Traffic delivery is fundamental for user experience on the Internet. To achieve this, Autonomous Systems (ASes) rely on their multiple connectivity options and manipulate prefix announcements to influence neighboring ASes' route decisions. One crucial aspect not yet investigated is how traffic engineering techniques may affect the prefix suitability of being hijacked or impacted by a route leak. We aim to examine how AS's connectivity and inbound traffic engineering techniques influence routing security. We use the PEERING Testbed combined with data and control plane measurements to offer systematical analyses of these aspects. Our preliminary evaluation indicates that connectivity plays an important role and that using ASPP directly influences the security impacts.

In May 2024, Rio Grande do Sul, Brazil's southernmost state, endured a month of severe rainfall, leading to extensive infrastructure damage in more than 400 cities. This major climatic event caused widespread disruptions to the state's infrastructure, including roads, bridges, electrical plants, data centers, communication systems, and homes, affecting millions of people. In this paper, we describe the datasets we are collecting from various sources, including official reports, IXP connectivity and routing information, Internet quality measurements, and failure reports from data centers, the ISPs assotiation in the region, and the Brazilian National Research and Education Network. These datasets are being used to provide the first analyses of how these events affected the resilience of the Communication Technology (ICT) infrastructure in Rio Grande do Sul. We plan to make these datasets available to the community for future studies on the climate impact on communications infrastructure and to better identify the challenges faced when resilience is critically tested. Additionally, we hope this data can outline improvements in ICT infrastructure to enhance operations and aid in the reconstruction process.

Efficient traffic delivery is a key aspect of Internet operations. To achieve this goal, network operators rely on expanding their footprint and performing inbound traffic engineering to influence other ASes' route decisions.

Internet eXchange Points (IXPs) have significantly transformed the structure and economics of the Internet by allowing many nearby networks to connect directly, avoiding the need for service providers. These large IXPs are so beneficial that they are not just used by nearby networks, but also by far away Autonomous Systems (AS). This is made possible by Remote Peering (RP), which typically involves the use of RP resellers to access remote IXPs. In this paper, we evaluate the effects of RP on four different routing aspects, using a representative group of IXPs located on three continents: (a) growth of RP deployment over one and a half years; (b) presence of route announcement mispractices (when networks prioritize the remote IXP over the local IXP), which are associated to routing anomalies; (c) reliability of RP interfaces and (d) adoption of RP-related BGP communities, i.e. to perform traffic engineering to remote peers. We make our data and results available to the community via a web portal.

Border Gateway Protocol (BGP) communities, an optional message attribute, allow network operators to tag BGP announcements and act on routing decisions. Although widely used, it is so far unclear how prevalent the different types of communities are and the degree to which the different traffic engineering actions have been used. There are two major reasons for this gap: few community values have been standardised and the limited visibility at route collectors.

Inbound traffic engineering (ITE)---the process of announcing routes to, e.g., maximize revenue or minimize congestion---is an essential task for Autonomous Systems (ASes). AS Path Prepending (ASPP) is an easy to use and well-known ITE technique that routing manuals show as one of the first alternatives to influence other ASes' routing decisions. We observe that origin ASes currently prepend more than 25% of all IPv4 prefixes.

Autonomous Systems (ASes) can reach hundreds of networks via Internet eXchange Points (IXPs), allowing improvements in traffic delivery performance and competitiveness. Despite the benefits, any pair of ASes needs first to agree on exchanging traffic. By surveying 100+ network operators, we discovered that most interconnection agreements are established through ad-hoc and lengthy processes heavily influenced by personal relationships and brand image. As such, ASes prefer long-term agreements at the expense of a potential mismatch between actual delivery performance and current traffic dynamics. ASes also miss interconnection opportunities due to trust reasons. To improve wide-area traffic delivery performance, we propose Dynam-IX, a framework that allows operators to build trust cooperatively and implement traffic engineering policies to exploit the rich interconnection opportunities at IXPs quickly. Dynam-IX offers a protocol to automate the interconnection process, an intent abstraction to express interconnection policies, a legal framework to digitally handle contracts, and a distributed tamper-proof ledger to create trust among ASes. We build and evaluate a Dynam-IX prototype and show that an AS can establish tens of agreements per minute with negligible overhead for ASes and IXPs.

In this paper an automated platform for immersive multiprojection visualization of manufacturing processes is proposed. It admits scenarios with dynamic components and allows Virtual Reality collaborative visualization among geographically distributed users, through multi-CAVE devices. Modules for modeling, converting, visualizing and interacting composes the platform. The proposed system can be applied to CAD projects, models and simulations used in industry. The ideas discussed are then validated through the study of a real case related to the Shipbuilding and Offshore Industries.