Network technologies and trends:

Servers

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April 25, 2011  5:10 AM

DNS Queries in Windows 2008 R2 Server fails – Part 2



Posted by: Yasir Irfan
ADSM, Blade servers, Cisco ASA, Cisco PIX 525, Cisco PIX 525 firewall, default DNS inspection policy-map, DMZ zone, DNS forwarder, DNS Queries, DNS Queries in Windows 2008 R2 Server, DNS Queries in Windows 2008 R2 Server fails, Internal Network, Internet, internet IP address, ISP, Network technologies & trends, PAT, Servers, Syslog, Windows 2008 R2 Server

In my previous post I was talking about the DNS query problem we were facing with Windows 2008 R2 server. The solution is quite simple. Immediately I started monitoring...

April 24, 2011  5:36 AM

DNS Queries in Windows 2008 R2 Server fails – Part 1



Posted by: Yasir Irfan
Blade servers, Cisco PIX 525 firewall, DMZ zone, DNS forwarder, DNS Queries, DNS Queries in Windows 2008 R2 Server, DNS Queries in Windows 2008 R2 Server fails, Internal Network, Internet, internet IP address, ISP, Network technologies & trends, PAT, Servers, Windows 2008 R2 Server

In our new Data Center we added new HP Blade servers and installed Windows 2008 R2 on those servers. Our Servers are connected inside our network behind a Cisco PIX 525 firewall. We are looking to resolve all our DNS queries for the external network using a DNS IP address provided by our ISP which...


January 18, 2011  11:39 AM

What are Private VLANs (PVLANS)?



Posted by: Yasir Irfan
642-813, CCNP, CCNP Switch, CCNP tips, Cisco CCNP Switch 642-813 certification exam, Cisco Certifications, Cisco Multilayer Switch, Cisco Router, Layer 2, Layer 3, Network environment, PVLANS, Servers, sub-VLAN, VLAN, VLANS, What are private vlans

If you are working hard towards achieving Cisco CCNP Switch 642-813 certification exams, private VLANs does comes into picture. Yeah its part of CCNP Switch 642-813 curriculum.  Cisco basically designed Private VLANs (PVLANS) as part of layer 2 security, in normal condition in any given network...


December 30, 2010  1:21 PM

Skype outage was caused by a bug in its client



Posted by: Yasir Irfan
p2p network, Servers, SKYPE, skype outage, Windows client.

In his blog post Lars Rabbe , Skype’s chief Information officer revealed that the recent Skype outage was caused by the peer-to-peer (P2P) network becoming unstable and suffering a critical...


July 21, 2009  7:58 AM

Support after sales Matters (Cisco Press Support is great)



Posted by: Yasir Irfan
640-802 CCNA Exam, CCENT 640-822 Network Simulator, CCNA, CCNA 640-802 Network Simulator; Pearson, Cisco Press, Cisco Press Support, Cisco Systems, Servers, Support, Technical Support

 

 Whenever we buy anything either it might be a small thing or huge buch...


September 16, 2008  7:55 AM

How to enable browsing with multiple subnets(VLANS) through Microsoft ISA Server 2006



Posted by: Yasir Irfan
Internet Browsing, ISA Server, Microsoft, Microsoft ISA, Networking, Servers, Subnets

Other day we installed Microsoft ISA Server 2006 for Internet Browsing as...


July 13, 2008  6:03 AM

Sample I.T. Security Policy – Internet Security



Posted by: Yasir Irfan
Cisco, Exchange, Internet Security, Linux, Microsoft Windows, Mobile, Network Documentation, Network Documentation Policy, Network Policies, Networking, Policies, Routers, Security, Servers, Switches

Finally we are completing this series; here we go with the last topic. It’s Internet Security Policy which is very important to have for any organization. I would welcome your comments which may encourage me to come up with more interesting stuff....


July 8, 2008  8:20 AM

Sample I.T. Security Policy – Remote Access Security



Posted by: Yasir Irfan
Cisco, Microsoft Windows, Network Documentation Policy, Network Policies, Network Security, Networking, Policies, Remote Access Secuirty, Security, Server Security, Servers

Finally we are almost proceeding towards the completion of the Sample I.T Security policy, we have just two more topics to cover. Coming days I will try to complete that, here we are with Remote Access Security


July 1, 2008  7:25 AM

Sample I.T Securty Policy – Server Security



Posted by: Yasir Irfan
Microsoft Windows, Network Documentation Policy, Network Policies, Networking, Routers, Server Security, Servers, Switches

Now we are proceeding towards the Server Security Policy, which was quite tiresome to draft. 6‐SERVER SECURITY “IS” CONSIDERED THE FOLLOWING: 1. Limit the number of protocols in use throughout the network to the extent possible. 2. Use connection-monitoring software like the performance...


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