I need a script but i am not good at programming soWhat script have to do:- Every 1 minute is checking if ip address is available (ping)- if ip answers nothing happens- if ip does not answers: * file /etc/hosts is changed by one stored in /home/user/hosts* notification by xterm to restart some programIf finally ip answers file /etc/hosts is changed by one stored in /home/user2/hosts
View 6 RepliesIs it possible to have different /etc/hosts file for different network connections without having to go in and change it every time? The why: I have dyndns and port forwarding to get to my desktop. My laptop is sometimes on the same network, and sometimes not. Also, sometimes the dyndns doesn't update properly, or the outside connection is down, but I want to get to my desktop (and I'm too lazy to walk up the stairs). I'd like to be able to keep one set of bookmarks, ssh command aliases, etc. that would always get to it the fastest and most reliable way possible.
View 1 Replies View RelatedI was having a discussion with someone who asked me whether a Linux OS has to be rebooted when the hosts file is modified. From personal experience, on Windows I change the file but don't reboot and I've seen others do the same thing. I assume Linux has no exception(s), but is there any reason why a reboot is not required (to at least justify my actions)?
View 2 Replies View RelatedI've 3 hosts images installed in virtualbox, that every time I reboot an image, the ip address change.
The 3 images are ubuntu.
I would like to configure these images in a way that, every time I reboot the images, I can access them by the name, and not by the ip.
I have a newly installed CentOS 5.4 on Gigabyte G31M-ES2C, I had to change the motherboard since it has some problems. Unfortunately the new motherboard is a rev 2.x board, which has a different onboard NIC (old one is RTL 8102E, new one is AR8132), so now my ethernet connection doesn't work anymore (no eth0 device), I assume I need to install a new driver for the AR8132? If so, what's the steps to do so?lspci shows Ethernet controller as: Attansic Technology Corp. Atheros AR8132 / L1c Gigabit Ethernet Adapter (rev c0)
View 3 Replies View RelatedI am running an application that requires use of my /etc/hosts file. In it, I have my machine name and its LAN ip address. The program creates a service on a specific port, then attempts to connect to it based on the host name. So my hosts file has to be correct.I added the nameservers to resolv.conf and now my application will not run. My guess is that the computer is checking the name servers first, timing out then checking the hosts file.Is there a way I can tell the system to check the hosts file first, then DNS. I thought it should behave that way by default, but it does not appear to.
View 1 Replies View RelatedI have some settings within hosts file of my Windows Vista. It helps me to bypass some limitation and get online better. I would like to migrate some settings to openSUSE 11.4.Is there anyone who knows how can I tune my openSUSE?FYI, setting of hosts file is lines of <IP Address> <Spaces OR Tabs> <URL OR Alias>
View 4 Replies View RelatedWhen I converted to OpenSUSE 11.2, and went through YaST HTTP Server Configuration, creating my virtual hosts under the Hosts tab, YaST combinedm all int ile,"/etc/apache2/vhosts.d/ip-based_vhosts.conf".I did google and read, [URL]for further assistance.I'd like each virtual host to have its own file under vhosts.d, and wondering why YaST did not do that.The file /etc/apache2/httpd.conf laid out the file structure, and all vhosts.d/*.conf files are included.Is there a way to tell YaST to create separate files for each vhost, or does the user have to manually do it?
View 5 Replies View RelatedI'm trying to use ssh-keyscan to get some known_host file population going on, but I have a ton of hosts I want to scan, all with multiple aliases in /etc/hosts. Is there a way to use my current /etc/hosts file to do an ssh-keyscan instead of making a special list of hosts that (from what I've read) ssh-keyscan needs?
View 2 Replies View RelatedI have a small office network with windows machines and a Linux Internet access server (CentOS 5.4). For Internet access I use masquerade, so everione can access every Internet service.
I periodicali have quite big traffic from one of the hosts, but I can't figure out which one is that?
Is there any linux command which will show me the bytes/packets (or any useful infos) going to specific hosts?
I Own a netcafe and I want to limit the netspeed for some of the users on the network because some of them maybe use torrent or other ways to eat the bandwidth and the net became so slow for other users.
My task is a way to limit the net speed for some users on the network, I tried a mikrotik RouterOS but it look like a miss to install I wanted an easier way than this, I use linux or windows or any OS to make this task done please help me to do it !!
Probably an easy (which means stoopid) question...I am trying to reroute a website using my hosts file so that it matches my servers certificate file for testing without effect dns and the live site.When I went to edit my /etc/hosts file it is non-existent. I have, I am assuming in it's place, hosts.allow and hosts.deny. Can anyone explain why I do not have a hosts file?
View 1 Replies View RelatedThe facts are as follows:
1. I have at work a regular LAN with many PCs, each with a DNS-registered public IP. Therefore I am able to address each of these PCs by their fully-qualified names and, for instance, initiate ssh sessions to any of these computers just by typing "ssh <name_of_machine>" from a terminal.
