0 hw ether AA:BB:CC:11:22:33
ifconfig wlan0 up
When I do:
ifconfig wlan0, it shows my new MAC address.
After changing, I cannot connect to the Internet. I have already disable mac filtering in my router. What did I miss out?
I've two WLAN AP's with both a different IPv6 subnet. When I change from one AP to the other, my IPv6 Global address stays valid and so is the default IPv6 gateway. After a while I get another Global address from the second AP's subnet and another default IPv6 gateway for the second subnet. Both have the same metric. IPv6 connectivity is broken now. When I disable wireless on the laptop and reenable it, it flushes all IP addresses and receives new ones and connectivity is restored. Does anyone know if this is normal behaviour or should it normaly flush all the addresses when changing network? It's a bit silly to have to disable/enable wireless all the time..
View 4 Replies View RelatedI need to know what the Iptables "code" is to change the outgoing/Incoming IP for port 53 (DNS). I'm running CentOS on a dedicated server. I very familiar with Putty and SSH. So I don't need much details, I just can't figure this out. I asked my server providor but they deleted my ticket and didn't answer me.I tried this but am not sure if this correct of working?
View 5 Replies View RelatedWhen I attach my ipod it gets automatically recognised and mounted to "/media/user's ipod". This is great but I would like to change the mount point to just "/media/ipod/" as it easier to use with gnupod (command driven ipod access oh yes!!) I've had a look around and I know how to mount devices but I'm at a lose as to how things in fedora are automatically mounted... I use gnome so from what I've read hal, dbus, and udev yeah? but I'm not sure what configuration files need to be changed. At the moment I'm just wanting to change the ipods mount point but I would like know more so any technical how-to or articles, or things to look at (I'm thinking X), to understand auto mounting would be nice too.
View 3 Replies View RelatedIf I need to adjust my network settings (rc.inet1.conf) on the fly, like if I need to be in the local network of a router I just bought (192.168.1.x), in order to change the subnet to the rest of my network (192.168.0.x), then I need to adjust the ip address of my slackware box. Up till now I have rewritten the rc.inet.conf file and then restarted the computer. I am almost positive that restarting is unneccesary, but I have not been successful in finding any other method. Maybe I am using the tool wrong, but I have tried using wicd to disconnect and then connect again once I change the rc.inet1.conf. I don't think it worked. I think I have also tried issuing a rc.inet1 restart. But I don't think that this changed my ip address either. How do you change your ip address on the quick without restarting your box?
View 7 Replies View RelatedMy desktop theme is automatically changing when ever I switch on my comp... And if I change,the effects are only partially... That is the panel and other buttons change but the file and applications design remains the same... But however if I restart, it becomes ok.
View 1 Replies View RelatedIf I change the primary ip address for DNS, do I need to reboot the server?
View 3 Replies View RelatedHow can I set the firewall to automatically ban an ip address when it scans my computer? something similar to configserver firewall for whm.
View 2 Replies View Relatedhow to do surfing in ubuntu linux. Recently i took the new broadband internet connection, so i would like to configure and set the ip address in ubuntu linux, moreover i am able to connect to internet automatically in windows XP , here the ip address is configuring automatically. but when i started the ubuntu server, my ip address is not configuring automatically , i am unable to connect to internet in ubuntu server , which i have tested in specific firefox browser , saying that network was diconnnected, however i am able to see the network notification icon which has been displayed in top of the address bar , showing that ( X ) network disconnected.
how to get resolove this issue. and same way how to set and configure ip address in ubuntu server , so i should be able to do surfing in ubuntu linux. note : i think here broadband type connection is DHCP....
Is there a way to have a directory automatically change the permissions of a file that is written to it? I have a program which saves files to a directory, and gives those files read-only permissions to members in the group. This is a problem, because other users of my computer need to be able to edit these files. The directory itself has rw permissions for group members.
I guess what I am looking for is a way for the directory permissions to "override" the permissions the program is trying to save the files as. For example, if the directory has "rw" permissions for the group, then any file saved to it will automatically get the same permissions, regardless of what the program writing the file is trying to do.
I am coming across a strange error with my gateway. When I do a "ping", this is what I get below:
k-63a5b848c6cb4:~ # ping simba
PING simba.gateway.2wire.net (192.168.1.69) 56(84) bytes of data.
