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Apart from the normal format for IPv6, it is also possible to format an IPv6 with an embedded IPv4 instead of the last two blocks. This is described in the RFC 4291 section 2.2.3, for example:::FFFF:129.144.52.38 The format is used for systems working with both IPv6 and IPv4 addresses. However, in the RFC it is […]
As I mentioned in my recent post about the mmanon rewrite, I have been working on an offline anonymization tool. It is called SLFA (short for simple log file anonymizer) and I have now finished the first usable version. SLFA is a java application that allows you to anonymize files from the command line. Currently, […]
IPv6-addresses are represented by 128 bits. This makes it possible to provide far more addresses than IPv4. However, this also causes problems when working with IPv6. In this case, I am currently working on an IPv6-anonymiation function for rsyslog. There are some systems that support an unsigned 128 bit integer when using GCC or clang […]
Currently, rsyslog’s mmanon module has the task of anonymizing ip-addresses. However, due to only being able to anonymize ipv4-addresses, I decided to overhaul the module to be able to also work with ipv6-addresses (see this feature request). In doing this, I also noticed some bugs with the ipv4-module. Now there are two options: try to […]