Networking :: DNS Installation And Configuration: A To Z / Register The Name Servers / Resolve Different Domains?
Apr 9, 2010
Anyone can point me to a document, page, or something that will tell me exactly how to implement DNS step by step. I don't mean just the concept, i.e. you'll need two name servers, and to download BIND, etc. NO, I mean command line commands and all. Step 1, step 2, how to register the name servers, how to resolve different domains, etc.
I'd really appreciate it, as I need to implement internal DNS and external DNS for my company soon. Our set up is pretty standard: Firewall, DMZ, Solaris/Linux/Windows servers, and Windows clients, etc.
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Nov 29, 2010
I'm finding that I can not resolve .local domains anywhere except with nslookup and found on the LucidLynx release notes that there is a problem with avahi causing this. Although the avahi service is convenient for locating printers and such can anyone else tell me what other services/options will be impacted on a default installation of Ubuntu if I disable this service?
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Nov 5, 2010
Let me start off by saying I am experienced with computers, though my knowledge of Linux and networking is limited. I've just recently started setting up a Ubuntu 10.04 server to be a SMTP server. I've followed this guide by the letter: [URL] What I've attempted, to test the server, is the following:
telnet localhost 25
ehlo localhost
(this returns all the desired information) I then do a MAIL FROM my domain which is accepted, and try to do a RCPT TO an external mail server (gmail) to test sending an email. I am then told 'Relay Access Denied'. I'm sure that there's something fundamental that I'm either not understanding or not doing correctly. I simply want an SMTP server that can send to other domains. What do I need to do?
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Aug 29, 2010
I am using FC13 with BIND. I have a slave zone setup for my work domain. I can resolve .local FQDNs from the shell using NSLOOKUP but any .local FQDN from an application (GUI or CLI) results in "ping: unknown host". All other domains resolve fine. My guess is there is something with BIND that sees .local as an invalid domain suffix. Is there an option that I need to set/modify to force the resolution of .local entries?
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Nov 21, 2010
I am trying to understand working of pci_resource_start function So I browsed code via cscope and searched for string pci_resource_start and got following in pci.h
Code:
#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
I am not able to understand how does this above macro works. How does it above macro gets appropriate base address register in configuration space?
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Oct 2, 2010
I just installed Debian with the latest testing iso, and I'm having problems connecting to the web via browser. I can ping hostnames (i.e. google.com, debian.org, etc.) from the terminal and it resolves just fine, but if I try to load a page from Iceweasel or Epiphany it says the page won't load because it can't resolve the hostname. Can someone tell me what I'm missing?the detail that I'm running amd64. I've checked iptables and found no entries, and for good measure I flushed it to be certain. I also checked resolv.conf but that looked normal, just a nameserver entry pointing to my home router. I'm new to Debian, but have used Linux for years, and I'm genuinely stumped. I'm sure the solution will smack me in the head for its simplicity, but nonetheless I need at least a shove in the right direction.
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Oct 20, 2010
I try to fix bugs on my web server. The remote web server allows redirects to arbitrary domains. Description : The remote web server is configured to redirect users using a HTTP 302, 303 or 307 response. However, the server can redirect to a domain that includes components included in the original request. A remote attacker could exploit this by crafting a URL which appears to resolve to the remote server, but redirects to a malicious location.
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Jul 29, 2011
My organization is running a VMware vSphere based platform. On top of that we have a Sun Gridengine cluster consists of a number of ubuntu VMs.At the moment, we deploy new cluster nodes from the VM template. Although it already saves us lots of time, we still need to configure the network, host name, register DNS record manually.In a near future, we will need to add 100+ more hosts to the cluster. So we are seeking a automated deployment so that a VM does the following during its first boot:
1)configure the network for the correct IP with DHCP or manual.
2)request a designate host name (maybe from a pre-defined datasource?) and configure host name.
3)register itself to our DNS servers.
We don't really have experiences for running big cluster. So welcome to share your opinions and experiences.Specially I'd very keen to find out if there is any well-proven solution right there or I will need to implement from the scratch.
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Jan 11, 2010
To start off, I realize this type of question is very hard to answer and there is no general rule. My intention is to merely get an understanding of what others are doing. Models: 1) small piece of a big pie, but many small pieces 2) big piece of the pie, but few pieces. Which model do you guys do? If one can make $100 from a site which little or know effert, why not create 100 sites like it? Benits: diversified with multiple revenue streams, hard to manage so many etc etc. OR Work hard on 1 site, focus, narrow the niche and make loads of profits. drawbacks: all eggs in 1 basket Which model do you guys employ?
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Jan 29, 2010
I've built a web hosting server with ubuntu 9.10 desktop edition at home and it's up and running.how to get and set subdomains. What I mean is that I have a purchased domain [URL] and I want to add as many sub domains as I want such as [URL] so on. And more importantly every single subdomain must belong to each account.
sub domain account name
-------------------------------------------
sub1.example.com john
sub2.example.com steave
sub3.example.com myname
In this case, there are three accounts for ubuntu and each account has a permission to the corresponding sub domain only. p.s My DNS is managed by my domain company and it provides a web page where I can forward(not sure, but there are fields that I can type my sub domains) subdomains and my external IP addresss up to 20(just in case this info matters).
