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So yesterday I had written about how routing takes place within the host, So lets see a weird practical example; So on a network (same network), we have 2 hosts like this; HostA(10.10.10.1/255.255.255.0)---------------------HostB(10.10.10.2/255.255.0.0) So by netmask obviously HostA is in a different network than HostB - No question about it! Now, without having a ... Continue Reading

SANS 504 - Hacker Techniques, Exploits and Incident Handling... After around 3 years I am back into a *training* :-) Today was the first day! Nothing much interesting in today's session, since it is all the same; Preached over years.... I believe it is going to be more fun from tommorrow... ... Continue Reading

So what is a Vlan ? Vlan logically separates ports in a switch to give us different networks. So for a machine in Vlan A to communicate to Vlan B, there needs to be a routing eliment - Ah, everybody knows that. Okay, good enough... So if we notice, every vlan is on ... Continue Reading

So on a network segment, how does a networked computer decide on it has to send the traffic to the default router? - A typical question for starters in Interview. Then the guys would go like, the host A has x.x.x.x ip address and it needs to talk to y.y.y.y address, ... Continue Reading

My career as Network Admin / Security Analyst was short about an year and I still remember how the users give up their passwords when asked. I used to work for a company based in US, sitting in India (remotely since I was stuck with my Visa stamping). So whenever someone ... Continue Reading

Got through one of aliases at work, there seems to be an application which basically provides you pop functionality for Yahoo Mail. If you remember, Yahoo had taken off the POP and provide it only for their paid customers. { Click Here } Now, I don't challenge or understand the legal points ... Continue Reading

If SANS means anything to you, then the Tip of the Day sections is something that should be bookmarked. Now, as you see there is no 'rocket science' but the concreteness of substance is achieved working on it again 'n again! http://www.sans.org/tip_of_the_day.php? Wouldn't be at loss, I always remember how I pick ... Continue Reading

Vista editions being out, everybody would definitely like to have a look at the features, at least those who still love Windows like myself. Not full features but all the visual gizmos are worth taking a look. So here is the Vista Transformation Pack (May be an old news by now ... Continue Reading

Business getting onto speeds spreads threat on IM communications as well. One tool you could have in your IT bag would be to audit the IM related communications. Sourceforge has a tool for it; ... Continue Reading

One of the task for every administrator is to make sure that the users don't get onto any site that could prove potential harm to the internal network; So all the time, people use the 'hosts' file heavily to protect by blackholing the connection for unwanted connections; yeah if I put ... Continue Reading