- mat-wg - mailman.ripe.net

New on RIPE Labs: In-widget Comparison and Monitoring in RIPEstat
by Mirjam Kuehne 24 Jul '13

24 Jul '13

Dear colleagues, You can now monitor network events in real time in two RIPEstat widgets: Country Routing Statistics and BGP Update Activity. And we would like to hear from you for which widgets we should provide this functionality next. Please find more details on RIPE Labs: https://labs.ripe.net/Members/suzanne_taylor_muzzin/new-in-ripestat-in-widg… Kind regards, Mirjam Kuehne RIPE NCC

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Call for Papers: RIPE 67, 14-18 October 2013 in Athens, Greece
by Benno Overeinder 23 Jul '13

23 Jul '13

Call for Presentations A RIPE Meeting is an open event where Internet Service Providers, network operators and other interested parties get together. Although the meeting is mostly technical, it is also a chance for people to meet and network with others in their field. RIPE 67 will take place from 14-18 October 2013 in Athens, Greece. The RIPE Programme Committee (PC) is now seeking content proposals from the RIPE community for the plenary session presentations, BoFs (Birds of a Feather sessions), panels, workshops, tutorials and lightning talks at RIPE 67. The PC is looking for presentations covering topics of network engineering and operations, including but not limited to: - IPv6 deployment - Managing IPv4 scarcity in operations - Commercial transactions of IPv4 addresses - Data centre technologies - Network and DNS operations - Internet governance and regulatory practices - Network and routing security - Content delivery - Internet peering and mobile data exchange Submissions RIPE Meeting attendees are quite sensitive to keeping presentations non-commercial, and product marketing talks are strongly discouraged. Repeated audience feedback shows that the most successful talks focus on operational experience, research results, or case studies. For example, presenters wishing to describe a commercial solution should focus on the underlying technology and not attempt a product demonstration. The RIPE PC accepts proposals for different presentation formats, including plenary session presentations, tutorials, workshops, BoFs (Birds of a Feather sessions) and lightning talks. See the full descriptions of these formats at https://ripe67.ripe.net/programme/i-want-to-present/presentation-formats/ Presenters who are proposing a panel or BoF are encouraged to include speakers from several (perhaps even competing) companies and/or a neutral facilitator. In addition to presentations selected in advance for the plenary, the RIPE PC also offers several time slots for "lightning talks", which are selected immediately before or during the conference. The following general requirements apply: - Proposals for plenary session presentations, BoFs, panels, workshops and tutorials must be submitted for full consideration no later than 4 August 2013, using the meeting submission system (https://ripe67.ripe.net/submit-topic/). Proposals submitted after this date will be considered on a space-available basis. - Lightning talks should also be submitted using the meeting submission system (https://ripe67.ripe.net/submit-topic/) and can be submitted just days before the RIPE Meeting starts or even during the meeting week. The allocation of lightning talk slots will be announced in short notice - in some cases on the same day but often one day prior to the relevant session. - Presenters should indicate how much time they will require. See more information on time slot allocations per presentation format (https://ripe67.ripe.net/programme/i-want-to-present/presentation-formats/) - Proposals for talks will only be considered by the PC if they contain at least draft presentation slides (slides may be updated later on). For panels, proposals must contain a clear description, as well as the names of invited panelists, presenters and moderators. - Due to potential technical issues, it is expected that most, if not all, presenters/panelists will be physically present at the RIPE Meeting. If you have any questions or requests concerning content submissions, please email pc [at] ripe [dot] net. -- Benno J. Overeinder NLnet Labs http://www.nlnetlabs.nl/

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PORTOLAN: A Mobile Crowdsourcing Measurement System
by Luciano Lenzini 08 Jul '13

