Recursively change folder permissions Exchange 2016

 

FC Adapter HBA Attributes

All cluster’s WWN

 

Adaptive DDOS IDS firewall

We had a task to build a simple solution for DDOS protection on the learning phase of attack. Main goals were:

  1. To build it fast: We chose Ubuntu … as everything needed is compiled and build in.
  2. Minimum network intervention: We opted for L2/L3 bridge with iptables integration which we plugged between our autonomous system (AS) and internet.
  3. Auto learning offenders: Using honeypot service to distinguish non-legitimate connections. Log source IP address and drop packet with iptables. Using suricata ids to additionally analyze client requests.
  4. Auto block offenders: Using fail2ban to pars logs generated by iptables and suricata and temporary disable all connections from offending sources.
  5. Have some connection limit capabilities: Again we used iptables with connlimit and conntrack modules activated.

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OpenWrt mass configure simple script

How to remove duplicated VMs in VMM console

  1.  Move machine to another hyper-v host via Failover Cluster Manager Console
  2.  Get ID of duplicated VM
  3. Double check working and duplicated machine
  4. Delete duplicated VM configuration

    Note the -Force option! You are risking to delete your data If you do NOT put -Force.

Exchange mailbox statistics in MB

 

exchange_stats

Hyper-V Replicate all VMs

 

Installing Apache Ambri on Ubuntu 14.04

If you have error like this:

 

You have to edit :

 

And change version number:

 

ambri_errd

EMC Recover Point – how to recreate repository volume

We have to recreate repository volume of our RP but I could not find any guidance from EMC site. So I’m documenting my steps here for further usage:

Procedure overview:
On EMC storage:

  1. Create about 6-8 GB LUN.
  2. Present that LUN to storage group of RP nodes.

On RP appliances:
On last cluster member:

  1. Detach RPA from cluster
  2. Format repository volume
  3. Reboot
  4. Attach RPA to cluster

On each subsequent appliance:

  1. Detach RPA from cluster
  2. Select repository volume
  3. Reboot
  4. Attach RPA to cluster

This is a transcript of console sessions:
Continue reading “EMC Recover Point – how to recreate repository volume”