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Mar 12, 2010
I've tried to set up an old laptop with Ubuntu server - need to use it as a web server for a group of students on a local network only. I managed to get it working fine for just one user publishing webpages etc to a folder called VAR/WWW I could FTP files into the folder and access them again via FTP or a browser. I then decided to create some subaccounts (one for each student) I did this by typnig the following commands:
Sudo usermod -g www-data student1
Sudo chown -R www-data:www-data /var/www/student1
Sudo chmod -R 775 /var/www/student1
(In this example student1 is intended to be a subfolder of www and act like a sub-domain with write authority- at least that was my intention) Problem I then get is that if I use Filezilla to access each account I cannot see where to publish the files - wherevever I place them they are not accessible from the browser. Do any of you experts out there know the answer to my problems please.
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Jul 19, 2011
i've bought a vps server with 2 ip. I also bought 2 domains "eventlog.it" and I want associate them to my vps How can i do?
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Aug 4, 2010
I have Postfix + Unix Accounts + Virtual Domains. I have a bunch of domains hosted on my machine, let's call them [URL] [URL] and [URL]... etc Until know, domain2.com, domain3.com were mapped in virtual domains to [URL] So this is how /etc/postfix/virtual looks like:
[URL]
Like I said, all mail accounts are unix accounts, so, if for example I have the user "paul" this user will receive e-mail for ALL DOMAINS. [URL]But as it turns out, I now need a COMPLETELY ISOLATED domain... let's call it [URL]. So If I create a new user, let's call it "steve" I want steve to receive e-mail ONLY on [URL] and not on all others.
I would have to redo the whole thing from the beginning. I'd have to comment out the $mydestination parameter in the main.cf file and start using only virtual domains. So if I have the following users: paul, steve, sally, megan, jenny and I want paul and steve to ONLY receive mail for domain1.com, sally and megan to receive mail for domain2.com and jenny to receive mail for domainX.com, my /etc/postfix/virtual file would have to look like this:
[URL]
I'd have to create the unix account and then start modifying the /etc/postfix/virtual file.
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Jun 21, 2010
I would like to set up an ubuntu server to forward outside requests directed to different domains to different computers on my local network. The bind is I only have ONE public IP.
Here's an example of what I want to do.
- if a request is sent to www.first-domain.com, I want to forward it to a local server (say 192.168.0.10)
- if a request is sent to www.second-domain.com, I want to forward it to a local server (say 192.168.0.20)
and so on...
I will need to forward these requests not only for web sites but for other services such as SSH, mail, RDP, VNC, etc etc PS Once it hits those local servers, I know how to use iptables to forward them as desired.
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Aug 3, 2011
I followed this tutorial: [URL] But the links i created are not accessible. Is it to do with [URL] not working? I was doing [URL] and [URL], but didnt work
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Apr 23, 2010
I have several web servers running apache on my LAN. Each internal server hosts a number of domains.I would like to make these available to the internet and make sure they all get to use port 80 and 443.My idea was to put Apache on the firewall and have all http(s) traffic from the Internet to my firewall be redirected by Apache to the different internal apache servers. This, in theory, would allow me to keep the standard http(s) port.
Can this be done? I was thinking of mod_rewrite and mod_redirect but in all honesty, I'm a little at a loss on where to start.Can someone point me to relevant documentation or give me the basic idea on how to start?
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Feb 18, 2009
WTF am I doing wrong with sendmail? I am trying to reverse alias a user as follows:
USER1 USER@MYDOMAIN.COM
USER1@hshlnb.hsh.com USER@MYDOMAIN.COM
That is how I have the entry in the genericstableWhen he sends mail, it comes from USER1@MYDOMAIN.COM, so I have the domain rewrite correct. The forward mapping in virtusertable works fine as well - he gets all mail redirected to the user1 account as specified.My sendmail.mc file has this:
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
[code]....
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Jan 9, 2010
I've set up a mail server using Postfix + dovecot. It works just fine sending email to users in my domain. However, I can't send email to external domains (like gmail, yahoo, etc) different than mine. I've tried sending from a remote connection using Evolution and I get the following message on mail.log
Jan 8 10:45:20 mail postfix/smtpd[14911]: connect from unknown[]
Jan 8 10:45:21 mail postfix/smtpd[14911]: NOQUEUE: reject: RCPT from unknown[]: 550 5.1.1 <lobomacz@gmail.com>: Recipient address rejected: User unknown in local recipient table; from=<user@mydomain.com> to=<lobomacz@gmail.com> proto=ESMTP helo=<[10.24.4.230]>
[Code].....
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Jan 16, 2010
I'm having a problem with a new install of postfix... it won't relay mail to external domains. Internal mail is fine.I'm using virtual_mailbox_domains so that I can have multiple domains, and I've set dovecot to use local files with encrypted passwords.Here's my main.cf
Code:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
[code]....
