On Sun, May 19, 2013 at 6:21 PM, Klaus Doering <klaus.doering...@gmail.com> wrote: > > On 19/05/13 12:48, Arun Khan wrote: >> >> On Sun, May 19, 2013 at 2:15 PM, Klaus Doering >> <klaus.doering...@gmail.com> wrote: >>> >>> I agree that in a different setting, where there are many users, >>> hundreds of emails per minute and other mission-critical stuff is going >>> on, one needs to design the infrastructure a lot more carefully. >>> >> As a thumb rule, any system providing a service (e.g. email) ought to >> be configured with static IP. With email, you also need a DNS with a >> MX resolving to the hostname/IP number of your email server. >> >>> So, the initial question remains unanswered: what happens to the >>> information provided by the dhcp server as reported in the lease file in >>> /var/lib/dhcp, how is it accessed, and is there a way to make exim4 use >>> it? >>> >> I use postfix, so cannot comment about exim. In postfix, to the best >> of my understanding, there is no provision to get network parameter >> information from dhclient files. I suspect the same is the case with >> exim. >> > Thanks Arun, > > This email server is not directly connected to the 'net, it sits behind > a router. Thus, there is one external IP for which I've registered an "A" > record and an "MX" record on a public DNS server, and then there is an > internal IP server on my LAN. The later one is fixed, but is not defined > in a config file on the server, but is "reserved" in the DHCP server and > assigned to the server. Same for the domain name, which internally > (i.e. on my LAN) is distributed by the DHCP server. In "dnsmasq" this > would be the "domain=" option. And it is this option that is not > acknowledged by exim. >
Whether a server sits on the WAN or an internal LAN (with no visibility on the WAN), the principles of configuration are the same. Instead of public route-able IPs you would be dealing with private IPs. The FQDN is extracted from /etc/hosts entry and hostname from /etc/hostname [a] [a] <http://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_the_domain_name> IMO, you would be better off configuring the system with static ip and FQDN in /etc/hosts. As others have pointed out, this is the standard practice for server setup. Alternately, you could query on the exim mailing list to resolve your requirement. -- Arun Khan Sent from my non-iphone/non-android device -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/cahhm8gaokwkodocucs_f2qwgbwq8c+861eqxucqcx0wh1ti...@mail.gmail.com
