nfs4 ubuntu firewall

An NFS exchange server works normaly out of the box. But if you need to have a firewallscript like iptables on your system NFS connection will fail. Why is the big question … NFS works with rpc (Remote Procedure Call).…

static dns entries via script

Sometimes you have do add static DNS names to IP addresses. For Example all your network equipment, switches routers … are mostly not able to register themselves into Windows DNS. I had a similar problem. I hat a lot of…

cisco device as ntp server

Most of Cisco devices can act as NTP sources for time synchronisation within a network. To achieve this you need to so some configuration: ! set NTP SOURCE e.g. internet conf t ntp server 91.189.94.4 ! ! check ntp config…

telnet source interface

Sometimes a router has different interfaces for routing. and not all IPS are going everywhere. Therefor you can define the source interface for Cisco devices to get access to other devices. telnet 192.168.1.4 /source-interface FastEthernet0 To configure this interface as…

tar via SSH

How to backup files over ssh ? A nice way of backuping files from one machine to an other is a zipped tar file transferred via ssh. # tar zcvf – /var/www | ssh root@backupserver “cat /backup/www-backup.tar.gz” Your output will…