08 Jul '13

Dear All, The University of Pisa and IIT, an Institute of the Italian National Research Council, have developed a mobile crowdsourcing-based system, named PORTOLAN which uses smartphones as mobile monitors probing the Internet and reporting results to a central server located in Pisa. The aim of PORTOLAN is to enhance the current topology of the Internet at the Autonomous System level of abstraction - all with the contribution of volunteers. The PORTOLAN component that runs on smartphones is now available as an app for the Android platform. It can be downloaded by users from Google play ( <https://play.google.com/store/apps/details?id=it.unipi.iet.portolan.tracero ute> https://play.google.com/store/apps/details?id=it.unipi.iet.portolan.tracerou te). PORTOLAN works in the background, it is designed not to interfere in any way with users' activities and does not affect the smartphone's overall performance. In order to motivate users to contribute to the PORTOLAN project, we have added several services, which include diagnostic network tools (such as Ping, Paris Traceroute with Multipath Detection Algorithm, Maximum Throughput achievable along a path, etc.) and coverage measurement tools. All the tools are totally under the user's control. Data collected by these tools are stored in our servers, in a completely anonymous way. For details see <http://portolan.iet.unipi.it/> http://portolan.iet.unipi.it/. The success of our experiment depends upon the number of users who join the experiment. But to get people to download the app, we really need to raise as much awareness as possible regarding the PORTOLAN itself. So I would like to ask you if it would be possible for you to forward this message to your colleagues, students and anyone else who you think might be interested. Many thanks in advance for your cooperation. All the best, Luciano TECHNICAL NOTE: In PORTOLAN, each smartphone issues at max 200 traceroutes per day, which means a peak traffic rate never higher than 1 KB/s and an average traffic rate never higher than 2 MB/day. The impact of these activities on the battery consumption is negligible. Signal coverage measurements are completely costless in terms of energy or bandwidth, as the PORTOLAN app passively collects signal strength samples using GPS positions generated by other apps. You have to activate the GPS yourself if you want a coverage map along your route. Given that your route could be up to 50 km or more, then you will obviously use up quite a bit of your battery power. So if you are travelling, then connect your smartphone to a powersource in your car or in the train. In any case, if the battery level goes under 40%, PORTOLAN is automatically suspended. -------------------------------------------------------------- Prof. Luciano Lenzini Department of Information Engineering University of Pisa, Italy e-mail: l.lenzini(a)iet.unipi.it http://www.iet.unipi.it/~lenzini

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New on RIPE Labs: Are All Addresses Equal? (by Stephane Bortzmeyer)
by Mirjam Kuehne 03 Jul '13

03 Jul '13

Dear colleagues, Stephane Bortzmeyer describes another use case for RIPE Atlas: Are IPv4 addresses in which the last byte is zero treated differently than other IPv4 addresses? See his study on RIPE Labs: https://labs.ripe.net/Members/stephane_bortzmeyer/all-ip-addresses-are-equa… Kind regards, Mirjam Kuehne RIPE NCC

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RIPE Atlas Mid-summer community update
by Vesna Manojlovic 01 Jul '13

01 Jul '13

Der colleagues, RIPE Atlas community has been very active recently. I summerized it (ha! pun intended) in the RIPE Labs article, highlighting new community related features for RIPE Atlas anchor hosts, sponsors and "ambassadors". And the article has lots of pretty pictures! Share and enjoy! Warm regards, Vesna https://labs.ripe.net/Members/becha/ripe-atlas-midsummer-2013-community-upd…

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New on RIPE Labs: RIPEstat's Multiple Widget and Resource Comparison
by Mirjam Kuehne 24 Jun '13

24 Jun '13

Dear colleagues, RIPEstat users can now compare results for multiple resources across multiple widgets in a new comparison page - and share the results with others using the permalink feature. In this new article on RIPE Labs we describe several use cases where this new functionality might come in handy: https://labs.ripe.net/Members/suzanne_taylor_muzzin/ripestats-multiple-widg… Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: Measuring IPv6 Capability of RIPE Atlas Probes
by Mirjam Kuehne 12 Jun '13

12 Jun '13

Dear colleagues, Please see a new article on RIPE Labs contributed by Stephane Bortzmeyer: How Many RIPE Atlas Probes Believe They Have IPv6 (But Are Wrong)? https://labs.ripe.net/Members/stephane_bortzmeyer/how-many-atlas-probes-bel… Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: RIPEstat Demo Summary
by Mirjam Kuehne 21 May '13

21 May '13

Dear colleagues, For those of you who missed the RIPEstat demo at the recent RIPE 66 meeting, please find a summary on RIPE Labs: https://labs.ripe.net/Members/suzanne_taylor_muzzin/ripestat-demo-summary-r… Kind regards, Mirjam Kuehne RIPE NCC

