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March 20, 2010

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353

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Can firewall protect a computer against viruses and other malware?

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Asked By: Anonymous |

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Firewalls can't protect very well against things like viruses or malicious software (malware). There are too many ways of encoding binary files for transfer over networks, and too many different architectures and viruses to try to search for them all. In other words, a firewall cannot replace security-consciousness on the part of your users. In general, a firewall cannot protect against a data-driven attack--attacks in which something is mailed or copied to an internal host where it is then executed.

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Properly configured firewalls can limit the propagation of worms - a form of malware. Typically, firewalls are edge or parameter devices (separates network zones) and most viruses and malware targets end points (user workstations and servers).

Create Date

Tuesday, November 06, 2007

Tags

software, data, encoding, security, transfer, computer, firewall, viruses, malware, binary files, networks, security-consciousness, internal host

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None

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128

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How secure are Windows SharePoint Services sites hosted by Microsoft?

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Asked By: shadesong |

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Microsoft Windows SharePoint Services Technical security measures provide firewall protection,
intrusion detection, and web-publishing rules. The Microsoft operation center team tests and
deploys software updates in order to maintain the highest level of security and software reliability.
Software hot-fixes and service packs are tested and deployed based on their priority and level of
risk. Security related hot-fixes are rapidly deployed into the environment to address current
threats. A comprehensive software validation activity ensures software stability through regression
testing prior to deployment.

Create Date

Tuesday, May 13, 2008

Tags

Sharepoint

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Job Positions

Webmaster

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220

UPs

Describe the functions of firewalls

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Asked By: Marlon29 |

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Firewall systems protect a network from attack by outside sources. They are placed at the edge of the private network so that they can control traffic from a single point.

Create Date

Friday, March 28, 2008

Tags

network, networking, firewalls

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Network Administrator

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357

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What are the of security policies?

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Asked By: naresh |

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--> Local security Policy like LAN security (like Domain , Active Directory security)

--> Domain based policies that called Group Policy like Internet Security (Through Firewall, checkpoints)

Create Date

Thursday, March 20, 2008

Tags

security, policies

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security

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227

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Can traceout command work across the firewall? If yes/no then why?

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Asked By: naresh |

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Traceroute is based on ICMP type 30 under Windows and UDP under *NIX; traceroute pacjets that would hit the firewall should be dropped similarly any echo replay coming from inside the firewall should be restricted outbound. The answer: traceroute can work via a firewall is firewall is allowing inbound ICMP type 30 and outbound echo reply. !! this should be allowed via internal firewalls ONLY!!
a seconde case is allowing traceroute via firewall outbound with this I do not see any real problem as it can not be used for any device discovery or facilitate any malicious activity, unless being used for an attack coming from inside.

Create Date

Thursday, March 20, 2008

Tags

security, firewall, traceout

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security

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229

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what are the router ACLs and Firewall ACLs?

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Asked By: naresh |

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Fundamental purpose:
1)Routers are designed to route traffic, not stop it.
2)Firewalls are designed to examine and accept/reject traffic.

But the both ACL are do the same job. Depending upon our requirments we do our ACL configuration on it.

Create Date

Thursday, March 20, 2008

Tags

security, router ACL, Firewall ACL

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security

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272

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What is a firewall? how to manage a firewall?

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Asked By: naresh |

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A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. If an incoming packet of information is flagged by the filters, it is not allowed through.
Firewalls use one or more of three methods to control traffic flowing in and out of the network:
* Packet filtering - Packets (small chunks of data) are analyzed against a set of filters. Packets that make it through the filters are sent to the requesting system and all others are discarded.
* Proxy service - Information from the Internet is retrieved by the firewall and then sent to the requesting system and vice versa.
* Stateful inspection - A newer method that doesn't examine the contents of each packet but instead compares certain key parts of the packet to a database of trusted information. Information traveling from inside the firewall to the outside is monitored for specific defining characteristics, then incoming information is compared to these characteristics. If the comparison yields a reasonable match, the information is allowed through. Otherwise it is discarded.

DNS Hijacking mean hijacker spoof the ip of any DNS query. Lets example. user send a DNS requset for YAHOO.com and Hijacker hijack this packet & answer on behalf of DNS and give the wrong IP Assres.

Create Date

Thursday, March 20, 2008

Tags

security, firewall

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None

Job Positions

firewall

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319

UPs

How secure are Windows SharePoint Services sites hosted by Microsoft?

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Asked By: suman |

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Microsoft Windows SharePoint Services Technical security measures provide firewall protection, intrusion detection, and web-publishing rules. The Microsoft operation center team tests and deploys software updates in order to maintain the highest level of security and software reliability. Software hot-fixes and service packs are tested and deployed based on their priority and level of risk. Security related hot-fixes are rapidly deployed into the environment to address current threats. A comprehensive software validation activity ensures software stability through regression testing prior to deployment.

Create Date

Wednesday, March 19, 2008

Tags

Windows, sharepoint, secure

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None

Job Positions

sharepoint

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239

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What are the differences b/w broadband router and Ethernet switch?

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Asked By: Anonymous |

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A switch, keeps a record of the MAC addresses of all the devices connected to it. With this information, a switch can identify which system is sitting on which port. So when a frame is received, it knows exactly which port to send it to, which significantly increases network response times. And, unlike a Hub, a 10/100Mbps switch will allocate a full 10/100Mbps to each of its ports. So regardless of the number of PCs transmitting, users will always have access to the maximum amount of bandwidth. It's for these reasons why a switch is considered to be a much better choice then a hub.
Routers are completely different creatures. Where a hub or switch is concerned with transmitting frames, a router's job, as its name implies, is to route packets to other networks until that packet ultimately reaches its
destination. One of the key features of a packet is that it not only contains data, but the destination address of
where it's going.
A router is typically connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network (ex. your pc or workgroup and EarthLink). Routers are located at gateways, the places where two or more networks connect. Using headers and forwarding tables, routers determine the best path for forwarding the packets. Routers use protocols such as ICMP to communicate with each other and configure the best route between any two hosts.
A router will typically include a 4-to-8 port Ethernet switch (or hub) and a Network Address Translator (NAT). In addition, they usually include a Dynamic Host Configuration Protocol (DHCP) server, Domain Name Service (DNS) proxy server and a hardware firewall to protect the Local Area Network (LAN) from malicious intrusion from the Internet.

Create Date

Wednesday, March 12, 2008

Tags

router, switch, telecom

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Job Positions

telecom

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339

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What are the features of Windows XP?

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Asked By: detech6 |

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Built on the new Windows engine
Enhanced device driver verifier
Dramatically reduced reboot scenarios
Improved code protection
Side-by-side DLL support
Windows File Protection
Windows Installer
Enhanced software restriction policies
Preemptive multitasking architecture
Scalable memory and processor support
Encrypting File System (EFS) with multi-user support
IP Security (IPSec)
Kerberos support
Smart card support
Internet Explorer Add-on Manager
Windows Firewall
Windows Security Center
Attachment Manager
Data Execution Prevention
Windows Firewall Exception List
Windows Firewall Application and Port Restrictions
Fresh visual design
Fresh visual design

Create Date

Monday, March 10, 2008

Tags

features, Windows

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Job Positions

Windows

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