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The SIP Data Filter (SiDaFir) was developed as part of the SIP Trace project in the Research and Development Center for Mobile Applications (RDC) in the Department of Telecommunications of Czech Technical University in Prague supported by CESNET.

The current tool is in alpha version, very complex patterns might cause the tool to malfunction and specifically crafted messages might lead to tool instability.

More recent information can be found at the SIPDATA.ORG webpage.