IronPort - advanced configuration guide

More documents

Recommendations

Info

SPF-Passed Rule 6-36 } else { } if(spf-status("pra") == "SoftFail"){ } if (spf-status("mailfrom") == "Fail" } or spf-status("mailfrom") == "SoftFail"){ # malicious mail, but tempting quarantine("Policy"); stamp-mail-with-spf-verification-error: . if (spf-status("pra") == "PermError, TempError" or spf-status("mailfrom") == "PermError, TempError" or spf-status("helo") == "PermError, TempError"){ # permanent error - stamp message subject strip-header("Subject"); Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide Chapter 6 Using Message Filters to Enforce Email Policies insert-header("Subject", "[POTENTIAL PHISHING] $Subject"); } The following example shows an spf-passed rule used to quarantine emails that are not marked as spf-passed: quarantine-spf-unauthorized-mail: if (not spf-passed) { } quarantine("Policy"); OL-25137-01
Chapter 6 Using Message Filters to Enforce Email Policies OL-25137-01 Note Unlike the spf-status rule, the spf-passed rule reduces the SPF/SIDF verification values to a simple Boolean. The following verification results are treated as not passed in the spf-passed rule: None, Neutral, Softfail, TempError, PermError, and Fail. To perform actions on messages based on more granular results, use the spf-status rule. Workqueue-count Rule The workqueue-count rule checks the workqueue-count against a specified value. All the comparison operators are allowed, such as >, ==, 1000) { } skip-spamcheck(); For more information on SPF/SIDF, see Overview of SPF and SIDF Verification, page 5-22. SMTP Authenticated User Match Rule If your Cisco IronPort appliance uses SMTP authentication to send messages, the smtp-auth-id-matches ( [, ])rule can check a message’s headers and Envelope Sender against the sender’s SMTP authenticated user ID to identify outgoing messages with spoofed headers. This filter allows the system to quarantine or block potentially spoofed messages. The smtp-auth-id-matches rule compares the SMTP authenticated ID against the following targets: Target Description *EnvelopeFrom Compares the address of the Envelope Sender (also known as MAIL FROM) in the SMTP conversation *FromAddress Compares the addresses parsed out of the From header. Since multiple addresses are permitted in the From: header, only one has to match. *Sender Compares the address specified in the Sender header. *Any Matches messages that were created during an authenticated SMTP session regardless of identity. *None Matches messages that were not created during an authenticated SMTP session. This is useful when authentication is optional (preferred). The filter performs matches loosely. It is not case-sensitive. If the optional sieve-char parameter is supplied, the last portion of an address that follows the specified character will be ignored for the purposes of comparison. For example, if the + character is included as a parameter, the filter ignores the portion of the address joe+folder@example.com that follows the + character. If the address was Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide 6-37
Page 1 and 2:
Cisco IronPort AsyncOS 7.6 for Emai
Page 3 and 4:
OL-25137-01 Preface xvii Before you
Page 5 and 6:
OL-25137-01 Deleting Entries from t
Page 7 and 8:
OL-25137-01 Configuring Global Sett
Page 9 and 10:
OL-25137-01 DomainKeys and DKIM Sig
Page 11 and 12:
OL-25137-01 Valid Rule 6-20 Subject
Page 13 and 14:
OL-25137-01 Viewing Non-ASCII Chara
Page 15 and 16:
OL-25137-01 Administering a Cluster
Page 17 and 18:
OL-25137-01 Preface The Cisco IronP
Page 19 and 20:
Typographic Conventions Typeface or
Page 21 and 22:
OL-25137-01 Customizing Listeners C
Page 23 and 24:
Chapter 1 Customizing Listeners OL-
Page 25 and 26:
