Attacks and misuses of computer systems are major concerns of our time with the growth of network-based commerce and communication. The current network infrastructure is not geared toward defeating such attacks and current textual-based analysis techniques are insufficient for the task. The authors have developed information visualization techniques based around a glyph metaphor for visually representing the textual log information collected from systems. This "visual" analysis greatly improves the comprehend ability of the information, reduces the time required for complete analysis of the information, and allows for the analysis of information that otherwise would have gone by the wayside.