Notes

cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 bernina.u3.cyberlab.fhnw.ch bernina

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters


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cat /etc/hostname
bernina

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cat /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
enp0s3:
addresses:
- 192.168.97.24/22
routes:
- to: default
via: 192.168.96.1
nameservers:
addresses:
- 192.168.64.10
- 192.168.64.11

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cat /etc/bind/named.conf.options
options {
directory "/var/cache/bind";
forwarders {
192.168.97.24;
192.168.97.25;
};
empty-zones-enable false;
dnssec-validation auto;
listen-on-v6 { any; };
};

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cat /etc/bind/named.conf.local
zone "u3.cyberlab-fhnw.ch." {
type master;
key-directory "/var/lib/bind/u3.cyberlab-fhnw.ch.keys";
dnssec-policy default;
inline-signing yes;
file "/var/lib/bind/db.u3.cyberlab-fhnw.ch";
};

zone "u3.cyberlab.fhnw.ch." {
type master;
key-directory "/var/lib/bind/u3.cyberlab.fhnw.ch.keys";
dnssec-policy default;
inline-signing yes;
file "/var/lib/bind/db.u3.cyberlab.fhnw.ch";
};

zone "24/29.97.168.192.in-addr.arpa." {
type master;
key-directory "/var/lib/bind/reverse.keys";
dnssec-policy default;
inline-signing yes;
file "/var/lib/bind/db.reverse";
};

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cat /var/lib/bind/db.u3.cyberlab.fhnw.ch
$TTL 300
@ IN SOA ns1 postmaster.u3.cyberlab.fhnw.ch. (
2023112106 ; SERIAL
80 ; REFRESH
80 ; RETRY
80 ; EXPIRE
80 ; NEGATIVE CACHE TTL
)
IN NS ns1.u3.cyberlab.fhnw.ch.
IN NS ns2.u3.cyberlab.fhnw.ch.
IN MX 10 mail.u3.cyberlab.fhnw.ch.
IN TXT "v=spf1 mx -all"
mail._domainkey IN TXT ( "v=DKIM1; h=sha256; k=rsa; "
"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAytaEZsUB2HadIzzE4V8HBgVBATfQkyG3jUCkMPEwVgPNvTRmqKmx7QyttTy8BV5zGPH23vpH7lfcShMghuiqYw8lT1VpynvzRRyt5wiVVlXqzb4PYgQoLIoAbzWgjt4eWtOJ4KnNaIm2+OOgChdPWLLQgLhnwwROxQSie/l5SCi7szKBscd3VaP+llKQMPPMlUhEgzh2xDEbHK"
"VYXBmStyhV7aa34D2BzdWJQjOiUv78Ma4PGn/BnTy//UWCq4cZC9KJgevPIeBeBXoNBGZCNI4+YaYQkHk8+MRDkgtZom2RfzQiuHUelm51y8ADaC7mdrE6eeVnb8xaR3IUdB6IZQIDAQAB" )
ns1 IN A 192.168.97.24
ns2 IN A 192.168.97.25
bernina IN A 192.168.97.24
mail IN CNAME bernina

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cat /var/lib/bind/db.u3.cyberlab-fhnw.ch
$TTL 300
@ IN SOA ns1 postmaster.u3.cyberlab-fhnw.ch. (
2023112106 ; SERIAL
80 ; REFRESH
80 ; RETRY
80 ; EXPIRE
80 ; NEGATIVE CACHE TTL
)
IN NS ns1.u3.cyberlab-fhnw.ch.
IN NS ns2.u3.cyberlab-fhnw.ch.
IN MX 10 mail.u3.cyberlab-fhnw.ch.
IN TXT "v=spf1 mx -all"
mail._domainkey IN TXT ( "v=DKIM1; h=sha256; k=rsa; "
"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAytaEZsUB2HadIzzE4V8HBgVBATfQkyG3jUCkMPEwVgPNvTRmqKmx7QyttTy8BV5zGPH23vpH7lfcShMghuiqYw8lT1VpynvzRRyt5wiVVlXqzb4PYgQoLIoAbzWgjt4eWtOJ4KnNaIm2+OOgChdPWLLQgLhnwwROxQSie/l5SCi7szKBscd3VaP+llKQMPPMlUhEgzh2xDEbHK"
"VYXBmStyhV7aa34D2BzdWJQjOiUv78Ma4PGn/BnTy//UWCq4cZC9KJgevPIeBeBXoNBGZCNI4+YaYQkHk8+MRDkgtZom2RfzQiuHUelm51y8ADaC7mdrE6eeVnb8xaR3IUdB6IZQIDAQAB" )
ns1 IN A 192.168.97.24
ns2 IN A 192.168.97.25
bernina IN A 192.168.97.24
mail IN CNAME bernina

------------------------------------------
cat /var/lib/bind/db.reverse
$TTL 300
$ORIGIN 24/29.97.168.192.in-addr.arpa.
@ IN SOA ns1.u3.cyberlab.fhnw.ch. postmaster.u3.cyberlab.fhnw.ch. (
2023112101 ; SERIAL
80 ; REFRESH
80 ; RETRY
80 ; EXPIRE
80 ; NEGATIVE CACHE TTL
)