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[Fwd: Community suggestion for ATLAS spoof test]
by Vesna Manojlovic 21 May '13

21 May '13

Dear colleagues, please take a look at the suggestion from Alexander Isavnin. Since he is here in Dublin, we can talk about it during MAT-WG or, if there is not enough time, at the RIPE Atlas community BoF. However, the opinion of the rest of the community counts too, so I ask you to comment on the mailing list, if you are interested. Regards, Vesna -------- Original Message -------- Subject: Community suggestion for ATLAS spoof test Date: Wed, 15 May 2013 21:16:30 +0200 From: Alexander Isavnin <isavnin(a)netline.ru> To: Vesna Manojlovic <BECHA(a)ripe.net> Dear Vesna! Could you forward this suggestion to mat-wg mailing list (and other appropriate lists). Due to high requirements to mitigate spoofing there is need to detect one. RIPE community have great distributed networking tool - ATLAS. As first step i suggest to select address from RIPE NCC network and allow all probes (if probe is not behind NAT) to send spoofed packet with this address as source. As first and a half step - allow to send packets with source addresses of anchors (if anchor's host agrees) As second step - allow probe host to permit use his address as spoofed source. Best regards, Alexander Isavnin

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Re: [mat-wg] [Fwd: Community suggestion for ATLAS spoof test]
by k claffy 20 May '13

20 May '13

From: Antoin Verschuren <antoin.verschuren(a)sidn.nl> If all we want to know is an oversight of the state of spoofing now, and in a year's time, can't we just ask the Atlas users (AKA the mailinglist) that want to know to do a 1 time spoofing test on http://spoofer.csail.mit.edu/summary.php from their atlas probe network? IMHO that is less work than to ask Atlas users for permission. Antoin, Thanks for suggesting that, we agree that Atlas nodes are a terrific way to increase the scope of visibility of spoofing. I should note that we have spent the last few months updating the 7-year old spoofer code and web site (btw, it's now at http://spoofer.cmand.org/ , jointly managed by Rob Beverly at nps.edu and CAIDA) including adding tests for IPv6 spoofing ability, making graphs on the summary page clearer, classifying spoofing-capable networks into types, and allowing probing to multiple (CAIDA Ark) destintations (which also increases visibility into spoofing, but not nearly as much as 1000+ Atlas nodes would..) we plan to deploy and announce an updated version by 1 June. so if you're going to encourage Atlas nodes to try our spoofer test, it would be ideal to have them do it shortly after 1 June. we will send an announcement to this list when we release the new version. after june we will still be working on better techniques to filter tests for representativeness, and other methodology improvements. please do send us requests for other changes/additions you would like to see. ( http://spoofer.cmand.org/contact.php ) thanks, k (and Rob Beverly and Ryan Koga, current team)

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New on RIPE Labs: RIPE Atlas Code for Analysis and Statistics Reporting
by Mirjam Kuehne 13 May '13

13 May '13

Dear colleagues, We are releasing the code we use to analyse RIPE Atlas measurements and produce summary statistics. This will make processing these measurement results easier for the community. We're also inviting you to participate in improving this further. Please find more information on RIPE Labs: https://labs.ripe.net/Members/wilhelm/ripe-atlas-code-for-analysis-and-stat… Kind regards, Mirjam Kuehne RIPE NCC

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[Fwd: [ipv6-wg] New on RIPE Labs: Implementing Fifth Start IPv6 RIPEness]
by Vesna Manojlovic 13 May '13

13 May '13

Sorry for the cross-posting -- I think the IPv6 measurements that we are doing for the 5th star in IPv6 RIPEness are of interest to MAT-WG. I'll be presenting about this at IPv6-WG in Dublin, and if there is interest & questions from this group I can mention it too. Regards, Vesna -------- Original Message -------- Subject: [ipv6-wg] New on RIPE Labs: Implementing Fifth Start IPv6 RIPEness Date: Mon, 13 May 2013 07:09:34 +0200 From: Mirjam Kuehne <mir(a)ripe.net> To: ipv6-wg(a)ripe.net Dear colleagues, In this new article on RIPE Labs we present the first results of a fifth star for IPv6 RIPEness. This is a way to measure real IPv6 deployment in the RIPE NCC service region: https://labs.ripe.net/Members/emileaben/ipv6-ripeness-implementing-the-5th-… We would like to receive your feedback on a number of open question raised in the article. We also hope to see many of you at the IPv6 WG meeting in Dublin later this week where these results will be presented. Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: BGPlay now integrated in RIPEstat
by Mirjam Kuehne 08 May '13