64 bytes from k-63a5b848c6cb4 (192.168.1.69): icmp_seq=1 ttl=64 time=0.041 ms
64 bytes from k-63a5b848c6cb4 (192.168.1.69): icmp_seq=2 ttl=64 time=0.029 ms
64 bytes from k-63a5b848c6cb4 (192.168.1.69): icmp_seq=3 ttl=64 time=0.023 ms
64 bytes from k-63a5b848c6cb4 (192.168.1.69): icmp_seq=4 ttl=64 time=0.015 ms
Is the gateway doing something strange?
My ISP allows only one computer so I have to change the mac address.
On the other computer I use ubuntu and I've changed my mac address with both ifconfig and macchanger. The internet still doesn't work, it doesn't find the connection.
What should I do ?
[URL]
Is there any way where I can change the "from" address in the maillogs without
changing the envelop sender.
We have email users using smtp-auth with multiple email accounts but authenticating against single user account.So whenever a user sends mails through our server from any one of his multiple mail accounts,I want to be able to change the "From address" to the user he is authenticating against instead of the "from address" which he supplies, in the maillogs.
We have mimedefang running on our system,I tried using things like change_envelope_sender functions,but it only changed the envelope sender and did'nt change anything in the maillogs.
this seems silly but I am changing ISPs and need to change my notification email address (for here). Under User Menu -> Edit account it shows my email but does not allow me to change my email. Since I am able to post I assume I am logged in correctly. So what did I miss?
View 3 Replies View RelatedI use google search in the firefox address bar by pasting [url] in about:config > keyword.URL
But it automatically changes to "chrome://browser-region/locale/region.properties" in some hours or the next day and I cannot search using the address bar. I have to change it back again to make it work. This is really annoying.
I'm having difficulties mounting an FTP address to my file system automatically during boot. After a bit of research I have discovered a package called curlftpfs, I've installed this package using aptitude and I had no errors.
I've successfully mounted an FTP address manually using curlftpfs at the command line and proved to myself that this is working as it should...However, I can't get this to mount automatically and I am receiving the following error during boot when I try and mount it through /etc/fstab...
Error connecting to ftp: Failed to connect to (IP address of server): Network is unreachable
My research indicates this package should be able to do this.
I'm still a learner when it comes to Linux, but could this be because TCP/IP services are not started at the time of mounting the filesystems? I've tried a continuous ping at this computer whilst it is booting and I don't get a response until after /etc/fstab has been processed. If this is the reason, can I start them these processes earlier?
Another option would be to have a script/command run when the computer boots, but prior to MySQL loading. If this is possible, it would also satisfy my problems.
Currently my OS is Ubuntu 9.04 Jaunty Jackalope Desktop OS and my web server is Apache2. I have a public address 60.x.y.z and my pc local address is 10.x.y.z. I have a web app in my Apache2 which currently run in localhost(10.x.y.z).
I would like to enable the web app so that it could be browse from outside. I know there maybe some port forwarding process and some commands involved in order to do that. But I have no idea on the steps to do that.
I am working on implementing a protocol on NS2.34 .I really need help to solve this problem . Actually , I don't now whether the problem is generated by the tcl code or the c++ code when I run the simulation, I get this result :
Code:
num_nodes is set 64
INITIALIZE THE LIST xListHead
34
45
channel.cc:sendUp - Calc highestAntennaZ_ and distCST_
highestAntennaZ_ = 1.5, distCST_ = 550.0
SORTING LISTS ...DONE!
code....
Consider the following program:
Code:
#include <stdio.h>
#include <stdint.h>
[code]...
Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.
So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.
My files are as follows:
I'm running Ubuntu 10.10 and I'm having problems trying to assign it a static IP address. No matter what I put in the Preferences->Networking area (identifying the interface as Manual)... it still will query DHCP for an address if I run the dhclient command. I'm using to using ubuntu server where I just set the IP in the interfaces config file.
View 1 Replies View RelatedI am running my own Postfix mail server. Some time ago I noticed that most email was rejected because of the server's dynamic IP address. So I got a fixed IP address. However then I noticed that some mails got rejected due to failing the reverse DNS check. So my ISP told me to get a range of IP addresses and they could then create a PTR record for one of those addresses. That is now running but it turns out that the IP address used for the PTR record is a ... dynamic IP address. So Spamhaus PBL rejects my emails again.
View 1 Replies View RelatedI have a few external IP's assigned to me by my ISP. I have IPcop as my router/firewall. I am wondering how to bind 1 of my external ip's to my internal ip address. So I do not have to port forward, etc. For Example, 77.77.77.77 to 192.168.1.123 and on the server it see's the external IP address.
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