Difference between revisions of "Instalation Null Client in Debian"

Latest revision as of 20:12, 9 April 2015

Instalation Null Client in Debian

Sendmail Null Client (Debian)

Installation

aptitude install sendmail

Setting-up

1. Replace ${ADMIN_EMAIL}, ${HOSTNAME}, ${DNS_DOMAIN}, ${IP_ADDR} for the adequate values.

2. Redirect messages from root, postmaster, admin, etc, to the administrator.

Edit /etc/mail/aliases

File: /etc/mail/aliases

<nowiki>
...
operator: root
admin: root
root: ${ADMIN_EMAIL}
...

</nowiki>

Update the aliases database:

/usr/sbin/newaliases

4. Verify that sendmail knows about the different names that the client can have.

Edit /etc/mail/local-host-names

File: /etc/mail/local-host-names

<nowiki>
...
 localhost
 localhost.localdomain
 ${HOSTNAME}
 ${HOSTNAME}.${DNS_DOMAIN}
...

</nowiki>

Verify that the host appears in /etc/hosts

File: /etc/hosts

...
${IP_ADDR}  ${HOSTNAME}.${DNS_DOMAIN}  ${HOSTNAME}
...

Edit /etc/mail/sendmail.mc

File: /etc/mail/sendmail.mc

...
dnl #
dnl # Masquerading options
FEATURE(`always_add_domain')dnl
MASQUERADE_AS(`${HOSTNAME}.${DNS_DOMAIN}')dnl
FEATURE(`allmasquerade')dnl
FEATURE(`masquerade_envelope')dnl
dnl #
dnl # Default Mailer setup
MAILER_DEFINITIONS
MAILER(`local')dnl
MAILER(`smtp')dnl
...

5. Activate the new configuration

yes | sendmailconfig

Security

By default Debian installs sendmail enabled only for localhost.
If tcp-wrappers are used, a line similar to the following should be added to /etc/hosts.allow

File: /etc/hosts.allow

...
sendmail: 127.0.0.1

If different filters are used, it's necessary to allow the access to the port localhost:25/tcp from localhost:1025/tcp

Cleaning-up (optional)