Page 27 and 28:
Chapter 1 Customizing Listeners Con
Page 29 and 30:
Chapter 1 Customizing Listeners Loo
Page 31 and 32:
Chapter 1 Customizing Listeners Par
Page 33 and 34:
Chapter 1 Customizing Listeners Rou
Page 35 and 36:
Chapter 1 Customizing Listeners Adv
Page 37 and 38:
Chapter 1 Customizing Listeners Tim
Page 39 and 40:
Chapter 1 Customizing Listeners Inj
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Chapter 1 Customizing Listeners Ena
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
OL-25137-01 CHAPTER 2 Configuring R
Page 61 and 62:
Chapter 2 Configuring Routing and D
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Overview OL-25137-01 LDAP Queries C
Page 137 and 138:
Chapter 3 LDAP Queries Understandin
Page 139 and 140:
Chapter 3 LDAP Queries OL-25137-01
Page 141 and 142:
Chapter 3 LDAP Queries Configuring
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Chapter 3 LDAP Queries LDAP Query S
Page 149 and 150:
Page 151 and 152:
Chapter 3 LDAP Queries Testing LDAP
Page 153 and 154:
Chapter 3 LDAP Queries Sample Accep
Page 155 and 156:
Chapter 3 LDAP Queries Sample Masqu
Page 157 and 158:
Page 159 and 160:
Chapter 3 LDAP Queries Example: Usi
Page 161 and 162:
Page 163 and 164:
Chapter 3 LDAP Queries Directory Ha
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Chapter 3 LDAP Queries Spam Quarant
Page 179 and 180:
Chapter 3 LDAP Queries Sample Activ
Page 181 and 182:
Page 183 and 184:
OL-25137-01 CHAPTER 4 Validating Re
Page 185 and 186:
Chapter 4 Validating Recipients Usi
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
OL-25137-01 Email Authentication CH
Page 195 and 196:
Chapter 5 Email Authentication Doma
Page 197 and 198:
Chapter 5 Email Authentication Publ
Page 199 and 200:
Chapter 5 Email Authentication OL-2
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Chapter 5 Email Authentication Expo
Page 213 and 214: Chapter 5 Email Authentication Conf
Page 215 and 216: Chapter 5 Email Authentication Test
Page 217 and 218: Chapter 5 Email Authentication OL-2
Page 223 and 224: Chapter 5 Email Authentication Dete
Page 227 and 228: Chapter 5 Email Authentication Grea
Page 229 and 230: Overview OL-25137-01 CHAPTER 6 Usin
Page 231 and 232: Chapter 6 Using Message Filters to
Page 263: Chapter 6 Using Message Filters to
Page 315 and 316:
Chapter 6 Using Message Filters to
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Page 327 and 328:
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
OL-25137-01 CHAPTER Advanced Networ
Page 335 and 336:
Chapter 7 Advanced Network Configur
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
Page 347 and 348:
Page 349 and 350:
Page 351 and 352:
Page 353 and 354:
OL-25137-01 Centralized Management
Page 355 and 356:
Chapter 8 Centralized Management Fi
Page 357 and 358:
Chapter 8 Centralized Management OL
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Chapter 8 Centralized Management Le
Page 367 and 368:
Chapter 8 Centralized Management Ne
Page 369 and 370:
Page 371 and 372:
Chapter 8 Centralized Management Cl
Page 373 and 374:
Chapter 8 Centralized Management Di
Page 375 and 376:
Page 377 and 378:
Page 379 and 380:
Page 381 and 382:
Page 383 and 384:
OL-25137-01 AsyncOS Quick Reference
Page 385 and 386:
Appendix A AsyncOS Quick Reference
Page 387 and 388:
FTP Access OL-25137-01 Accessing th
Page 389 and 390:
Appendix B Accessing the Appliance
Page 391 and 392:
Appendix B Accessing the Appliance
Page 393 and 394:
Symbols /dev/null, in alias tables
Page 395 and 396:
overview 2-28 domain profile deleti
Page 397 and 398:
loose SMTP address parsing 1-9 malf
Page 399 and 400:
scanning images 6-67 scp command B-
show all

IronPort - advanced configuration guide

Create successful ePaper yourself

Delete template?

Save as template?