The Cisco 520 Ethernet to Ethernet router can be used as a PPPoE Client (Point to Point over Ethernet) to connect a small office to a DSL service for Internet access. Also, using Network Address Translation (NAT), you can connect multiple computers to the Internet using the same router. The same configuration applies also for […]
Technical Assistance Center (TAC) Vs NetPro Connection Forum
If you purchase a service contract with Cisco, you can have access to the so called TAC service (Technical Assistance Center) which is a technical support team spread all over the world to assist you in troubleshooting and solving any technical Cisco problem you may have. When you open a TAC case, they usually ask […]
Cisco Internet Home Network Solutions
Connecting Your Home Today’s Internet is quickly becoming as much a part of daily life in the home as water, gas, and electricity. A high-speed, always-on Internet connection is now a fundamental utility in the home, enabling a broad range of applications, solutions, and services that save people time, increase family convenience and security, and […]
Cisco new Router Series ASR 1000
Cisco announced recently a new WAN Router model, the ASR 1000 series. This is a high performance integrated services device, which can be used for both Enterprise and Service Provider networks. One of the key hardware design features of this router model is its Cisco QuantumFlow processor which can support any current and future services […]
Cisco ASA 5500 Dual ISP Connection
Starting from version 7.2(1) and upwards, the Cisco ASA 5500 series firewall supports now the Dual-ISP capability. You can connect two interfaces of the firewall to two different ISPs and use the new “SLA Monitor” feature (SLA=Service Level Monitoring) to monitor the link to the primary ISP, and if that fails, the traffic is routed […]
Protecting the Telnet VTY Lines of Cisco Devices
There are usually 5 VTY lines on Cisco routers (VTY 0 to 4). An attacker can perform a Denial of Service attack by opening several simultaneous Telnet or SSH connections to the router, thus occupying all available lines and prohibiting the legitimate administrators for managing the device. To protect from this kind of attack, we […]
Cisco VPN Client Setup and Configuration
A Remote Access VPN (Virtual Private Network) is a connection technology to provide secure and confidential connection of remote users to internal company resources through the Internet. The remote company user needs to have a VPN client software (e.g Cisco VPN client) installed on his/her laptop plus a normal Internet connection (cable internet, broadband ADSL, […]
Is router uptime a measure of stability or insecurity ?
I was reading Cisco Packet Magazine the other day, and noticed a few mails from readers claiming that they have many Cisco routers in their network running continuously for more than 3 years. The continuous long uptime of a router shows stability and reliability of the specific hardware, but on the other hand it reveals also […]
ASA Firewall NAT Control Feature
With the original PIX firewall models, all traffic traversing a Cisco Firewall between inside to outside (higher security level to lower security level) had to match a NAT rule, otherwise the traffic was blocked. For example, in order for an inside web client host to access an outside web server host, there should have been a NAT translation […]
Firewall Technologies
Firewalls are used to protect computer networks from hostile intrusions. A hardware firewall separates trusted internal networks (e.g Internal corporate LAN) from external non-trusted networks (e.g Internet or untrusted WAN). The primary objective of the firewall is to examine all inbound and outbound traffic to see if it meets specific criteria (firewall policy rules). If […]