General :: Dnsmasq Without Altering /etc/hosts File Manually?
Jul 19, 2011
I've trying to get dnsmasq working as a combined dns and dhcp server. It's infuriating so far... In short, the DNS works fine for anything added to /etc/hosts, and the dhcp works fine, but the dhcp is not updating the dns with hostname information from clients.
The outcome of this is that i can only ping a node by hostname if i know it's address, which means setting a static dhcp allocation and putting the hostname into /etc/hosts manually, which is very annoying and kind of defeats the poit of dhcp. There must be a way to get dnsmasq to update the hosts file, surely The clients aren't using fqdn's if that matters, and i think i've tried every combinination of "expand-hosts" and "domain=" following is the dnsmasq config file contents:
My upstream DNS server is a bit slow, so I've installed the dnsmasq cacher locally. I have the service starting on runlevels 2, 3, and 5. But I can tell by Firefox's behavior that dnsmasq does not work upon boot. Firefox lets its own DNS cache expire after 60 seconds. When I do my second Google search five minutes after my first, the second DNS lookup for www.google.com is just as slow as the first.If I manually restart the dnsmasq service, I get the fast name resolutions I expect.
I have set up a home network using a modem/router, which my devices connect to via ethernet and wireless. I have got it working but i'm still not happy (stick with me...)!
I have settings configured so as to utilise DHCP, so IP addresses for the different machines are automatically assigned by the modem/router (as i understand it). I then obtained these auto-assigned IPs by running ifconfig on each device. I tested connections between the devices by pinging each other using these IPs (ie ping 192.168.2.2).
BUT I want to be able to use hostnames (ie ping dandelion) instead, and the only way I can make this work is to add hosts and corresponding IPs into the /etc/hosts file.
I have made it work in this way, but doesn't this method defeat the idea of DHCP, as I will now presumably have to manually maintain the /etc/hosts files on each device.
I'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?
I am running dnsmasq in debian lenny, wvdial connecting but dnsmasq doesn't work, the /var/run/dnsmasq/resolv.conf file is empty this is /var/log/syslog:
The /etc/resolv.conf and /etc/resolvconf/run/resolv.conf is ok:
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?
ubuntu: 10.04dnsmasq: 2.52-1ubuntu0.1I've installed dnsmasq and it is performing DNS duties correctly. I'd like to limit access to the dnsmasq service to a specific address or interface. I've tried adding variations and combinations of the following to /etc/dnsmasq.conf:
I would like to lock the /etc/hosts file somehow in a way that only someone else can unlock it, possibly using a lock code.I would then give the passcode to someone else.I'm running Ubuntu 10.10.
I 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)?
I did a yum update this morning that included a dnsmasq update. Subsequently, for an unrelated reason, I restarted dnsmasq, but it failed because /etc/dnsmasq.d didn't exist. It looks like my /etc/dnsmasq.conf file now includes "conf-dir=/etc/dnsmasq.d" at the end. Since dnsmasq was starting and I didn't remove dnsmasq.d, I assume this line was added by the update. Commenting the line resolves the issue.
An alternative hypothesis, given that I don't really know what the state of /etc/dnsmasq.conf and /etc/dnsmasq.d/ was before the update, might be that the directory did exist, but was removed by the update. I find this the least likely of my 2 stated hypotheses. (There are other hypotheses, but I think they are even less likely). Am I correct is concluding the conf-dir line was added by the update? If so, shouldn't the updated RPM create the directory during install?
Working fine: ==> scp my_log-bin.01393[0-9] root@192.168.103.66:/backup/ error - No such file or directory: ==> scp my_log-bin.0139[30-99] root@192.168.103.66:/backup/
I want to simply mount an ext4 file-system onto a normal mount point in Ubuntu (/media/whereever), as read-writable for the current logged-in user, i.e. me.
I don't want to add anything into /etc/fstab, I just want to do it now, manually. I need super-user privileges to mount a device, but then only root can read-write that mount. I've tried various of the mount options, added it into fstab, but with no luck.
GUys im trying to setup a linux router w/in our network here in school, and i was using a fc13 as my linux router, i already setup iptables for linux masquerading.. i have a 20 winxp client connected to the said router with an ip of 192.168.0.1, on each client i manually configured all of the clients ip address.. i was wondering if i could use a dhcp server to ease the manual configuration.., i already installed a dhcp server. Note im a newbie, thus dhcp server will also provide dns resolution to winxp clients??,, on some thread that i read if the client is linux.. you will just need to add nameserver to the /etc/resolv.conf for each linux clients.. the clients that im using here is winxp, i was wondering if i could setup the server to distribute dns & also a dynamic ip to all the clients..w/c 1 is better?? DCHP server or dnsmasq??
