Debian Configuration :: Exim4 With Domain In Local Network
Sep 3, 2015
I'm trying to set up a *simple* MTA in my local network. The only thing it should be able to do is send system / daemon mails to admin@mylocaldomain. but at the moment I'm pretty much overwhelmed by everything i *should* know in order to set up this MTA
my infrastructure:
- servers:
* test01.mylocaldomain --> should send mails (with exim) to admin@mylocaldomain
* dns01.mylocaldomain --> dns-server
* mail.mylocaldomain --> mail-server (postfix / iredmail package)
I configured exim to be in "internet"-mode. now i have a variety of errors I can choose from (and a variety of solutions that i don't like ).. my test is always an email from test01.mylocaldomain:
echo "Hello World" | mail -s Testmail admin@mylocaldomain
- after running the config, i get the error: admin@mylocaldomain: all relevant MX records point to non-existent hosts --> google says, edit and udpate update-exim4.conf.conf --> dc_relay_domains='mylocaldomain' --> but this exim installation should not be a relay at all. it should only be able to SEND (to this domain), not deliver it. or do i get something wrong?
- after i added dc_relay_domains='mylocaldomain', i get --> SMTP error from remote mail server after RCPT TO:<admin@mylocaldomain>: host mail.mylocaldomain [192.168.x.x]: 550 5.1.1 <root@mylocaldomain>: Sender address rejected: User unknown in virtual mailbox table --> but i don't want to create an account on the mailserver for the SENDER...
- ...so i thought, i'd config exim with the domain "test01.mylocaldomain" (including the server name), so that the sender is clearly from another domain than the mail server handles (e.g. user@test01.mylocaldomain).. but then i get this --> SMTP error from remote mail server after RCPT TO:<admin@mylocaldomain>: host mail.mylocaldomain [192.168.x.x]: 450 4.1.8 <root@test01.mylocaldomain>: Sender address rejected: Domain not found
I really just wanna send mails in my local network.
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Jun 17, 2010
I am working on a Debian 2.6.26-19 Distribution with exim4 as MTA. After a system restart a problem occurred with delivering emails to local addresses. These local addresses use a 1and1 mailserver for email. The MX records for the local domain are set correctly but exim does not use a DNS lookup for these addresses because it identifies them as local addresses. I figured this out by executing the exim4 -d -bt command. The dns lookup part of the result looks like this (I replaced the actual address with placeholders):
[Code]....
The eventual result of the exim4 -d -bt command is: [user]@[domain.ext] is undeliverable: Unrouteable address How can I make sure, that exim4 makes a DNS lookup for the local addresses instead of skipping it? I know that I have to edit a exim4 configuration file, but I could not figure out which and how.
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Mar 10, 2011
Backround:
I'll have 2 routers:
- ADSL-router (D-link DSL-2640U)
+ NAT on (needed as one static IP from ISP)
+ Server's IP as 192.168.X.xxx
+ router firewall port-forwards set for needed ports (21,22, 80 etc) to 192.168.0.xxx - 2nd LAN-router
[Code]....
Is there any setting/file on Debian-user-machine, where I could fix that abc.mydomainXYZ.com/defg is always in something to do with 192.168.X.xxx
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Aug 27, 2010
Linux [URL] 2.6.26-2-686 #1 SMP Wed Feb 10 08:59:21 UTC 2010 i686 GNU/Linux Currently I have exim4 configured to use my mail server as a relay to send php emails. Though I don�t think I want this setup. My goal is to be able to track emails sent out to make sure that nothing happened and they got bounced back. I need to be able to find the emails that are bounced.
If I configure exim4 to send emails from the current (apache2 / php) server any emails that bounce will end up there, correct? We have clients that are expecting emails and are complaining they do not always get them so something is not 100% configured correctly. I am going to re-run #dpkg-reconfigure exim4-config
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Jul 9, 2015
I've installed it properly until it works now, it does send emails and receive them, but heres the problem.
1) it does not send emails to a certain domain, unless i do dpkg-reconfigure on exim4 and put the domain on allowed relay... can't i just put something on settings which allow to send emails to ALL domains?
2) EVERYONE can connect to the server by telnet from any position, terminal or pc, and just use an existing user to send emails to anyone.... example, i have testuser123 setted up in debian/exim4 .. then they simply write "mail from:testuser123@host.dot" and the server accepts it.. without even request an authentication for that. And this is a problem, because everyone can use my email addresses to send emails to whoever.. heaven for spammers/hackers..
