The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Azzedine Lansari - One of the best experts on this subject based on the ideXlab platform.
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Effect of Windows XP Firewall on Network Simulation and Testing
Issues in Informing Science and Information Technology, 2007Co-Authors: Akram Al-rawi, Azzedine LansariAbstract:Introduction Cisco Networking Academy (CNA) is widely used in high schools, colleges, and universities all over the world. The Cisco Networking Academy Programs provide critical skills needed by students to work in the IT field. The program offers Web-based content, online assessment, handson labs, instructor training, and preparation for industry certifications such as CCNA and CCNP (http://www.cisco.com/web/learning/netacad/). The networking academy is used primarily to prepare students for Cisco certifications; it is also used for non Cisco certificates, such as CompTIA A+ and Sun Certified Java Programmer (SCJP). The Cisco Networking Academy courses include lab components which are an integral part of all CNA courses. For instance, the CCNA1-CCNA4 courses lab components include routers, switches, as well as some basic equipment and cables, to simulate and test network protocols in a lab environment using Cisco Internetwork Operating System (IOS). Cisco Networking Academy also promotes a product called Packet Tracer 4.0 (PT4) to simulate and test LAN connectivity. It is used as an alternative to the hardware lab to assist students who have no access to CNA hardware lab. Typical Cisco Networking Academy Program which offers CCNA1-CCNA4 consists of a rack-mounted routers and switches along with few other devices to simulate and test network connectivity. The lab deals with different routing protocols: some of them are Cisco proprietary routing protocols such as EIGRP, and some non Cisco proprietary protocols such as RIP and OSPF. The simulation problem under investigation in this paper involves two Cisco routers, one Cisco switch, and two PC's (hosts) running Windows XP along with a serial cable (DCE/DTE) to connect the two routers. Following the completion of a particular Cisco Networking Academy lab simulation, it is typical to test the connectivity between the host computers using Windows ping.exe and tracert.exe which implement the TCP/IP protocol ICMP. A successful ping from all the hosts means that the network is functioning properly at the network layer level. If the ping is not successful it is necessary to start troubleshooting the network until the ping is successful. However, there are cases when the ping is not successful and yet it was not possible to find any problem with the network. On the other hand repeating the same simulation using Cisco Packet Tracer 4.0 simulation software the phenomena is not observed. The objective of this paper is to investigate the reasons behind the ping failure when a network is configured a certain way under the Windows XP, and provides a solution to resolve this connectivity issue in a lab environment. A brief introduction to Windows XP Firewall settings is given in the last section of this paper. Connectivity Tests using Ping and Tracert The ping Command is a good tool for troubleshooting Layer 1 through 3 of the OSI (Open Systems Interconnection) model and diagnosing basic network connectivity (Odom, 2005). Using ping sends an ICMP (Internet Control Message Protocol) packet to the specified device (host, server, router or switch) and then waits for reply. The IP address or host name can be pinged. In order to ping the host name of a router, there must be a static host lockup table in the router or a DNS server for name resolution to IP addresses. The Traceroute Command, abbreviated as trace, is an excellent utility for troubleshooting the path that a packet takes through an internetwork of routers. It can help to isolate problem links and routers along the way. The tracert Command uses ICMP packets and the error message generated by routers when the packet exceeds its Time-To-Live (TTL). The Windows version of this Command is tracert. Cisco Networking Academy uses the ping Command in the lab of the CCNA1-CCNA4 curriculum as a means to verify that the network layer between the source and destination is working properly. …
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Effect of Windows XP Firewall on Network Simulation and Testing
Issues in Informing Science and Information Technology, 2007Co-Authors: Akram Al-rawi, Azzedine LansariAbstract:Introduction Cisco Networking Academy (CNA) is widely used in high schools, colleges, and universities all over the world. The Cisco Networking Academy Programs provide critical skills needed by students to work in the IT field. The program offers Web-based content, online assessment, handson labs, instructor training, and preparation for industry certifications such as CCNA and CCNP (http://www.cisco.com/web/learning/netacad/). The networking academy is used primarily to prepare students for Cisco certifications; it is also used for non Cisco certificates, such as CompTIA A+ and Sun Certified Java Programmer (SCJP). The Cisco Networking Academy courses include lab components which are an integral part of all CNA courses. For instance, the CCNA1-CCNA4 courses lab components include routers, switches, as well as some basic equipment and cables, to simulate and test network protocols in a lab environment using Cisco Internetwork Operating System (IOS). Cisco Networking Academy also promotes a product called Packet Tracer 4.0 (PT4) to simulate and test LAN connectivity. It is used as an alternative to the