Microsoft | Exchange 2013 update Global Address List Warning messages

Updating Global address list warning messages. I was running the following command Update-GlobalAddressList – identity "Default Global Address List" when I received the following warning messages. "WARNING: The Recipient "<domainname>/Microsoft Exchange System objects/OAB version 2" is invalid and couldn't be updated." This warning occurs in my situation way after the migration of exchange 2007 to exchange … Continue reading Microsoft | Exchange 2013 update Global Address List Warning messages

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Microsoft | SNMP settings via Group Policy

Recently I configured SNMP via the Group Policy. How ever by default you are not able to uncheck the Sent Authentication Trap function in the SNMP Serivce Settings. To do this you need to follow the following steps to complete this. Computer Configuration\Policies\Administrative Templates definitions\Network\SNMP\Specify communities. Enable this GPO and enter at Communities your own … Continue reading Microsoft | SNMP settings via Group Policy

Cisco ASA | Juniper site-to-dynamic VPN

Cisco ASA Configuration part When you want to connect to a Juniper Netscreen SG5 device which has a Dynamic IP address. It can be difficult to find what the correct specs are for this type of setup. First you need to go: Configuration > site-to-site VPN > advanced > Tunnel-Groups You have to edit the … Continue reading Cisco ASA | Juniper site-to-dynamic VPN

Cisco | ASA disable SSL 3.0 settings and change it to TLS V1.2

To see if you SSL version for AnyConnect is on a safe level. You want to check this first via the following website https://www.ssllabs.com/ssltest/analyze.html You need to enter your domain name which you use to connect with the clients to logon to. For this you need to use at lease ASA software version 9.3(2) or … Continue reading Cisco | ASA disable SSL 3.0 settings and change it to TLS V1.2

Cisco | SourceFire expert mode Cisco ASA 5506-X

Recently I was updating a Cisco ASA 5506-X SourceFire. It was not the update for the ASA or ASDM, but an update for the SourceFire it self. Via the ASDM you can start an update for a local downloaded file or file downloaded from the internet. In my case i downloaded the file to my … Continue reading Cisco | SourceFire expert mode Cisco ASA 5506-X

Vmware Vsphere 6 | Vcenter password expiration

If you are installing VMware Vcenter 6 in your network and you want to set this policy to no expiration. In the VMware 5.5 you could have done this 2 ways like the way below or via the https://vcenter:5480. The default password lifetime is 90 days, but you can change this lifetime to never expire. … Continue reading Vmware Vsphere 6 | Vcenter password expiration

Cisco | IOS version difference in case of use NO_NAT

Since a couple of years actually I noticed that when I use recent IOS versions on a Cisco ISR device. That there are some struggles with NAT rules in combination with a VPN client. In somecases you have to put the access-list for the NAT rule with a Permit like below. ip access-list extended ACL_OUTSIDE_NO_NAT … Continue reading Cisco | IOS version difference in case of use NO_NAT