The DNS, as one of the oldest components of the modern Internet, has been studied multiple times. It is a known fact that operational issues such as misconfigured name servers affect the responsiveness of the DNS server which could lead to delayed responses or failed queries. One of such misconfigurations is the lame delegation and this article explains how it can be detected and also provides guidance to the African Internet community as to whether a policy lame reverse DNS should be enforced. It also gives an overview of the degree of lameness of the AFRINIC reverse domains where it was found that 45% of all reverse domains are lame.

This paper provides insight into the effects of cross-border infrastructure and logical interconnections in Africa on both intra-country and cross-border latency on end-to-end Internet paths, by comparing Internet performance measurements between different countries. We collected ICMP pings between countries using Speedchecker and applied a community detection algorithm to group countries based on round-trip times (RTTs) between countries.

We observed three main latency clusters: East and Southern Africa; North Africa; and West and Central Africa. An interesting observation is that these clusters largely correspond to countries that share the same official languages or past colonial history. The cluster in Eastern and Southern Africa is the most strongly clustered: these countries have the lowest inter-country latency values.

We also found that some countries have a much higher intra-country latency than expected, pointing to the lack of local peering or physical infrastructure within the country itself. This finding underscores the importance of physical networking infrastructure deployment and inter-network relationships at a country and regional level.

This paper specifically deals with the different policies and technical frameworks at a Regional Internet Registry (RIR) level in terms of anti-spam measures. It also exposes the issue of spam from an Internet registry perspective, as an important element of the Internet technical infrastructure. We found out that, an RIR itself is not mandated to fight spam but it maintains a registry that is of paramount importance for traceability of Internet Number Resources ownership information.

The paper starts with describing the challenges faced by operators followed by the different sources of spam. It then exposes the different mechanisms deployed by RIRs but importantly, this paper shows how those mechanisms either technical or policy-oriented are mostly underutilised, although they are operational. The latter is achieved by taking AFRINIC, the African RIR as a case study. 

Page 2 of 3