hardware lab to assist students who have no access to CNA hardware lab. Typical Cisco Networking Academy Program which offers CCNA1-CCNA4 consists of a rack-mounted routers and switches along with few other devices to simulate and test network connectivity. The lab deals with different routing protocols: some of them are Cisco proprietary routing protocols such as EIGRP, and some non Cisco proprietary protocols such as RIP and OSPF. The simulation problem under investigation in this paper involves two Cisco routers, one Cisco switch, and two PC's (hosts) running Windows XP along with a serial cable (DCE/DTE) to connect the two routers. Following the completion of a particular Cisco Networking Academy lab simulation, it is typical to test the connectivity between the host computers using Windows ping.exe and tracert.exe which implement the TCP/IP protocol ICMP. A successful ping from all the hosts means that the network is functioning properly at the network layer level. If the ping is not successful it is necessary to start troubleshooting the network until the ping is successful. However, there are cases when the ping is not successful and yet it was not possible to find any problem with the network. On the other hand repeating the same simulation using Cisco Packet Tracer 4.0 simulation software the phenomena is not observed. The objective of this paper is to investigate the reasons behind the ping failure when a network is configured a certain way under the Windows XP, and provides a solution to resolve this connectivity issue in a lab environment. A brief introduction to Windows XP Firewall settings is given in the last section of this paper. Connectivity Tests using Ping and Tracert The ping Command is a good tool for troubleshooting Layer 1 through 3 of the OSI (Open Systems Interconnection) model and diagnosing basic network connectivity (Odom, 2005). Using ping sends an ICMP (Internet Control Message Protocol) packet to the specified device (host, server, router or switch) and then waits for reply. The IP address or host name can be pinged. In order to ping the host name of a router, there must be a static host lockup table in the router or a DNS server for name resolution to IP addresses. The Traceroute Command, abbreviated as trace, is an excellent utility for troubleshooting the path that a packet takes through an internetwork of routers. It can help to isolate problem links and routers along the way. The tracert Command uses ICMP packets and the error message generated by routers when the packet exceeds its Time-To-Live (TTL). The Windows version of this Command is tracert. Cisco Networking Academy uses the ping Command in the lab of the CCNA1-CCNA4 curriculum as a means to verify that the network layer between the source and destination is working properly. …
Akram Al-rawi - One of the best experts on this subject based on the ideXlab platform.
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Effect of Windows XP Firewall on Network Simulation and Testing
Issues in Informing Science and Information Technology, 2007Co-Authors: Akram Al-rawi, Azzedine LansariAbstract:Introduction Cisco Networking Academy (CNA) is widely used in high schools, colleges, and universities all over the world. The Cisco Networking Academy Programs provide critical skills needed by students to work in the IT field. The program offers Web-based content, online assessment, handson labs, instructor training, and preparation for industry certifications such as CCNA and CCNP (http://www.cisco.com/web/learning/netacad/). The networking academy is used primarily to prepare students for Cisco certifications; it is also used for non Cisco certificates, such as CompTIA A+ and Sun Certified Java Programmer (SCJP). The Cisco Networking Academy courses include lab components which are an integral part of all CNA courses. For instance, the CCNA1-CCNA4 courses lab components include routers, switches, as well as some basic equipment and cables, to simulate and test network protocols in a lab environment using Cisco Internetwork Operating System (IOS). Cisco Networking Academy also promotes a product called Packet Tracer 4.0 (PT4) to simulate and test LAN connectivity. It is used as an alternative to the hardware lab to assist students who have no access to CNA hardware lab. Typical Cisco Networking Academy Program which offers CCNA1-CCNA4 consists of a rack-mounted routers and switches along with few other devices to simulate and test network connectivity. The lab deals with different routing protocols: some of them are Cisco proprietary routing protocols such as EIGRP, and some non Cisco proprietary protocols such as RIP and OSPF. The simulation problem under investigation in this paper involves two Cisco routers, one Cisco switch, and two PC's (hosts) running Windows XP along with a serial cable (DCE/DTE) to connect the two routers. Following the completion of a particular Cisco Networking Academy lab simulation, it is typical to test the connectivity between the host computers using Windows ping.exe and tracert.exe which implement the TCP/IP protocol ICMP. A successful ping from all the hosts means that the network is functioning properly at the network layer level. If the ping is not successful it is necessary to start troubleshooting the network until the ping is successful. However, there are cases when the ping is not successful and yet it was not possible to find any problem with the network. On the other hand repeating the same simulation using Cisco Packet Tracer 4.0 simulation software the phenomena is not observed. The objective of this paper is to investigate the reasons behind