Oct
24
2013
Having a DHCP relay on a layer 2 switch is usually a nonsense. However, a DHCP server happened to crash and I had no access to configure a new DHCP service on a remote site.My only option was to set a DHCP relay on the switch that will forward requests to another site to avoid […]
Tags: Cisco, DHCP, network, Switch, VLAN
Dec
15
2012
robocopy is a tool that copies files but more interestingly, it lets you synchronize data from a server (or a NAS) to another Windows server. It is provided with the Windows 2003 Server resource kit tools or natively in Windows 2008 Server and above.Synchronization takes little bandwidth with Robocopy and can be a good way […]
Tags: backup, DOS, network, Windows
Nov
30
2012
Whether you need to redirect telnet or ssh connections through a server because you don’t have direct access to your final destination or you’re planning a web server migration, traffic forwarding comes in handy in many situations.This is easily achieved on Linux distributions that come with IPtables. Yes, iptables isn’t just for ACL rules, but […]
Tags: firewall, iptables, linux, network
Apr
16
2012
Your Excel files on remote networks take up to 2 minutes to load? You think there’s something wrong with your VPN or you need to tune Office? Not at all, here’s how to load your files in just a few seconds! I couldn’t understand why my remote files were so slow to open from a Windows […]
Tags: Excel, Latency, Microsoft, network, Office, performance, Windows
Feb
09
2010
As for any firewall, iptables is able to do network statistics reporting. the -v (–verbose) option along with the list switch (-L) show packets and bytes counters.Network stats are available on a per rule basis. Here is an example on the INPUT chain: In this example, you could split the RELATED and ESTABLISHED state rule […]
Tags: firewall, iptables, linux, network