Obfuscation of destination IP address
A self proclaimed security architect told me that there were hacking attacks where the hacker “obfuscated” the destination IP address to confuse the router into forwarding the packet out all of its interfaces and subsiquently the packet would live forever. In my limited knowledge I was a bit sceptical. Since he would not explain exactly [...]

Answer Question   |  May 20, 2009  1:01 PM
catq, Hacking tools and techniques, IP address, Network security, Obfuscation, Packets, Routers

Password protection for Network folders
Hi there, This is Faisal, I have a domain environment platform Win2003 & XP. I want to protect my share folders with the password, plz let me know is there any option available or you suggest some reliable software to protect my network folders when users get connected over the network. Thanks n Regards, Faisal

Answer Question   |  December 3, 2009  5:08 AM
Network administration, network folder, Network security, Network Shared Folder, Password Protection, Shared folders, User Permissions, Windows Server 2003

Protecting our internal network
Hi Network engineers/ managers, I’ve been faced with a challenge on how to protect our internal network from threats outside with minimal cost, or none at all (at least for the software when using open source) Can anyone advise me what to use? Ive searched about, CISCO ASA, ISA 2003, SNORT, Untangle, Sourcefire, and I [...]

Answer Question   |  July 9, 2009  3:52 AM
Cisco ASA, Firewalls, ISA 2003, Network firewalls, Network security, Snort, Untangle

sip attacks
I want to test SIP vulnerabilities using Sipp Message generating tool. i have XML files for generating messages. I have sipp running. But i am not able to execute below command. Run sipp with embedded server (uas) scenario: # ./sipp -sn uas Can i get any help. Thank you Regards Sindhu

Answer Question   |  May 13, 2009  3:53 AM
Network security, SIP, SIP Attacks

How to identify the users in the network
I am working on my Masters Project in which I am supposed to design a Network Monitoring tool which will identify the users in the network based on their network behavior. I have a network setup with 4 systems connected to a Switch –> Router –> Internet. I connected another system to the same switch [...]

Answer Question   |  April 15, 2009  6:18 PM
Network design, Network security, Network Topology, Routers, Switches, Wireshark

Using ISA 2004 to block the majority of sites and allow a few.
I am using ISA server 2004. In that, I have blocked a few sites. Now our requirement is allowing only few sites and blocking the rest. How can I? Please help me in this regard.

Answer Question   |  June 8, 2009  3:49 PM
ISA 2004, ISA Server 2004, Network security, Network server software, Networking

How does IPSec Passthrough enable packet transfer through a router?
I have configured a remote access IPSec VPN with UDP encapsulation enabled which passes through a broadband router which in turn has IPSEC Passthrough enabled. The remote access tunnel works fine with the IPSEC Passthrough enabled. However, if the Passthrough option is disabled the tunnel is not established. No ACLs have been configured on the [...]

Answer Question   |  April 19, 2013  3:43 PM
IPsec, IPsec Passthrough, IPsec VPN, Network security, Networking, VPN

Port security for Switches
Switch(config)#interface fastEthernet 0/1 Switch(config-if)#switchport port-security Command rejected: FastEthernet0/1 is a dynamic port. why is that happening

Answer Question   |  April 9, 2009  6:57 AM
Ethernet, Network security, Switch configuration, Switch security, Switches

Deciphering Event Log ID 529 Audit Failure
We have a small network (less than 50 workstations), and I notice in the Security Event Logs of each workstation there will usually be several audit failures. For example: Event Type: Failure Audit Event Source: Security Event Category: Logon/Logoff Event ID: 529 Date: 3/30/2009 Time: 8:19:25 AM User: NT AUTHORITYSYSTEM Computer: [ComputerName] Description: Logon Failure: [...]

Answer Question   |  March 30, 2009  8:06 PM
Event ID 529, Event logs, Network security, Network Security Audits, Security Event Logs

Disadvantages of installing ISA 2004 on DC
hi all what is the disadvantege installing ISA2004 on DC ? and we have a router d-link for small office , we are thinking to install isa2004 , I know that isa must have 2 NIC 1 external 1 internal , the problem I thinkin that currently the public ip address is on the router [...]

Answer Question   |  March 23, 2009  10:26 PM
Domain Controller, Firewalls, ISA 2004, Microsoft Internet Security and Acceleration Server, Network administration, Network security

How to locally authenticate users using PPTP on a local PIX firewall
I need to locally authenticate users using Point-to-Point Tunneling Protocol (PPTP) on a local PIX firewall. Once the users have authenticated, I need them to connect to a Windows 2003 server which is hosted at a remote location securely with encryption or some sort of tunnel. I have already got the authentication working, however, I [...]