IN NS ns1.u3.cyberlab.fhnw.ch.
IN NS ns2.u3.cyberlab.fhnw.ch.
24 PTR bernina.u3.cyberlab.fhnw.ch.
root@bernina:/etc/opendkim#

------------------------------------------
cat /etc/postfix/main.cf
compatibility_level = 3.6
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix/sbin
data_directory = /var/lib/postfix
mail_owner = postfix
mydomain = u3.cyberlab.fhnw.ch
myorigin = $mydomain
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
mail.$mydomain, www.$mydomain, ftp.$mydomain
unknown_local_recipient_reject_code = 550
mynetworks = 127.0.0.0/8, [::1]/128, [fe80::]/10
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
inet_protocols = ipv4
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination check_policy_service unix:private/postfix-policyd-spf check_policy_service inet:127.0.0.1:10023

smtpd_tls_security_level = may
smtp_tls_security_level = may
# smtpd_tls_cert_file = /etc/ssl/certs/mailserver.crt
# smtp_tls_key_file = /etc/ssl/private/mailserver.key
# smtpd_tls_protocols = !SSLv2, !SSLv3
# smtp_tls_protocols = !SSLv2, !SSLv3

smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = noanonymous

smtpd_proxy_options = speed_adjust

milter_protocol = 6
milter_default_action = accept
smtpd_milters = inet:localhost:10080
non_smtpd_milters = inet:localhost:10080

content_filter = smtp-amavis:[127.0.0.1]:10024

------------------------------------------
cat /etc/postfix/master.cf
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master" or
# on-line: http://www.postfix.org/master.5.html).
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (no) (never) (100)
# ==========================================================================
smtp inet n - y - - smtpd
#smtp inet n - y - 1 postscreen
#smtpd pass - - y - - smtpd
#dnsblog unix - - y - 0 dnsblog
#tlsproxy unix - - y - 0 tlsproxy
# Choose one: enable submission for loopback clients only, or for any client.
#127.0.0.1:submission inet n - y - - smtpd
#submission inet n - y - - smtpd
# -o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
# Choose one: enable smtps for loopback clients only, or for any client.
#127.0.0.1:smtps inet n - y - - smtpd
#smtps inet n - y - - smtpd
# -o syslog_name=postfix/smtps
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
-o content_filter=
-o receive_override_options=no_header_body_checks
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
-o syslog_name=postfix/$service_name
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRXhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# flags=DRX user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
smtp-amavis unix - - - - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
-o max_use=20

127.0.0.1:10025 inet n - - - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_delay_reject=no
-o smtpd_client_restrictions=permit_mynetworks,reject
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=reject_unauth_pipelining
-o smtpd_end_of_data_restrictions=
-o mynetworks=127.0.0.0/8
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o smtpd_client_connection_count_limit=0
-o smtpd_client_connection_rate_limit=0
-o receive_override_options=no_header_body_checks,no_unknown_recipient_checks

postfix-policyd-spf unix - n n - 0 spawn user=policyd-spf argv=/usr/bin/policyd-spf

------------------------------------------
cat /etc/default/postgrey
# postgrey startup options, created for Debian

# you may want to set
# --delay=N how long to greylist, seconds (default: 300)
# --max-age=N delete old entries after N days (default: 35)
# see also the postgrey(8) manpage

POSTGREY_OPTS="--inet=10023 --delay=30"

# the --greylist-text commandline argument can not be easily passed through
# POSTGREY_OPTS when it contains spaces. So, insert your text here:
#POSTGREY_TEXT="Your customized rejection message here"

------------------------------------------
cat /etc/aliases
# See man 5 aliases for format
postmaster: root
abuse: root
root: root
clamav: root

------------------------------------------
cat /etc/amavis/conf.d/15-content_filter_mode
use strict;

# You can modify this file to re-enable SPAM checking through spamassassin
# and to re-enable antivirus checking.

#
# Default antivirus checking mode
# Please note, that anti-virus checking is DISABLED by
# default.
# If You wish to enable it, please uncomment the following lines:


@bypass_virus_checks_maps = (
%bypass_virus_checks, @bypass_virus_checks_acl, $bypass_virus_checks_re);


#
# Default SPAM checking mode
# Please note, that anti-spam checking is DISABLED by
# default.
# If You wish to enable it, please uncomment the following lines:


@bypass_spam_checks_maps = (
%bypass_spam_checks, @bypass_spam_checks_acl, $bypass_spam_checks_re);

1; # ensure a defined return

------------------------------------------
cat /etc/opendkim.conf
Mode sv
AutoRestart Yes
AutoRestartRate 10/1h
UMask 002
UserID opendkim:opendkim
Syslog yes
KeyTable /etc/opendkim/KeyTable
SigningTable refile:/etc/opendkim/SigningTable
Canonicalization relaxed/relaxed
LogResults yes
LogWhy yes
SyslogSuccess yes
Socket inet:10080@localhost
SignatureAlgorithm rsa-sha256

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