2. Within the aforementioned LAN I have just created a private network with some clients, which access the LAN through a router (a D-link DIR-825). We have created this private network for many reasons, but most importantly because we need to guarantee that the hosts in this network will remain networked among them even if the LAN goes down for any reason (which unfortunately happens often). But we still need to have access to the hosts in the private network from the LAN.
3. I am able to define port forwarding rules in the router in order to access certain services on the private network's clients. For example. I am able to access (by ssh) hosts "H1" and "H2" on the private network from a client on the LAN by defining rules for forwarding ports "P1" and "P2" on the router's public IP to TCP port 22 on the private IPs of "H1" and "H2", respectively. Then I would access each of these hosts from the LAN by using:
>ssh -p P1 [ip.address.of.router] (for accessing H1) and >ssh -p P2 [ip.address.of.router] (for accessing H2)
4. The problem with the port forwarding approach is that it is not easily scalable. For instance, If I wanted to enable ssh access to each host in the private network, I would have to define a port forwarding rule for each machine, and then REMEMBER all these port rules when initiating a ssh session from the LAN in order to point to the right host. And the problem gets worse when considering more services in addition to ssh.
5. The ideal solution would be to be have a means for addressing each host in the private network individually, in much the same way in which I address the hosts in the LAN (which have DNS-registered names). For instance, in order to access hosts H1 and H2 as in the previous example, i would like to be able to just type
>ssh [name_of_host_H1] (for accessing H1) and >ssh [name_of_host_H2] (for accessing H2)
The bottom line:
I guess I can say that what I need is some kind of combined DNS-ing and routing that allows me to communicate with the hosts in the private network from outside of it in a transparent way.
The question is: what are any possible solutions for accomplishing this? I have searched the web and found stuff about things like VPNs, reverse-proxies and NAT servers, but I really can't understand if any of these could serve to solve my problem (BTW, isn't my router doing some sort of NAT-ing already? could I just add some DNS-ing in some way?)
I can't seem to get the X server to allow access from clients on other hosts. (I know, not exactly a network problem, but. I made the change in /usr/share/gdm/defaults.conf to be : DisallowTCP=false
and this worked on another CentOS system, but it hasn't fixed it on this one. What other things could prevent other clients from connecting to the X server? From the local host, I get :
Warning: Tried to connect to session manager, Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed although the client DOES actually create the window and work! So, maybe this message is a clue.
From the remote host, I get : Error: Can't open display: 10.10.1.20:0.0 Which is not terribly informative. Is there a log somewhere which details why a connect request was denied? The files in /var/log/gdm are not very informative.
Well, as many proxy applications, GNOME Network Proxy Preferences only allow to ignore hosts. What I want to do is exactly the opposite. I only want to use the proxy for few sites. Is it possible to define only the allowed hosts in any way?
PS: I know FoxyProxy add-on for Firefox does this, but 1)I don't use Firefox and 2)I want the proxy settings system wide not only for browser.
Instructions say "Add hostname for the NIC card into /etc/hosts file" do I touch or mkdir it in?
View 11 Replies View RelatedI am using centOS 5.0. After I change from DHCP to static IP address, I cannot ping hosts on the same subnet. The error message says destination host unreachable. Before I made the changes I was able to ping and now even I change it back to DHCP I still cannot ping with the same destination host unreachable message. The centOS is running on VMware on a Windows host.
ifconfig shows
eth0 Link encap:Ethernet HWaddr 00:0C29:A1:9A:10
inet addr: 192.168.0.202 Bcast:192.168.0.255 Mask: 255.255.255.0
inet6 addr ......
After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows ? (192.168.0.106) at <incomplete> on eth0 I tried different ways by disabling the firewall and and disabling SE protection. No Luck.
I work now with Centos 5.4 and I would like configure my Ethernet, but I can't find the /etc/network/interfaces like in CentOS 5.2.
[root@headnode1 etc]# uname -rmi
2.6.18-164.10.1.el5 i686 i386
[root@headnode1 etc]#
Problem:Your company network has internal only hosts / websites with names that end in .local, e.g.Your freshly installed Ubuntu machine works fine on the network, has internet access, etc. but cannot connect to these particular systems.Testing DNS with tools like dig / nslookup works fine, but normal name resolution with ping / telnet / browsers does not work.Solution:1. Open a terminal window2. Enter the command sudo nano /etc/nsswitch.conf3. Change the following line:hosts: files mdns4_minimal [notfound=RETURN] dns mdns4to this:hosts: files dns4. Press Ctrl-X, Y, Enter to saveExplanation:Ubuntu ships configured to do name lookups for self-configuring networks, based on the AppleTalk / mDNS / Bonjour protocol. In the configuration shipped for the resolver, this protocol is considered the final aurhority for the ".local" top level domain, and DNS will not be checked. The above configuration change eliminates this and restricts lookups to (a) /etc/hosts file, followed by (b) DNS
View 1 Replies View RelatedI often manually add a troublesome domain (e.g., advertisements, fake virus alerts, etc.) to my /etc/hosts file on Ubuntu 10.04 Lucid; but the effect isn't immediate.My hosts file is already fifteen thousand lines long (having combined all the hosts files I could find on the net, including the MVP one); but I still, almost daily, find a new irritant to add to my /etc/hosts file.My problem is I do not understand WHEN the /etc/hosts file is next read after a change.I've been rebooting to make sure the hosts is re-read; but there must be a simpler way.My question:
- WHEN is the /etc/hosts file reconsidered in Ubuntu?