the ping failure when a network is configured a certain way under the Windows XP, and provides a solution to resolve this connectivity issue in a lab environment. A brief introduction to Windows XP Firewall settings is given in the last section of this paper. Connectivity Tests using Ping and Tracert The ping Command is a good tool for troubleshooting Layer 1 through 3 of the OSI (Open Systems Interconnection) model and diagnosing basic network connectivity (Odom, 2005). Using ping sends an ICMP (Internet Control Message Protocol) packet to the specified device (host, server, router or switch) and then waits for reply. The IP address or host name can be pinged. In order to ping the host name of a router, there must be a static host lockup table in the router or a DNS server for name resolution to IP addresses. The Traceroute Command, abbreviated as trace, is an excellent utility for troubleshooting the path that a packet takes through an internetwork of routers. It can help to isolate problem links and routers along the way. The tracert Command uses ICMP packets and the error message generated by routers when the packet exceeds its Time-To-Live (TTL). The Windows version of this Command is tracert. Cisco Networking Academy uses the ping Command in the lab of the CCNA1-CCNA4 curriculum as a means to verify that the network layer between the source and destination is working properly. …
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Effect of Windows XP Firewall on Network Simulation and Testing
Issues in Informing Science and Information Technology, 2007Co-Authors: Akram Al-rawi, Azzedine LansariAbstract:Introduction Cisco Networking Academy (CNA) is widely used in high schools, colleges, and universities all over the world. The Cisco Networking Academy Programs provide critical skills needed by students to work in the IT field. The program offers Web-based content, online assessment, handson labs, instructor training, and preparation for industry certifications such as CCNA and CCNP (http://www.cisco.com/web/learning/netacad/). The networking academy is used primarily to prepare students for Cisco certifications; it is also used for non Cisco certificates, such as CompTIA A+ and Sun Certified Java Programmer (SCJP). The Cisco Networking Academy courses include lab components which are an integral part of all CNA courses. For instance, the CCNA1-CCNA4 courses lab components include routers, switches, as well as some basic equipment and cables, to simulate and test network protocols in a lab environment using Cisco Internetwork Operating System (IOS). Cisco Networking Academy also promotes a product called Packet Tracer 4.0 (PT4) to simulate and test LAN connectivity. It is used as an alternative to the hardware lab to assist students who have no access to CNA hardware lab. Typical Cisco Networking Academy Program which offers CCNA1-CCNA4 consists of a rack-mounted routers and switches along with few other devices to simulate and test network connectivity. The lab deals with different routing protocols: some of them are Cisco proprietary routing protocols such as EIGRP, and some non Cisco proprietary protocols such as RIP and OSPF. The simulation problem under investigation in this paper involves two Cisco routers, one Cisco switch, and two PC's (hosts) running Windows XP along with a serial cable (DCE/DTE) to connect the two routers. Following the completion of a particular Cisco Networking Academy lab simulation, it is typical to test the connectivity between the host computers using Windows ping.exe and tracert.exe which implement the TCP/IP protocol ICMP. A successful ping from all the hosts means that the network is functioning properly at the network layer level. If the ping is not successful it is necessary to start troubleshooting the network until the ping is successful. However, there are cases when the ping is not successful and yet it was not possible to find any problem with the network. On the other hand repeating the same simulation using Cisco Packet Tracer 4.0 simulation software the phenomena is not observed. The objective of this paper is to investigate the reasons behind the ping failure when a network is configured a certain way under the Windows XP, and provides a solution to resolve this connectivity issue in a lab environment. A brief introduction to Windows XP Firewall settings is given in the last section of this paper. Connectivity Tests using Ping and Tracert The ping Command is a good tool for troubleshooting Layer 1 through 3 of the OSI (Open Systems Interconnection) model and diagnosing basic network connectivity (Odom, 2005). Using ping sends an ICMP (Internet Control Message Protocol) packet to the specified device (host, server, router or switch) and then waits for reply. The IP address or host name can be pinged. In order to ping the host name of a router, there must be a static host lockup table in the router or a DNS server for name resolution to IP addresses. The Traceroute Command, abbreviated as trace, is an excellent utility for troubleshooting the path that a packet takes through an internetwork of routers. It can help to isolate problem links and routers along the way. The tracert Command uses ICMP packets and the error message generated by routers when the packet exceeds its Time-To-Live (TTL). The Windows version of this Command is tracert. Cisco Networking Academy uses the ping Command in the lab of the CCNA1-CCNA4 curriculum as a means to verify that the network layer between the source and destination is working properly. …
Golmohammadi Zahra - One of the best experts on this subject based on the ideXlab platform.
