| TABLE 1: Log-File Naming Conventions and Format Differences | |
| Filename | Description |
| FWSDyyyymmdd.log | Firewall Service log—ISA Server file format |
| FWSEXTDyyyymmdd.log | Firewall Service log—W3C file format |
| IPPDyyyymmdd.log | ISA Server file format |
| IPPEXTDyyyymmdd.log | IP Packet Filter log—W3C file format |
| WEBDyyyymmdd.log | Web Proxy log—ISA Server file format |
| WEBEXTDyyyymmdd.log | Web Proxy log—W3C file format |
| Format | Delimiter | Time | What Is Logged? |
| W3C format | Tab | Greenwich Mean Time (GMT) | Only selected fields |
| ISA format | , | Local system | All fields |