The level of sophistication and determination is not new nor is the type of data targeted. I refrain from using the term advanced persistant threat APTbecause while it has had a fairly precise meaning among the people using the term for some time, the meaning has been blurred quite a bit of late. For the purposes of this article, the specific identities of the attackers, including affiliation or backing by nation-states, is not important. Maybe the one thing that is new is the type of industry targeted.
Rochester Institute of Technology. Utkarsh Shah Thesis Title: Ali Raza Chair Dr. Charles Border Committee Member Dr. Harry Manifavas Committee Member 3 R. With the development of real-time applications several challenges were faced within traditional IP networks.
Some of these challenges are delay, increased costs faced by the service provider and customer, limited scalability, separate infrastructure costs and tcprewrite add ethernet header wireshark administrative overheads to manage large networks etc. To combat these challenges, researchers have steered towards finding alternate solutions.
Over the recent years, we have seen an introduction of a number of virtualized platforms and solutions being offered in the networking industry.
Virtual load balancers, virtual firewalls, virtual routers, virtual intrusion detection and preventions systems are just a few examples within the Network Function Virtualization world!
Service Providers are trying to find solutions where they could reduce operational expenses while at the same time meet the growing bandwidth demands of their customers.
The main aim of this thesis is to evaluate the performance of voice, data and video traffic in a virtualized service provider core. Observations are made on how these traffic types perform on congested vs uncongested links and how Quality of Service treats traffic in a virtualized Service Provider Core using Round Trip Time as a performance metric.
This thesis also tries to find if resiliency features such as Fast Reroute provide an additional advantage in failover scenarios within virtualized service provider cores.
Juniper Networks vsrx are used to replicate virtual routers in a virtualized service provider core.
Twenty-Four tests are carried out to gain a better understanding of how realtime applications and resiliency methods perform in virtualized networks.
It is observed that a trade-off exists when introducing QoS on congested primary and secondary label switched paths. What can be observed thru the graphs is having Quality of Service enabled drops more packets however gives us the advantage of lower Round Trip Time for in-profile traffic.
On Utkarsh Shah iii 5 the hand, having Quality of Service disabled, permits more traffic but leads to bandwidth contention between the three traffic classes leading to higher Round-Trip Times. The true benefit of QoS is seen in traffic congestion scenarios. The test bed built in this thesis, shows us that Fast Reroute does not add a significant benefit to aid in the reduction of packet loss during failover scenarios between primary and secondary paths.
However, in certain scenarios fast reroute does seem to reduce packet loss specifically for data traffic. The physical and logical topologies are given below: Logical Topology Utkarsh Shah iv 6 Acknowledgements This thesis is dedicated to Nyshaa and Karsh, the zero and one that make up my life!
I would also like to thank my parents who have always believed in my dreams and given me the courage to overcome all the challenges that lie in its path. I would also like to thank Dr. Charles Border and Dr. Harry Manifavas who have contributed their ideas and helped me see this thesis thru!
I have learnt a lot under their guidance and for this I am grateful.I have a pcap captured with Wireshark.
Is there any function in Wireshark that will strip Ethernet layer from the result? Or any command line tool to do it? Analytics for tcp checksum repair software Add to watchlist.
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tcprewrite − Rewrite the packets in a pcap file. SYNOPSIS. Allows you to rewrite ethernet frames to add a q header to standard ethernet headers or remove the q VLAN tag information.
add Rewrites the existing ethernet header as an q VLAN header. This pcap file too big and doesn't have ethernet header. So i splitted pcap file to small size(40 MB) by using editcap and attach ethernet header by using tcprewrite. I send pcap file traffic by using tcpreplay from PC1 to PC2.
tcprewrite from tcpreplay can do this.. You need to overwride the output format to Ethernet II, and supply the source MAC and dest . If the -e flag is specified, the link level header is printed out. On Ethernet and token-ring, the source and destination addresses, protocol, and packet length are printed.-fPrints foreign internet addresses numerically rather than symbolically.-FUses File as input for the filter expression.
tcpreplay was enhanced significantly to add.