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Centralized model driven trace route mechanism for TCP/IP routers : Remote Traceroute invocation using NETCONF API and YANG data model
2019Co-Authors: Golmohammadi ZahraAbstract:During the recent years, utilizing programmable APIs and YANG data model for service configuration and monitoring of TCP/IP open network devices from a centralized network management system as an alternative to SNMP based network management solutions has gained popularity among service providers and network engineers. However, both SNMP and YANG lacks any data model for tracing the routes between different routers inside and outside the network that has not addressed. Having a centralized Traceroute tool provides a central troubleshooting point in the network. And rather than having to individually connect to each router terminal, Traceroute can be invoked remotely on different routers. And the responses can be collected on the network management system. The aim of this thesis is to develop a centralized Traceroute tool called Trace that invokes Traceroute CLI tool with a unique syntax from a centralized network management system on a TCP/IP router, traces the hops and BGP AS and measures RTT between a router and specific destination and returns the response back to the network management system. And evaluates the possibility of utilizing this Traceroute tool along with YANG based network management solutions. This implementation has shown that YANG based data models enables a unique syntax on the network management system for invoking Traceroute Command on different TCP/IP devices. This unique syntax can be used to invoke the Traceroute CLI Command on the routers with the different operating systems. And the evaluation has shown that using NETCONF as an API between the network management system and the network devices, enables the Trace to be utilized in YANG and NETCONF based network management solutions
Tamer Rabie - One of the best experts on this subject based on the ideXlab platform.
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IWSEC - Traceroute based IP channel for sending hidden short messages
Advances in Information and Computer Security, 2006Co-Authors: Zouheir Trabelsi, Hesham El-sayed, Lilia Frikha, Tamer RabieAbstract:The paper proposes a novel IP channel for sending hidden short messages, based mainly on the use of the “Traceroute” Command and the IP header Record route options. Instead of encrypting a hidden message or embedding it into a multimedia object, as in traditional multimedia steganography, we process the entire message and generate several IP packets with different types to carry the secret message. Thereby we foil an eavesdropper who is primarily applying statistical tests to detect encrypted communication channels. We show that our approach provides more protection against Steganalysis and sniffing attacks. A friendly graphical tool has been implemented to demonstrate the proposed secret IP channel.
Zouheir Trabelsi - One of the best experts on this subject based on the ideXlab platform.
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IWSEC - Traceroute based IP channel for sending hidden short messages
Advances in Information and Computer Security, 2006Co-Authors: Zouheir Trabelsi, Hesham El-sayed, Lilia Frikha, Tamer RabieAbstract:The paper proposes a novel IP channel for sending hidden short messages, based mainly on the use of the “Traceroute” Command and the IP header Record route options. Instead of encrypting a hidden message or embedding it into a multimedia object, as in traditional multimedia steganography, we process the entire message and generate several IP packets with different types to carry the secret message. Thereby we foil an eavesdropper who is primarily applying statistical tests to detect encrypted communication channels. We show that our approach provides more protection against Steganalysis and sniffing attacks. A friendly graphical tool has been implemented to demonstrate the proposed secret IP channel.