Answer Question   |  May 27, 2009  10:27 PM
Authentication, Datacenter Server, Firewalls, Network firewalls, Network security, Networking, PIX, Point-to-point tunneling protocol (PPTP), PPTP, Tunneling, Windows 2003 networking, Windows Server 2003

How to block a specific URL in Cisco routers
Can you block a specific URL in Cisco routers? If so, can you tell me the steps?

Answer Question   |  April 2, 2009  10:18 PM
Cisco Routers, Network routers, Network security, Networking, Networking Equipment, Routers, URL parameters

Routing VLANs to public IPs from Intranet through Fortigate firewall
We have three virtual local area networks (VLANs) as follows: 1 data, 2 voice and 3 wireless. We have 6506e at the core, and interVLAN routing is working fine. The problem is implementing FortiGate firewall in transparent mode and terminating the ISP on the router with Ethernet output. I am not able to route VLANs [...]

Answer Question   |  February 26, 2009  11:28 PM
Firewalls, FortiGate, Internet protocol, InterVLAN Routing, ISP, Network Address Translation, Network hardware, Network security, Network security appliances, Networking, Routers, Routing and switching, Virtual LAN

How to see if my Nmap tcpwrapped port is open after a GFI LANguard scan
I ran Nmap 4.0 and GFI LANguard GFI LANguard Network Security Scanner (N.S.S.) on a Windows 2003 server and noticed that the FTP Port 21 is open but tcpwrapped. How do I check further if Port 21 is indeed open? I’ve checked the IIS6.0 and the Windows Add/ Remove program section there’s not FTP installed. [...]

Answer Question   |  February 25, 2009  6:17 PM
FTP, Network monitoring, Network security, Network security appliances, Networking, Nmap, Ports, Security scanner, tcpwrappers

Can Cisco ASA firewalls restrict Internet access to branch offices?
I have a PPP network between our three office locations. In the master location I have a DSL line connected to my Layer 2 (L2) switch via a Cisco ASA 5505 Firewall. My server (ADC/DHCP/Proxy) is connected to the L2 switch. My branch office locations obtain IP through this server. I am using a Squid [...]

Answer Question   |  March 1, 2009  6:11 PM
Branch Office networks, Branch offices, Cisco ASA, Cisco ASA 5505, Cisco ASA Hardware Firewall, Firewall appliances, Firewalls, Internet connection, Network security, Network security appliances, Networking, Proxy, Servers

Inbound traffic is coming from router IP, not internet IP. Why?
Hello, thank you for your time. I have recently noticed a strange occurence going on with inbound traffic. The other day, I helped my friend set up his network. icmp ping was good. while sniffing, I first noticed inbound tcp traffic to me was not coming from my friend’s IP address, but coming from my [...]

Answer Question   |  February 9, 2011  6:24 AM
Gibson Research Corporation, grc, Hamachi, Network security, packet analysis, Packet sniffers, Packet Sniffing, Packets, Shields Up, syn, VPN

Will a BSc in Information Security get me a network security job?
I would like to get my BSc in Information Security Systems. In the near future I would like to get a networking security career. Do you think this is a good degree? Otherwise what can I do to get into the security field?

Answer Question   |  February 11, 2009  7:47 PM
BSc, Degree, Degree programs, degrees, Information security, Information security careers, IT career planning, IT careers, IT jobs, Network security, Networking, Training, training and certificatio, Training/education

DOS Attack
Hello there This is Faisal Rafiq, I have a problem after Dos attack. I got an error “ISA Server detected routes through the network adapter live that do not correlate with the network to which this network adapter belongs”. Thanks & Regards,

Answer Question   |  February 10, 2009  10:49 AM
DOS Attack, Hacking tools and techniques, ISA Server, Network security, Network Security Management

Restrict users from browsing my computer
hi can any one of tell how can i restrict the users to browse from my computer, but they should be abile to view my home pages

Answer Question   |  February 24, 2009  10:46 AM
Browser security, Network security, User Permissions, User restrictions

VPN password
We’re using a a local database for VPN users. How do I set a new password for an existing user?

Answer Question   |  March 1, 2009  12:35 PM
Cisco PIX 515E, Cisco VPN, Firewalls, Network security, VPN password