At the moment we see spamming mails, which are sent via the contact form, on many customer servers running a current Joomla and OS. The logs contain lines like: 117.90.137.141 – – [08/Sep/2017:20:01:37 +0200] “POST /index.php/kontakt HTTP/1.1” 302 483 “http://www.WEBSEITE.de/index.php/kontakt” “Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) […]
Requirements: ISPConfig >= 3.1 and Bind DNS-Server Installation: cd /tmp wget https://www.schaal-it.com/downloads/caa-patch.tgz tar xfz caa-patch.tgz cd caa-patch php -q install.php Install this patch on all servers in a multiserver-setup. What is a CAA-Record? CAA can be used to determine which certification authority is allowed to issue certificates for the domain. […]
With the Antispam plugin from Dovecot, new spam mails can be pushed by hand into their own IMAP folder. Mails that are moved to this folder, spamassassin learns as spam mails. If a mail is moved from this folder (for example to the INBOX because it is not spam), spamassassin […]
I intalled PHP 7 als as and additional PHP-Version using https://www.howtoforge.com/tutorial/how-to-install-php-7-on-debian/ installiert. To use PHP7 on Debian Jessie with imagick: apt-get install libmagickwand-dev libmagickcore-dev cd /opt/php-7.1/etc pecl -C ./pear.conf install imagick echo extension=imagick.so >> ../lib/php.ini
With some versions of MariaDB, the server could stop responding to sql queries. service mysql status shows mysql[413]: ERROR 23 (HY000) at line 1: Out of resources when opening file ‘./…’ (Errcode: 24 “Too many open files”) [ERROR] Error in accept: Too many open files To adjust the limits of […]
Sometimes an installation fails due to inappropriate dependencies. This is usually due to additional repos. This can be remedied by downgrading the not matching packet. As an example here the output of apt-get install openssl-dev: libssl-dev : Depends: libssl1.0.0 (= 1.0.1t-1+deb8u5) but 1.0.2j-1~bpo8+1 is to be installed Recommends: libssl-doc but […]
Today I had a server that throws a lot of /proc/devices: No entry for device-mapper found during an update. The solution is quite simple: modprobe dm-mod && dpkg-reconfigure grub-pc
To send emails with Postfix, a few things have to be considered. These are either defined in RFCs or generally useful. 1. matching reverse DNS RFC1912 requires that the PTR record and the A record in DNS match. On the one hand it shows that the administrator understands the RFCs, […]