- Is there a way to have the /etc/hosts file re-read sooner?
which file can setup up my network interfaces? i was able to setup the nameserver using /etc/resolv.conf but I cannot find anywhere to configure the ip and and gateway. I could't find /etc/network/interfaces as you do on Debian
View 1 Replies View RelatedI run a local apache server, that has some virtual hosts running. Now I want to be able to locally connect to these virtual hosts, but when I try this, it puts www and .com behind the url and says it can't find it. On Windows I know the equivalent, editing the hosts file. Is there something similar in linux?
View 1 Replies View RelatedOnce you have VLC open, select file, it only lists certain file types. Now if you go down to the bottom you can tell it to use other types (like *.*). How does one set it so one does not have to go down and change the file types every time? So that it shows all file types, all the time, by default.
View 1 Replies View RelatedI have a small pc running fedora 8 with iptables and 2 network cards for routing/firewall and secondary DNS.For some time I've been alerted by the network guys that this machine was generating some alerts. The real network IP address keeps being assigned to the other interface, intended for LAN only (10.0.0.1/24).I've already changed the PC, installed a more recent operating system, replaced the 2 network cards and the problem persists. I have another pc running the same services (except DNS) in a very simillar way and no alert logs from that one.onder if it is some configuration issue on my startup firewall script.I've also installed arpwatch and I could confirm this IP and physical address issue:
Arpwatch output:
hostname: my.host.name
ip address: my.ip.address
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I just installed open Suse 11.3, and I cannot SSH my school. Upon further investigation I could not even ping any machines outside my local area network. Ironically I could nmap machines outside my local area network.
View 4 Replies View RelatedI am on my University network. I am using Network Manager. The default setting is Automatic (DHCP) which, AIUI, means my IP and DNS is set automatically. If I change it to Automatic (DHCP) addresses only then I should be able to set my DNS. However, when I enter the OpenDNS server, although /etc/resolv.conf does change, I connect to my wireless network but have no ability to send / receive any data. Removing these settings and returning to Automatic (DHCP) enables me to send / receive traffic again.
However, I can use a VPN which does change the DNS settings. In Network Manager the setting is Automatic (VPN). My /etc/resolv.conf changes to:
domain my domain.ac.uk
search my.domain.ac.uk
nameserver vpn dns
nameserver vpn dns
nameserver university dns
And I can connect and send / receive as normal.
I can understand that my University has blocked the ability to change the DNS. What I do not understand is how I can change the DNS with a VPN but not manually?
since a few weeks I have a problem connecting to other hosts when I'm using another wireless network, which has a different DNS IP than I have in my network. I have to change /etc/resolv.conf to change the nameserver. Can NetworkManager control the nameserver? If yes, how?
View 3 Replies View RelatedI am running centos 5.3 with the latest bind, i have made some changes in the config and now it wont start.
Fel i named-konfigurationen:/etc/named.conf:27: unexpected end of input (last line)
My named.conf looks like this:
options { directory "/var/named/";
};
view "externt" {
match-clients { any; };
recursion no;
zone "dala.hk" {
type master;
file "dala.hk";
};
zone "0.0.168.192.in-addr.arpa." {
type master;
file "1.0.168.192.in-addr.arpa";
};
};
view "intern" {
match-clients { 192.168.0.0/8;};
zone "intern" {
type master;
file "intern;
};
};
I've setup my server by following a ton of goods, and it seems to work ok, but I need to start using my server for email in order to receive orders placed via my website. I've followed this guide - [URL] I followed the steps above, and tested the mail server via telnet, and all seemed to be ok. I tried sending an email via Squirrelmail, from cs@thinclientwarehouse.co.uk TO my working email simon@c1systems.co.uk, but the server returned with the following message:
<simon@c1systems.co.uk>: host mail.c1systems.co.uk[95.128.128.129] said: 550-Verification failed for <cs@localhost.thinclientwarehouse.co.uk> 550-The mail server could not deliver mail to cs@localhost.thinclientwarehouse.co.uk. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 550 Sender verify failed (in reply to RCPT TO command)
I have a server that is on both a standard network and a virtual network, as follows: server1 attached to standard network server1 acting as Dom0 with two linux DomU guests (under Xen) I only have one network card. How do I configure server1 to have a different hostname on the standard network than on the virtual network? Here are the relevant network configuration files for server1:
/etc/sysconfig/network-scripts/ifcfg-eth0:1
DEVICE=eth0:1
BOOTPROTO=none
NETMASK=255.255.255.0
IPADDR=192.168.122.9
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