Remove ssmtp

aptitude remove ssmtp

If the DNS setup isn't defined in /etc/network/interfaces, remove resolvconf

aptitude remove resolvconf

@@ Line 1: / Line 1: @@
-Back to [[Mail server]]
+__NOTOC__
-* Cliente Sendmail (Debian)
+<div class="thumbnail img-thumbnail">http://wiki.sc3.uis.edu.co/images/a/a8/Logo_sc33.png</div>
+<p><div class="btn btn-primary"><i class="fa  fa-long-arrow-left"></i> [[Mail server]]</div></p>
-== Instalaci&oacute;n ==
+<div class="col-md-14">
+    <div class="panel panel-darker-white-border">
+        <div class="panel-heading">
+            <h3 class="panel-title">Instalation Null Client in Debian</h3>
+        </div>
+        <div class="panel-body">
+            <p><b>Sendmail Null Client (Debian)</b></p>
+            <p>
- aptitude install sendmail
+== Installation ==
+{{Command|<nowiki>aptitude install sendmail</nowiki>}}
+== Setting-up ==
+. Replace ${ADMIN_EMAIL}, ${HOSTNAME}, ${DNS_DOMAIN}, ${IP_ADDR} for the adequate values.
-== Configuraci&oacute;n ==
+. Redirect messages from root, postmaster, admin, etc, to the administrator.
-''Sustituir ${ADMIN_EMAIL}, ${HOSTNAME}, ${DNS_DOMAIN}, ${IP_ADDR} por los valores
+Edit /etc/mail/aliases
-adecuados''<br>
+{{File|/etc/mail/aliases|<pre><nowiki>
+...
-Redirigir los mensajes de root, postmaster, admin, etc., al administrador del equipo<br>
+operator: root
-Editar /etc/mail/aliases
+admin: root
+root: ${ADMIN_EMAIL}
- (...)
+...
- operator: root
+</pre></nowiki>}}
- admin: root
+Update the aliases database:
- root: ${ADMIN_EMAIL}
+{{Command|<nowiki>/usr/sbin/newaliases</nowiki>}}
+. Verify that sendmail knows about the different names that the client can have.
-Actualizar base de datos de aliases:
- /usr/sbin/newaliases
-Verificar que el sendmail conoce los distintos nombres que puede tener el cliente<br>
-Editar /etc/mail/local-host-names
+Edit /etc/mail/local-host-names
+{{File|/etc/mail/local-host-names|<pre><nowiki>
+...
   localhost
   localhost.localdomain
   ${HOSTNAME}
   ${HOSTNAME}.${DNS_DOMAIN}
+...
+</pre></nowiki>}}
+Verify that the host appears in /etc/hosts
+{{File|/etc/hosts|<pre><nowiki>
+...
+${IP_ADDR}  ${HOSTNAME}.${DNS_DOMAIN}  ${HOSTNAME}
+...</nowiki></pre>}}
+Edit /etc/mail/sendmail.mc
+{{File|/etc/mail/sendmail.mc|<pre><nowiki>
+...
+dnl #
+dnl # Masquerading options
+FEATURE(`always_add_domain')dnl
+MASQUERADE_AS(`${HOSTNAME}.${DNS_DOMAIN}')dnl
+FEATURE(`allmasquerade')dnl
+FEATURE(`masquerade_envelope')dnl
+dnl #
+dnl # Default Mailer setup
+MAILER_DEFINITIONS
+MAILER(`local')dnl
+MAILER(`smtp')dnl
+...</nowiki></pre>}}
+. Activate the new configuration
+{{Command|<nowiki>yes | sendmailconfig</nowiki>}}
+== Security ==
+By default Debian installs sendmail enabled only for localhost.<br>
+If tcp-wrappers are used, a line similar to the following should be added to /etc/hosts.allow
+{{File|/etc/hosts.allow|<pre><nowiki>
+...
+sendmail: 127.0.0.1
+</nowiki></pre>}}
+If different filters are used, it's necessary to allow the access to the port localhost:25/tcp from localhost:1025/tcp
+== Cleaning-up (optional)==
+Remove ssmtp
+{{Command|<nowiki>aptitude remove ssmtp</nowiki>}}
+If the DNS setup isn't defined in /etc/network/interfaces, remove resolvconf
+{{Command|<nowiki>aptitude remove resolvconf</nowiki>}}
-Verificar que el host aparece en /etc/hosts
+            </p>
+        </div>
- ${IP_ADDR}  ${HOSTNAME}.${DNS_DOMAIN}  ${HOSTNAME}
+    </div>
+</div>
-Editar /etc/mail/sendmail.mc
- (...)
- dnl #
- dnl # Masquerading options
- FEATURE(`always_add_domain')dnl
- MASQUERADE_AS(`${HOSTNAME}.${DNS_DOMAIN}')dnl
- FEATURE(`allmasquerade')dnl
- FEATURE(`masquerade_envelope')dnl
- dnl #
- dnl # Default Mailer setup
- MAILER_DEFINITIONS
- MAILER(`local')dnl
- MAILER(`smtp')dnl
-Activar la nueva configuración
- yes | sendmailconfig
-== Seguridad ==
-Por omisi&oacute;n Debian instala sendmail habilitado solo para localhost<br>
-Si se usan tcp-wrappers, se debe agregar una l&iacute;nea similar a la siguiente en
-/etc/hosts.allow
- sendmail: 127.0.0.1
-Si se usan otros filtros se debe permitir el acceso al puerto localhost:25/tcp desde localhost:>1025/tcp
-== Limpieza (opcional)==
-Eliminar el ssmtp
- aptitude remove ssmtp
-Si la configuración DNS no está definida en /etc/network/interfaces, eliminar el resolvconf
- aptitude remove resolvconf