Note: for Zimbra 8.6 and newer yum -y install epel-release yum -y install postgrey vim /etc/rc.d/init.d/postgrey find OPTIONS=”–unix=$SOCKET” replace with OPTIONS=”–inet=10023″ Centos 7 yum -y install epel-release yum -y install postgrey vim /etc/sysconfig/postgrey replace the line POSTGREY_OPTS=”–delay=60″ with POSTGREY_OPTS=”–delay=300 –inet=10023″ … Continue reading →
To view current sessions sh vpn-sessiondb remote (IPSec Remote VPN Clients) sh vpn-sessiondb l2l (L2L Tunnels) sh vpn-sessiondb svc (SSL VPN / Anyconnect Clients) sh vpn-sessiondb webvpn (Clientless sessions) sh ssh sessions (show users connected to ASA via SSH) To … Continue reading →
Firewalld is a pain to set up. To switch to iptables: yum -y install iptables-services If you would like to save the firewall rules you need to run the following command iptables-save > /root/iptables-rules.txt These rules can be added to … Continue reading →
You start AnyConnect on Centos 7 using the shortcut and the application flashes on the screen and disappears. So you try running it from the bash prompt and you get: [user@mymachine ~]$ /opt/cisco/anyconnect/bin/vpnui /opt/cisco/anyconnect/bin/vpnui: error while loading shared libraries: libpangox-1.0.so.0: … Continue reading →
To make sure VSFTPD plays nicely with IPTABLES Make sure the following is set in /etc/vsftpd/vsftpd.conf # Turn on SSL ssl_enable=no # Allow anonymous users to use secured SSL connections allow_anon_ssl=NO # All non-anonymous logins are forced to use a … Continue reading →
first – determine the dev of the hard drive – as in /dev/sda /dev/sdb etc Then excute shred -vz -n 3 /dev/XXX where XXX is the identifier of the hard drive Increase 3 to a larger value for higher security … Continue reading →
I changed the port for sshd on my servers to reduce the number of attacks against the sshd server. In the following example, I am changing the port from the default of 22 to 43231 First – backup your sshd_config … Continue reading →
semanage is used in configuring selinux. If it is not installed you need to run yum -y install policycoreutils-python
Continue reading →Centos 7 yum -y install epel-release yum -y groupinstall “GNOME Desktop” yum -y install xrdp xorg-x11-xinit firewall-cmd –permanent –zone=public –add-port=3389/tcp firewall-cmd –reload systemctl start xrdp.service systemctl enable xrdp.service Centos 6 rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm wget -O epel6.key.txt ‘http://keys.gnupg.net:11371/pks/lookup?search=0x0608B895&op=get’ rpm –import epel6.key.txt … Continue reading →
Updated xrdp on a Centos 7 system and xrdp would not start. Error logged in /var/log/messages: Failed at step EXEC spawning /usr/sbin/xrdp: Permission denied Fix: chcon -t bin_t /usr/sbin/xrdp /usr/sbin/xrdp-sesman Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1177202
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