- <table><thead><tr><th>Matching Field</th> <th>Matching Parameter</th> <th>Logical Symbol</th> <th>Matching Content</th></tr></thead> <tbody><tr><td>IP (source IP)</td> <td>Parameters are not supported.</td> <td>ipmatch (match)<br/>ipnmatch (mismatch)</td> <td>Multiple IP addresses are separated by commas. A maximum of 20 IP addresses are allowed.</td></tr> <tr><td>IPv6 (source IPv6)</td> <td>Parameters are not supported.</td> <td>ipmatch (match)<br/>ipnmatch (mismatch)</td> <td>A single IPv6 address is supported.</td></tr> <tr><td>Referer (referer)</td> <td>Parameters are not supported.</td> <td>empty (Content is empty.)<br/>null (do not exist)<br/>eq (equal to)<br/>neq (not equal to)<br/>contains (contain)<br/>ncontains (do not contain)<br/>len_eq (length equals to)<br/>len_gt (length is greater than)<br/>len_lt (length is less than)<br/>strprefix (prefix matching)<br/>strsuffix (suffix matching)<br/>rematch (regular expression matching)</td> <td>Enter the content, with a maximum of 512 characters.</td></tr> <tr><td>URL (request path)</td> <td>Parameters are not supported.</td> <td>eq (equal to)<br/>neq (not equal to)<br/>contains (contain)<br/>ncontains (do not contain)<br/>len_eq (length equals to)<br/>len_gt (length is greater than)<br/>len_lt (length is
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