08 May '13

[apologies for duplicates] Dear colleagues, We are proud to present a newly revamped version of the well-known BGPlay tool. It is now integrated into RIPEstat and was developed in partnership with the Compunet Research Lab of Roma Tre University. Please find more information on RIPE Labs: https://labs.ripe.net/Members/vastur/bgplay-v2-integrated-in-ripestat Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: Introduction of RIPE Atlas Quick Looks
by Mirjam Kuehne 07 May '13

07 May '13

[apologies for duplicates] Dear colleagues, A new RIPE Atlas feature is now available to RIPE NCC members: Quick Look measurements. Members can use this service for a quick, real-time assessment of connectivity without hosting a RIPE Atlas probe. This feature is based on one-off measurements that are available to all RIPE Atlas probe hosts. Please find more information on RIPE Labs: https://labs.ripe.net/Members/kistel/ripe-atlas-quick-look-for-members Kind Regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: Releasing RIPE Atlas Measurements Source Code
by Mirjam Kuehne 06 May '13

06 May '13

Dear colleagues, This new article on RIPE Labs introduces the RIPE Atlas measurement source code. The measurement code is the part that runs on the RIPE Atlas probes to schedule and execute particular measurements, and thereby forms the core of the RIPE Atlas system. https://labs.ripe.net/Members/philip_homburg/ripe-atlas-measurements-source… Kind regards, Mirjam Kuehne RIPE NCC

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More roadmaps added to RIPE NCC Roadmap
by Mirjam Kuehne 06 May '13

06 May '13

Dear colleagues, We added roadmaps for DNSMON and RIPEstat to the RIPE NCC Roadmap: htps://roadmap.ripe.net Please let us know if you find this useful or if you have any questions or suggestions. Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: Using RIPE Atlas to find most popular DNS anycast instances
by Mirjam Kuehne 03 May '13

03 May '13

Dear colleagues, Please find a new article on RIPE Labs, contributed by Stephane Bortzmeyer: Using RIPE Atlas User Defined Measurements to Find the Most Popular Instances of a DNS Anycast Name Server https://labs.ripe.net/Members/stephane_bortzmeyer/using-atlas-udm-to-find-t… Kind regards, Mirjam Kuehne RIPE NCC

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Re: [mat-wg] Full BGP full view
by Pietro Marchetta 02 May '13