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Apr 6, 2010
how can i configure my server to send mails from about ten different domains i use google apps and want to know if its possible. Because it sends mail but all goes to spam and i have a static ip
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Aug 5, 2010
I have a domain.com site up and running on my server. I just bought domain.net, domain.org and I would like it to point to the same site on domain.com. I am not sure how to go about doing this.I used zoneedit for my dns. So far I have pointed my 2 new domains to the same dns as my .com on zoneedit and I have created (A) ip address for them. If I did this correctly, the new domains are pointing to my server and all is left is to edit the virtualhost?
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Oct 7, 2010
My email server (Postfix + Courier + virtual dropboxes) can receive internal emails, but if the email is sent from the exterior (like Gmail or Hotmail) this email is returned to the 3?rovider (like Gmail):Delivery to the following recipient failed permanently:xxxx@xxxxxxx.xxxTechnical details of permanent failure:Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 sorry, no mailbox here by that name (#5.1.1) (state 14).
----- Original message -----MIME-Version: 1.0I've tried a lot of things, I've used this guide:http://flurdy.com/docs/postfix/My Ubuntu Server is 10.4 (Lucid), I had the same configuration with a previous Ubuntu version and everything was right.
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Apr 2, 2011
I'm following how to instruction by [url] I cannot get sites working.
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Apr 17, 2011
I work for a college with many departments. I'd like to just deploy one LDAP/krb5 server (plus slave replicas) to authenticate all users in all departmentsIs it possible to do this?The proposed DNs for the departments matches what is done for NIS now.If anyone has any pointers or URLs that describe how to properly do this.
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Jun 15, 2011
When I use sendmail (or, most commonly, a PHP or Perl script uses it) to send to any other domain except my own, it works great. When I use it to send to my own domain, however, it's trying to deliver it to localhost. Problem is, all our mail is handled by an Exchange server on a different machine, so I really don't want If I run sendmail manually for a test message to myself, here's how it comes up after the message is closed out:
Code:
echo "Subject: test" | /usr/sbin/sendmail -v me@domain.com
354 Enter mail, end with "." on a line by itself
>>> .
050 <me@domain.com>... Connecting to local...
[code]...
The message then gets dropped into my box at /var/mail/xxxx, but that's really not helpful to me -- I need to to connect to that other machine to deliver the mail there. This machine isn't used as a mail server at all. Also, if it's trying to send to a username that doesn't have an account on this server (we have many), it just fails entirely with "user unknown" (that makes sense, as there are only a couple of user accounts on the web server). how to get sendmail to connect to our mail server instead of "local"?
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Sep 1, 2011
I am going to try and replace our crappy Windows/imail server with a new ubuntu 10.04 LTS based machine. It will end up with about 400 domains on it with around 3000 users total. 96% of the domains have very light use. 4% of the domains have heavy use but do not send any bulk mail.
Can someone here recommend a mail server software package that would be easy to administrate and easy to backup/replicate? All we need is POP with webmail. We do not need IMAP or want any group/collaborative functions.
What do you usually use for anti-spam on a linux mail server? We want to keep it all open source if possible.
For hardware we are looking at an HP DL360 G5 with dual Xeons, 4G of ram, and the P400 controller with 6 SAS 15k drives. Do you think a server like this will be able to handle the mail on linux? Volume is around 400k messages a day inbound with about 10% being legit/90% being spam. The server will be dedicated to mail hosting and will not host websites.
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Dec 29, 2010
I'm in the process of starting a migration from an old postfix server to nice shiney new exim server however there are a few things i'm really not clear on and i'm hoping that some one here could point me in the correct direction. Okay the postfix server at the moment does the follwoing ( i'll try and keep this simple ):
* accepts incoming mail for users on multiple domains and puts the mail in the users mailbox ( external -> internal )
*accepts mail from users on multiple domains to pass on to the outside world ( internal -> external )
Obviously the POP and Imap functions are handled by other daemons.. I'd like to replicate this sort of setup on the new exim box, however the guides i can find only help with configuring the exim system for incoming mails ( external -> internal ) for multiple domains and i cant seem to find a guide that would indicate how to do both ( internal -> external and external -> internal ) on one box. I'm guessing i may have to do some sort of auth to get exim to accept and then handle the internal -> external side of things?
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Apr 16, 2010
setting up DKIM AND POSTFIX FOR UBUNTU 9.10 WITH VIRUAL DOMAINS
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Jul 1, 2010
I recently purchased a GoDaddy domain with the intent of hosting a website myself at home on a box First of all, I don't have a static IP, so I set up dyndns with my router. Do I want to just have GoDaddy forward traffic to my dyndns account? Or do I manually change the nameservers? To what? Also, this seems to work for http(s) traffic only. What happens if I want to use ssh/ftp/smtp? And do I need to configure anything on my end aside from installing/configuring the appropriate server binaries? Is there a way to update GoDaddy when my ip changes?
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Jul 4, 2010
Im moving all my websites on a dedicated box. I had a cpanel hosting account, and now moving to a terminal and ssh system.I need some advice on choosing my mail setup. I need POP, SMTP, with multiple domains, as host for a few clients.I would like the most simple version.The server will only send +- 100 mails / day.I currently running Ubuntu Linux 10.04.
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