It says that this is a bad option dchp-range=ignore,192.168.1.99,192.168.1.99 I am very new to linux but it says that's a bad option to why my dnsmasq service isn't running.
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.
Is there a way of altering the time between password requests. For example after I login there seems to be a certain amount of time before the screen blanks out and a new request for the user password is asked. I would like to increase the time substantially.
Having recently installed Ubuntu 10.10, I'm currently looking around for different programs. However, it's already getting on my nerves that I have to type my password every time I want to install something. Where and how do I disable this? I already set myself as admin in the user settings but that doesn't seem to work.
This goes for things like changing system settings too, it's really annoying.
I share a computer with my brother. It runs Lucid Lynx. I want to add an entry to the hosts file that will affect him negatively. Is there a way I can add the entry, without it affecting him, like, is there a user-specific hosts file?
I have 10.04.1 on my server with a 250gb sata drive. I have all my files on this hard drive. I'm running out of space so I have another 250gb sata drive I need installed. I want to create raid 0 so I can expand my servers hard drive space. I don't want to lose my data on original hard drive or reinstall to create the raid. Is there a way to achieve this with mdadm without altering the first hard drives data?
Is there a command I can implement into a script that I am working on to change the maximization state of a window (maximize/restore)? I know there is a keyboard shortcut (Alt + F10), and I'm not interested in doing that.
We are running SLES 11 where an iscsi tape library is attached. To load the tape in a slot we are using for instance the command #mtx -f /dev/sg1 load 2 which is doing very well. But after a server's reboot the device name of the loader is now /dev/sg4 or /dev/sg5 I mean it is dynamic. Is there any way to have a fixed device name for all times?
I am trying to add subdomains on ubuntu 9.10 desktop edition and and I am not sure whether I need to add some info.(such as 127.0.0.1 sub1.example.com and so on) to the /etc/hosts file like the windows' windows/system32/drivers/etc/hosts file. I used to use the wamp-server(on Windows 7), I needed to edit 3 files, httpd.conf, httpd-vhosts.conf and hosts. And almost every edit is made in the httpd-vhosts.conf file on wamp-serveriles should be edited? or what else should be done that I didn't mention?
tell me a way to password protect the HOSTS file in ubuntu so that when i block certain websites the other person cannot unblock them. IMP: i donot want the HOSTS file to be protected by 'root' password as the other person knows it.
I run a few virtual servers at home behind a NAT, including an e-mail server, with dynamically updated dns records pointing to each of the servers. Consequently, I suffer from the loopback problem when working with these servers from my desktop PC. (E.g., I ping one of the dns hostnames and the ping goes to my router instead of the server). I fixed this problem by manually adding the in-home IP addresses and name pairs to my /etc/hosts, and then setting /etc/host.conf to a "hosts, bind" order.
This seems to work for every application on my desktop except for one: the postfix installation on my desktop PC (used for mailing smartctl messages and so forth) cannot communicate with my in-home e-mail server (times out). I checked the logs, and it looks like it is trying to use the IP address from the actual A-RECORD, rather than the address in my hosts file.
So I'm not quite sure what to do. There seems to be a "proxy_interfaces" parameter in main.conf which might be relevant, but I think it only deals with received mail. I'd prefer to have the mail going to that e-mail server, rather than also having to check the spool on my local desktop accounts.
I'm new here and hope to profit from your immense linux knowledge and of course to share my own experience where I can.
I'm in a student organization and we use a file server that runs linux. I can log in through ssh and copy using scp using login and password (no rsa/dsa keys because most users are windows users using winSCP and they're lacking in computer knowledge so we don't require them to mess around with keys)
However, I don't have network access everywhere, so I'd like to make a copy on my laptop harddisk of some of the folders I use most frequently. Note that I don't need it to copy files from my pc back to the remote server so I don't need two-way sync. Deleting the local copy every time and downloading a new full copy is not an option as we are talking about several gigabytes and the download speed is limited. Normally I would use Unison, however, this requires unison to be installed on both pc's and I can't install any software on the file server so this is not an option.
Any ideas on how to achieve this? I'm reasonable knowledgable about linux so I don't mind tinkering with some config files and using command line applications.
