Difference between revisions of "Instalation Null Client in Debian"

From Supercomputación y Cálculo Científico UIS
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{{Command|<nowiki>aptitude install sendmail</nowiki>}}
 
{{Command|<nowiki>aptitude install sendmail</nowiki>}}
 
== Setting-up ==
 
== Setting-up ==
Replace ${ADMIN_EMAIL}, ${HOSTNAME}, ${DNS_DOMAIN}, ${IP_ADDR} for the adequate values.
+
1. Replace ${ADMIN_EMAIL}, ${HOSTNAME}, ${DNS_DOMAIN}, ${IP_ADDR} for the adequate values.
  
Redirect messages from root, postmaster, admin, etc, to the administrator.
+
2. Redirect messages from root, postmaster, admin, etc, to the administrator.
  
 
Edit /etc/mail/aliases
 
Edit /etc/mail/aliases
Line 19: Line 19:
 
Update the aliases database:
 
Update the aliases database:
 
{{Command|<nowiki>/usr/sbin/newaliases</nowiki>}}
 
{{Command|<nowiki>/usr/sbin/newaliases</nowiki>}}
Verify that sendmail knows about the different names that the client can have.
+
4. Verify that sendmail knows about the different names that the client can have.
  
 
Edit /etc/mail/local-host-names
 
Edit /etc/mail/local-host-names
Line 50: Line 50:
 
MAILER(`smtp')dnl
 
MAILER(`smtp')dnl
 
...</nowiki></pre>}}
 
...</nowiki></pre>}}
Activate the new configuration
+
5. Activate the new configuration
 
{{Command|<nowiki>yes | sendmailconfig</nowiki>}}
 
{{Command|<nowiki>yes | sendmailconfig</nowiki>}}
 
== Seguridad ==
 
== Seguridad ==
Line 59: Line 59:
 
sendmail: 127.0.0.1
 
sendmail: 127.0.0.1
 
</nowiki></pre>}}
 
</nowiki></pre>}}
Si se usan otros filtros se debe permitir el acceso al puerto localhost:25/tcp desde localhost:>1025/tcp
+
If different filters are used, it's necessary to allow the access to the port localhost:25/tcp from localhost:1025/tcp
 
 
 
== Limpieza (opcional)==
 
== Limpieza (opcional)==
Eliminar el ssmtp
+
Remove ssmtp
 
+
{{Command|<nowiki>aptitude remove ssmtp</nowiki>}}
aptitude remove ssmtp
+
If the DNS setup isn't defined in /etc/network/interfaces, remove resolvconf
 
+
{{Command|<nowiki>aptitude remove resolvconf</nowiki>}}
Si la configuración DNS no está definida en /etc/network/interfaces, eliminar el resolvconf
 
aptitude remove resolvconf
 

Revision as of 21:16, 5 September 2014

Back to Mail server

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

Seguridad

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

Limpieza (opcional)

Remove ssmtp

aptitude remove ssmtp

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

aptitude remove resolvconf