02 May '13

Dear, while a complete and exhaustive view of the BGP global routing would be a milestone for the whole networking research, all the available datasets provide just a partial view, since, as already pointed out by Sebastian Castro, the current datasets are typically obtanied through a set of vantage points with a limited visibility. You might find a recent and well-done analysis on the incompleteness of the BGP view as well as the root causes in this paper: Enrico Gregori, Alessandro Improta, Luciano Lenzini, Lorenzo Rossi, and Luca Sani. On the incompleteness of the AS-level graph: a novel methodology for BGP route collector placement. IMC 2012 At the same time, there several severe sources of inaccuracy to take into account when you use Traceroute to infer the AS level topology/transitions/neighborhood. A good starting reference in this case could be the following paper: Yu Zhang, Ricardo V. Oliveira, Hongli Zhang, Lixia Zhang. Quantifying the Pitfalls of Traceroute in AS Connectivity Inference. PAM 2010 Furthermore, we have recently demonstrated how Third-party addresses cause the inference of a significant percentage of false AS-level links and bogus AS-level loops when Traceroute is used to investigate the AS level connectivity. While this specific limitation has been largely ignored, you may find many more details in this paper: Pietro Marchetta, Walter de Donato, Antonio Pescapé. Detecting Third-party Addresses in Traceroute Traces with IP Timestamp Option. PAM 2013. I hope this helps. Best regards. Pietro Marchetta On 01/05/13 00:43, Pavel V. Veselovskiy wrote: Hello, Hi, I'm validating a new technique for finding the route between autonomous systems with the least number of transitions. This method is came from the wireless sensor networks. To compare the efficiency of this method, and BGP algorithms, we need a full BGP routing table that reflects the configuration of all the neighbors for all AS on the Internet. At first I took the BGP Full View from O-IX site http://www.routeviews.org/ And that's specifically from here http://archive.routeviews.org/oix-route-views/ Already in the first few tests, it was found out that these tables are incomplete, since a number of traceroutes, we have given from the servers is not suitable neighbors and a method results mismatched with the actual path, or the path is longer than the traceroute outputs. Besides knowing the total number of announced AS and counting the number of unique AS numbers for these log files (http://archive.routeviews.org/oix-route-views/), we found that these logs contains references to only about 60% of the number All advertised by AS. I've came across the same issue while doing some research for CAIDA. You have to bear in mind the locations where the BGP dumps are taken are "vantage point", so you will get a view of the network from that point. If you collect enough vantage point, you will reach a state when you can "see" mostly everything. What I did at that time was combine various sources from RouteViews and RIPE RIS (http://www.ripe.net/data-tools/stats/ris/ris-raw-data) until reaching an acceptable level of coverage. Recommend, please, where we can find a really complete picture of all the neighboring AS? Cheers, -- Kind Regards, Pavel Veselovskiy, Samara State Aerospace University -- Sebastian Castro DNS Specialist .nz Registry Services (New Zealand Domain Name Registry Limited) desk: +64 4 495 2337 mobile: +64 21 400535 -- Pietro Marchetta, PhD student Dipartimento di Ingegneria Elettrica e delle Tecnologie dell'Informazione University of Napoli ''Federico II'' Via Claudio, 21 - 80125, Napoli (Italy) WebSite: http://wpage.unina.it/pietro.marchetta Phone: +390817683821 - Fax: +390817683816

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Full BGP full view
by Pavel V. Veselovskiy 30 Apr '13

30 Apr '13

Hello, I'm validating a new technique for finding the route between autonomous systems with the least number of transitions. This method is came from the wireless sensor networks. To compare the efficiency of this method, and BGP algorithms, we need a full BGP routing table that reflects the configuration of all the neighbors for all AS on the Internet. At first I took the BGP Full View from O-IX site http://www.routeviews.org/ And that's specifically from herehttp://archive.routeviews.org/oix-route-views/ Already in the first few tests, it was found out that these tables are incomplete, since a number of traceroutes, we have given from the servers is not suitable neighbors and a method results mismatched with the actual path, or the path is longer than the traceroute outputs. Besides knowing the total number of announced AS and counting the number of unique AS numbers for these log files (http://archive.routeviews.org/oix-route-views/), we found that these logs contains references to only about 60% of the number All advertised by AS. Recommend, please, where we can find a really complete picture of all the neighboring AS? -- Kind Regards, Pavel Veselovskiy, Samara State Aerospace University

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New on RIPE Labs: New Dashboard View and More New Feature on RIPE Atlas
by Mirjam Kuehne 26 Apr '13

26 Apr '13

Dear colleagues, Our latest RIPE Atlas release includes a lot of new features, including completely new opening pages on the website for logged in users and the general public. We also have one-off measurements, APIs, new maps, probe sharing and more! Please find all the details described here: https://labs.ripe.net/Members/kistel/new-ripe-atlas-features-april-2013 Kind regards, Mirjam Kuehne RIPE NCC

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New on RIPE Labs: The BGP Visibility Scanner
by Mirjam Kuehne 24 Apr '13

24 Apr '13

[apologies for duplicates] Dear colleagues, Please find some interesting research by Andra Lutu, Marcelo Bagnulo and Olaf Maennel on RIPE Labs: "The BGP Visibility Scanner" https://labs.ripe.net/Members/andra_lutu/the-bgp-visibility-scanner The authors developed a tool that checks if prefixes have limited visibility. The article describes some of the results found after analysing many months of global routing table data. Please also note the call for feedback at the end of the article. Kind regards, Mirjam Kuehne RIPE NCC

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Preliminary agenda for MAT @ RIPE66
by Richard Barnes 23 Apr '13

