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Arunas Bartisius's questions

Martin Hope
Arunas Bartisius
Asked: 2021-08-21 08:43:33 +0800 CST
  • 14

Doing recommended upgrade path, TL;DR:

Backup data, then

apt update
apt upgrade
apt dist-upgrade
reboot

Also disable all non main stream packages if any.

Then preparing APT for new distribution:

sudo sed -i 's/buster/bullseye/g' /etc/apt/sources.list
sudo sed -i 's/buster/bullseye/g' /etc/apt/sources.list.d/*

The first command shows error:

apt update
...
Err:6 http://security.debian.org/debian-security bullseye/updates Release
  404  Not Found
Reading package lists... Done
E: The repository 'http://security.debian.org/debian-security bullseye/updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
debian apt upgrade debian-buster
Martin Hope
Arunas Bartisius
Asked: 2016-01-15 02:01:06 +0800 CST
  • 1

There is sendmail relay host for LAN/external users using AUTH or trusting local users, but there is a problem that sendmail accepts mail from trusted users addressed for non existing domains (non intentionally), like [email protected] which are written by mistake.

Flow is this: Auth user -> sendmail -> relay mail server

of course mail gets back from relay server with error that recipient domain does not exist, but I want to intercept this situation at sendmail with smart host.

sendmail config has important parameters:

dnl SMTP Auth
define(`confAUTH_OPTIONS',`A y')
include(`/etc/mail/sasl/sasl.m4')dnl

FEATURE(`no_default_msa')dnl
DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=0.0.0.0')dnl
DAEMON_OPTIONS(`Family=inet,  Name=MSP-v4, Port=submission, Addr=0.0.0.0')dnl

define(`confPRIVACY_FLAGS',dnl
`needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings,noreceipts')dnl

FEATURE(`access_db')dnl

FEATURE(`use_cw_file')dnl
FEATURE(`always_add_domain')dnl
FEATURE(`virtusertable')dnl

define(`SMART_HOST',`smarthost.mydom.com')dnl
define(`conf_LOG_Level',`14')dnl

dnl # antispam
FEATURE(`dnsbl',`....

MAILER_DEFINITIONS
MAILER(`local')dnl
MAILER(`smtp')dnl

and it's important to mention, there is mimedefang filter with antivirus and spam-assasin.

How I can force sendmail to not relay bad recipient domain?

sendmail
Martin Hope
Arunas Bartisius
Asked: 2015-02-05 08:09:45 +0800 CST
  • 2

In Debian Linux stable version, there is always lag between current and stable version. Thus one of packages Clamav is very noisy about this, and log files are full of:

WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.98.5 Recommended version: 0.98.6
DON'T PANIC! Read http://www.clamav.net/support/faq

I am using monitoring package Logwatch, and it sends all this to my email. Is there a way to stop freshclam from writting this warning to log or skip it from Logwatch?

linux