Gozar: NAT-friendly peer sampling with one-hop distributed NAT traversal
2011 (English)Conference paper (Other academic)
Gossip-based peer sampling protocols have been widely used as a building block for many large-scale distributed applications. However, Network Address Translation gateways (NATs) cause most existing gossiping protocols to break down, as nodes cannot establish direct connections to nodes behind NATs (private nodes). In addition, most of the existing NAT traversal algorithms for establishing connectivity to private nodes rely on third party servers running at a well-known, public IP addresses. In this paper, we present Gozar, a gossip-based peer sampling service that: (i) provides uniform random samples in the presence of NATs, and (ii) enables direct connectivity to sampled nodes using a fully distributed NAT traversal service, where connection messages require only a single hop to connect to private nodes. We show in simulation that Gozar preserves the randomness properties of a gossip-based peer sampling service. We show the robustness of Gozar when a large fraction of nodes reside behind NATs and also in catastrophic failure scenarios. For example, if 80% of nodes are behind NATs, and 80% of the nodes fail, more than 92% of the remaining nodes stay connected. In addition, we compare Gozar with existing NAT-friendly gossip-based peer sampling services, Nylon and ARRG. We show that Gozar is the only system that supports one-hop NAT traversal, and its overhead is roughly half of Nylon's.
Place, publisher, year, edition, pages
2011. 1-14 p.
, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), ISSN 03029743 ; 6723
Break down, Building blockes, Catastrophic failures, Gossiping protocols, IP addresss, Large-scale distributed applications, NAT traversal, Network address translation gateways, Random sample, Randomness property, Sampling protocol, Single hop, Third parties
Other Electrical Engineering, Electronic Engineering, Information Engineering Information Science
IdentifiersURN: urn:nbn:se:kth:diva-33780DOI: 10.1007/978-3-642-21387-8_1ISI: 000306288500001ScopusID: 2-s2.0-79959993895ISBN: 978-364221386-1OAI: oai:DiVA.org:kth-33780DiVA: diva2:417514
11th IFIP WG 6.1 International Conference on Distributed Applications and Interoperable Systems, DAIS 2011; Reykjavik; Iceland; 6-9 June 2011
FunderICT - The Next Generation
QS 201409152011-05-172011-05-172014-09-15Bibliographically approved