A user with an iPhone sends and email with an attachment to a recipient on a Zimbra server. The email is rejected and the following entry is made in the log: Mar 8 16:08:41 mx2 postfix/cleanup[20141]: 654AD251CD: reject: header Content-Type: … Continue reading →
zmprov ms `zmhostname` zimbraIPMode both /opt/zimbra/libexec/zmiptool zmcontrol restart Then update /etc/sysconfig/ip6ables and execute service ip6tables restart
Continue reading →By default, emails with an encrypted PDF or archive (i.e. zip) attachment will be blocked by Zimbra’s antivirus program, ClamAV. The user will be notified by an email titled ‘VIRUS (Heuristics.Encrypted.PDF) in mail FROM….’ with a message containing ‘A virus … Continue reading →
I found the following entries in my /var/log/messages file Feb 21 03:50:01 vm1 systemd: Created slice user-0.slice. Feb 21 03:50:01 vm1 systemd: Starting Session 6642 of user root. Feb 21 03:50:01 vm1 systemd: Started Session 6642 of user root. These … Continue reading →
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 →