Just run these commands.
yum install git
git clone https://github.com/corbanworks/aws-blocker.git
yum install jq
cd aws-blocker
bash aws-blocker
iptables-save | sudo tee /etc/sysconfig/iptables
service iptables save
service iptables restart
I recently need to block Barracuda network ips from accessing my mail server, MailWizz. I did the typical
iptables -A INPUT -s 64.235.144.0/20 -j DROP
iptables -A INPUT -s 209.222.80.0/21 -j DROP
iptables -A INPUT -s 35.176.92.96/27 -j DROP
iptables -A INPUT -s 35.157.190.224/27 -j DROP
iptables -A INPUT -s 5.188.211.0/24 -j DROP
iptables -A INPUT -s 204.101.161.159 -j DROP
iptables -A INPUT -s 207.102.138.158 -j DROP
then
service iptables save
service iptables end
the problem with this setup is that those rules end up getting appended to the end and never get blocked. It’s better to go into the iptables directly. ON Centos 7, that is located in /etc/sysconfig/iptables. I added these lines directly before any of the rules were executed.
-A INPUT -s 64.235.144.0/20 -j DROP
-A INPUT -s 209.222.80.0/21 -j DROP
-A INPUT -s 35.176.92.96/27 -j DROP
-A INPUT -s 35.157.190.224/27 -j DROP
-A INPUT -s 5.188.211.0/24 -j DROP
-A INPUT -s 204.101.161.159/32 -j DROP
-A INPUT -s 207.102.138.158/32 -j DROP
I’m also putting in a post on how to block Amazon Bots. However you’ll need to redo the above after running these commands in Centos 7
yum install git
git clone https://github.com/corbanworks/aws-blocker.git
yum install jq
cd aws-blocker
bash aws-blocker
iptables-save | sudo tee /etc/sysconfig/iptables
service iptables save
service iptables restart
Then add the above manually and you’ll have both AWS and Barracuda blocked.
I recently had a project with SQL Server 2014 utilizing the Visual Studio 2015 shell for a Sql Server Integration Project. I tried to run the SSIS task in Visual Chron and kept getting errors. After exhaustive research I discovered that I had to make sure to go into the project properties and choose SQL Server 2014 as your TargetServerVersion. Once I did this and recompiled one of my scripts, it worked.
Flush the postfix queue:
postifx flush
Clear the mail log
/var/log/mail.log
display the mail log live while testing mail
tail -f /var/log/mail.log
Clear the mail queue
postsuper -d ALL
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At my company we regularly send out email marketing and emails for our vendors. We needed a solution that could utilize multiple domains and multiple IPS. We decided to host our email solution on a Linux VM using VirtualMin. Here’s … Continue reading
I recently migrated a SQL Server 2008 R2 database to SQL Server 2014. We host with Rackspace, so I had them restore our databases from backup to the new server. I was left with database users that weren’t linked to SQL Server Users. Even after I added the users they were still not linked together and the system wouldn’t offer me the option. The following SQL allowed me to fix the problem.
The new database clearly won’t have the SQL Server Login Users until you add them so add them manually before you run the above routines.