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Dec 24, 2010
Two nights ago I decided to switch from testing to unstable. Since then I am able to connect to the internet, but not to anything on my local network. I am unable to ping this computer from another one on the network. This computer is connected through wireless. I thought that something might have changed with iptables that was blockinghe localnetwork. I tried to "flush the iptables settings with "iptables -F". Since that didn't work I uninstalled iptables (which didn't work and I reinstalled iptables). In my browser I tried to connect to my router and that doesn't work either.I connect to this computer daily through ssh and connect to a NAS. Without ssh and my NAS I feel kinda lost
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Jan 21, 2011
My debian server has been attacked due to a security breach in exim4 4.69-9 (probably applies to loads of other versions too). The security breach allows the attacker to get root access by creating a buffer overflow in a header which then can be used to inject code.
[URL]
The securtiy breach is fixed with 4.69-9+lenny1 I want to share my actions with you on what I did to (hopefully) get rid of it. However at the time of writing this, the above website is down due to too much load (DDOS Attack?). How you can check if you've been attacked:
The attack creates a buffer overflow in exim4, which results in paniclog entries.
$ cat /var/log/exim4/paniclog
2010-12-17 07:34:11 string too large in xxxyyy()
2010-12-19 10:42:10 string too large in xxxyyy()
this would be an example of two attacks. One on 2010-12-17 and the other two days later 2010-12-19.with this information you can start find potentially infected files. There may be a better way, but I searched for them with this command:
$ find / -mtime 31 2>/dev/null # files,directories,links created 31 days ago (i.e. 2010-12-17)
My infected files:
/usr/bin/uptime
/usr/bin/pwdx
/usr/bin/slabtop
[code]....
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Feb 11, 2016
I will see ipcam in my local network from my tablets. I'm install server/client but I can't even ping my Ipcam from my tablet.I'm ping my ipcam from my server
Code: Select allping 10.42.0.22
PING 10.42.0.22 (10.42.0.22) 56(84) bytes of data.
64 bytes from 10.42.0.22: icmp_seq=1 ttl=64 time=0.639 ms
eth1:1 Link encap:Ethernet HWaddr 00:25:22:1c:6e:05
inet addr:10.42.0.1 Bcast:10.42.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.42.0.1 P-t-P:10.42.0.2 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:1775 errors:0 dropped:0 overruns:0 frame:0
[code]...
my tablet can receive ip, can see ftp on server but can't see anything in my home network.
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Apr 21, 2010
I have a new Debian 5.04/ppc install on a G5 tower and it's not able to browse the local network. The clean install could see the network, then I installed the Samba server, and it hasn't worked since. Samba server never really worked, and I'm guessing I messed something up. I've reinstalled network-manager, and removed / reinstalled samba.
I have a small home network (6 machines) running wired and/or wireless, pc/mac and linux.This machine can PING other machines by name and IP address.This machine can PING itself by name and IP address
Other machines can PING this machine by IP address only, not by name.Nautilus network browser only shows the "Windows Network" icon, which, when clicked, shows an empty window.I've got networking up fine on all my other machines but this one is stumping me.
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Jul 25, 2010
I have three Debian systems running, along with several XP laptops, PS3 and two DirecTV systems. I use two of the three Debian systems as media servers, and the third is an older system mostly for playing around with. My home network is running fine with the following nuisance. The two newer Debian (Lenny) systems are <barney> and <mitzi>, the older is named <oscar>, running Debian Sarge 3.1. From either locally or remote login to <barney> and <mitzi> I can ssh into either of the other two systems, however when logged into <oscar> I cannot ssh by name to either of the other systems. e.g. ssh: mitzi: Temporary failure in name resolution..However, from <oscar> I can ping outside my network (e.g. ping www.google.com) with no problems.I can also ssh to the other systems via IP address, just not by name.
I've compared the /etc/ssh/ssh_config, /etc/resolv.conf, /etc/ssh/sshd_config and other files between the two systems and not seeing anything peculiar. arp, route, etc., don't show different behavior between the systems either.
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Sep 15, 2010
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[Code]...
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Feb 15, 2011
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TL;DR: need for my domain to be accessible from both my local network and the outside world, now it's only from the outside which is a problem.