23 Apr '13

Hello All, This is the draft agenda for the Measurement, Analysis and Tools Working Group session at RIPE66: A. Introduction Welcome, Scribe, Jabber, Agenda B. Interconnection density in IPv4 / IPv6 - Christian Kaufmann (unconfirmed) B. IETF LMAP - Philip Eardley (BT) (unconfirmed) C. RPKI measurements - Arturo Servin (LACNIC) (unconfirmed) D. RIPE Atlas update - Vesna Manojlovic (RIPE NCC) E. RIPEstat update - Vesna Manojlovic (RIPE NCC) Z. AOB Timings are approximate. There is still some time left in our agenda and we would welcome any late submissions. Please email them to mat-wg-chairs(a)ripe.net. The session will take place at 16:00 local time on Thursday 16th May. See you in Dublin! Richard & Christian

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Measuring IP address hijacking with RIPE Atlas?
by Anatole Shaw 19 Apr '13

19 Apr '13

Currently I work with Greenhost, which is a RIPE LIR that was recently the recipient of a malicious route advertisement, as described here: https://greenhost.nl/2013/03/21/spam-not-spam-tracking-hijacked-spamhaus-ip/ IP address hijacking is a real problem. How often does it happen? Which networks are being spoofed, and which networks are the victims? My sense is that we don't have solid up-to-date answers to these questions. I have some thoughts about how to detect successful IP hijacking, using empirical measurements taken from multiple network vantagepoints. I'll hold off on details for now, but I'm aware that the answer is *not* simple analysis of AS paths or traceroute output, both of which are increasingly spoofed. It seems like the RIPE Atlas probe network would be an ideal platform for this type of study. Does such a study already exist? How does one begin to propose a RIPE Atlas project? Regards, Anatole Shaw

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Verifying the deployability of Multipath TCP
by Olivier Bonaventure 17 Apr '13

17 Apr '13

Dear colleagues, During RIPE66, I will present a tutorial on Multipath TCP, a major TCP extension that has recently been approved by the IETF (RFC6824). The design of Multipath TCP has been heavily influenced by various types of middleboxes that process/modify/... various fields of the IP/TCP packets. Multipath TCP is in theory capable of handling these middleboxes and either go through or at worst fallback to regular TCP. In order to check this fallback mechanism, we ask your help to perform test behing as many real middleboxes as possible. To ease the testing, we have placed a modified Linux kernel that includes Multipath TCP inside a virtualbox image, added several measurement scripts to automate the test and collect packet traces. The tests run on Linux and MacOS. They do not currently work on Windows. You can download the virtualbox image from : http://multipath-tcp.org/pmwiki.php?n=Users.AboutMeasures The script needs about 15 minutes to complete and you will have access to a trace of all the packets sent and received by your virtualbox and our server if you'd like to check the interference caused by your middleboxes. We'd appreciate tests in networks that are more likely to include middlboxes such as entreprise networks, WiFi hotspots or cellular networks. From a technical viewpoint, the tests use various applications including traceroute, ftp (to trigger NAT ALG), http, https, scp. We use multipath subflows (1 and 4) and a modified Multipath TCP kernel that provides more debugging and also three different schedulers. The first scheduler is the standard MPTCP scheduler that sends packets over the best subflows, a second scheduler that sends packets in strict round robin and a scheduler that copies each packet over all subflows to detect the impact of retransmissions. Since Multipath TCP has never been deployed/tested on a large scale, these tests might trigger some alarms from firewalls/IPS/DPI boxes that could detect unknown behaviour. If this happens, please send a report to Fabien Duchene indicating the type of alarm. All the data collected will be analysed and I plan to report on these results during the tutorial at RIPE66 Thanks for your help, Olivier Bonaventure

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Recent RIPE Atlas features and developments
by Vesna Manojlovic 08 Apr '13

08 Apr '13

Dear colleagues, Please find a description of the recent RIPE Atlas features n RIPE Labs: https://labs.ripe.net/Members/suzanne_taylor_muzzin/ripe-atlas-april-2013-u… Highlights: - one-off measurements & REST API for UDMs released to testers - new web-site navigation - we started shipping 3rd generation of probes We also have new ways to take part in the community, by: - adding your code to GitHub Community repository - submitting your photos of probes - meeting RIPE Atlas Ambassadors at some of the upcoming conferences We are looking forward to your feedback and questions. Regards, Vesna

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