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Feb 20, 2010
My ISP recently decided to kill outbound traffic on port 25 for some reason. Therefore, I change the SMTP port to 24, everything work fine so far i can send email to local domain and remote. However, i cannot receive Emails from remote domain. i try use online "mail server test services" and all i got is timeout.
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Aug 22, 2011
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Apr 2, 2010
(Desktop with Debian sid) How do I configure Exim4 to send local mail locally and other mail through my ISP? I just did dpkg-reconfigure exim4-config and none of the choices seemed to give me the answer. I have a lot of frozen email addressed to:
root@<My_ISP_SMTP_URL>. I also don't know what happens to regular email sent from Mutt. I have no problem sending email through my laptop on the same LAN.
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Jun 9, 2010
I've recently had to rebuild our mail server - after the old one over heated - and I've realised I never backed up the config files for exim... so now tyring to work out how the hell to configure what I had....
The setup isn't the most straight forward, so I'll try and explain what happens...
- all emails @longdomain.com are received by an hosted server on the internet
- they are then forwarded to @shortdomain.com, the IP for which is our internet connection which fowards port 25 traffic to the exim server
- the exim server then spam and virus checks the emails and forwards them to an exchange server (sorry but it works well for us)....
I've installed exim4/spamassassin/clamav successfully, and it's setup to receive emails for the relevant domains and relay from the hosted server on the internet (and some local addresses).
how I then setup exim4 to foward all emails on the relevant domains to the exchange server?
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Jun 22, 2009
I am currently working on a project related to packet sniffing which has been implemented using the concept of raw sockets. I am using C language.I am able to decode the following details from the packets received from a local network,like:
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source and Destination IP Address
source and Destination port no
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source IP Address from which user had logged on
domain name
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When installing these progs on Lucid it comes with exim4,I noticed this in the terminal output. What has exim4 to do with rkhunter and/or chkrootkit?
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Apr 28, 2011
I want configuration a DNS server for my area! What DNS server software is better than other software?
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Feb 18, 2010
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Oct 13, 2010
I'm having problems when trying to view my web site from inside my firewall and router. The web server works fine and will resolve from IP address on the local network and port forwarding works for external connections. The problem stems from when I orignally setup the server; I left the domain name field blank when going through the installation process.
I've had a look at the man pages and had a search on Google but cannot find an answer that works. I've changed a few things in '/etc/hosts' and '/etc/networks' but when I make changes they have no effect on the problem. My web site is on a no-ip domain which is [URL]..
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Sep 30, 2010
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RewriteMap lowercase int:tolower
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RewriteRule ^(([^./]+.)?site1.com)/(.*) /www/site1.com/www/root/$3 [L]
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[Code]...
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Jun 28, 2009
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Jan 28, 2009
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And the Government network are 10.0.0.0/8
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Feb 18, 2010
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May 28, 2010
On my computer (running debian lenny), the network is configured this way (this is a minimal example):/etc/resolv.conf:search bar
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Sep 18, 2015
The first filter does not work, the second does...why?
Code: Select allelsif allof (
body :contains ["some text", "Some Text"],
address :domain :is "From" "amazon.de"
)
{
redirect "someemail@gmx.net";
}
elsif allof (
body :contains ["some text", "Some Text"],
address :domain :is "From" "yellowstone.bohlsen.lan"
)
{
redirect "someemail@gmx.net";
}
I even saved the amazon.de email from thunderbird as .eml and used it as a testmail to check the second filter
Code: Select allcat /tmp/amazon-main | mail mylocalusername@yellowstone.bohlsen.lan
that worked without problems.
the amazon email address that is sending me mails is:
Code: Select allbestellbestaetigung@amazon.de
#hostname -f
yellowstone.bohlsen.lan
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Feb 6, 2009
I installed debian etch, it runs and does connect to the internet fine through a linksys router...the linksys router is connected to my cable modem...now..
I just registered for a domain name (ex. mydomainname.org) with Verio....this is where I am stuck.
I installed apache 2, a web server, file server (all seem to work) I need to know what files I need to configure to have my machine actually BE that domain name.
Ex. my linksys DHCP IP addresses, the linksys gets an IP from the cable modem...my yquestion is ONCE I register a domain name with verio...how do I configure my end so it "knows" I am that respective domain name...I think I need to configure the following, but knot sure how to do it: resolv.conf, hosts, and interface?
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