doc:appunti:linux:sa:rspamd_spamassassin
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| doc:appunti:linux:sa:rspamd_spamassassin [2023/11/16 12:21] – [Customize the score] niccolo | doc:appunti:linux:sa:rspamd_spamassassin [2024/01/26 15:22] – [ClamAV on TCP socket in Debian 12] niccolo | ||
|---|---|---|---|
| Line 256: | Line 256: | ||
| </ | </ | ||
| - | Local configuration must go into **local.d/ | + | Local configuration must go into **local.d/ |
| < | < | ||
| - | rules { | + | # Map containing additional IPv4/IPv6 addresses/ |
| - | "RCVD_IN_DNSWL" { | + | # be excluded from checks where exclude_local is true (the default). |
| - | enabled = false; | + | local_exclude_ip_map = " |
| + | |||
| + | # Add a custom RBL. | ||
| + | rbls { | ||
| + | | ||
| + | # Checks to enable for this RBL. | ||
| + | # from: the sending IP that sent the message. | ||
| + | checks = ["from"]; | ||
| + | # Address used for RBL-testing. | ||
| + | rbl = " | ||
| + | ipv4 = true; | ||
| + | ipv6 = true; | ||
| + | exclude_local = true; | ||
| + | local_exclude_ip_map = "${LOCAL_CONFDIR}/ | ||
| + | | ||
| + | symbol = " | ||
| + | returncodes = { | ||
| + | # Apply a specific symbol instead of the generic one. | ||
| + | " | ||
| + | " | ||
| + | " | ||
| + | } | ||
| + | } | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | The file pointed by the **local_exclude_ip_map** option can be updated (adding or removing IP addresses or subnets) without the need to reload any service. | ||
| + | |||
| + | A custom score can be defined into **local.d/ | ||
| + | |||
| + | < | ||
| + | symbols = { | ||
| + | " | ||
| + | weight = 6.2; | ||
| + | description = "From address is listed in ZEN Rigacci.Org"; | ||
| + | groups = [" | ||
| + | } | ||
| + | } | ||
| + | |||
| + | symbols = { | ||
| + | " | ||
| + | weight = 6.8; | ||
| + | description = "From address is listed in ZEN Rigacci.Org, | ||
| + | groups = [" | ||
| + | } | ||
| + | } | ||
| + | </ | ||
| + | |||
| + | Several RBLs are enabled per default in the Debian 12 install. if you want to disable some, just add the symbol into the **rbls** list with the option **enabled = false**: | ||
| + | |||
| + | < | ||
| + | rbls { | ||
| + | dnswl { | ||
| + | symbol = " | ||
| + | | ||
| } | } | ||
| } | } | ||
| Line 273: | Line 327: | ||
| # local.d/ | # local.d/ | ||
| clamav { | clamav { | ||
| + | # The antivirus engine to use. | ||
| + | type = " | ||
| + | servers = " | ||
| # If set, force this action if any virus is found (default unset: no action is forced). | # If set, force this action if any virus is found (default unset: no action is forced). | ||
| - | | + | action = "reject"; |
| + | message = ' | ||
| # If `max_size` is set, messages > n bytes in size are not scanned | # If `max_size` is set, messages > n bytes in size are not scanned | ||
| - | # symbol to add (add it to metric if you want non-zero weight) | ||
| - | symbol = " | ||
| max_size = 20000000; | max_size = 20000000; | ||
| - | | + | |
| - | | + | |
| + | symbol | ||
| # Prefix used for caching in Redis: scanner-specific defaults are used. | # Prefix used for caching in Redis: scanner-specific defaults are used. | ||
| # If Redis is enabled and multiple scanners of the same type are present, | # If Redis is enabled and multiple scanners of the same type are present, | ||
| Line 294: | Line 351: | ||
| } | } | ||
| </ | </ | ||
| + | |||
| + | If the **action** option is not set, the action based on the overall SPAM score is taken. In the example above we forced the //reject// action and using the **message** option we will create a specific SMTP 554 5.7.1 message for the virus found case. | ||
| **NOTICE**: The optional section **patterns**: | **NOTICE**: The optional section **patterns**: | ||
| Line 334: | Line 393: | ||
| </ | </ | ||
| - | As you can see from the log below, an SPF fail does not trigger a significative SPAM score using the default metrics: only 0.90/18.00: | + | The '' |
| < | < | ||
| Line 342: | Line 401: | ||
| (default: F (no action): [0.90/ | (default: F (no action): [0.90/ | ||
| MIME_GOOD(-0.10){text/ | MIME_GOOD(-0.10){text/ | ||
| - | ipnet: | + | ipnet: |
| FROM_EQ_ENVFROM(0.00){}, | FROM_EQ_ENVFROM(0.00){}, | ||
| RCPT_COUNT_ONE(0.00){1; | RCPT_COUNT_ONE(0.00){1; | ||
| Line 481: | Line 540: | ||
| ^ add_header | ^ add_header | ||
| ^ rewrite_subject | ^ rewrite_subject | ||
| - | ^ soft reject | + | ^ soft reject |
| ^ reject | ^ reject | ||
| Line 563: | Line 622: | ||
| X-Rspamd-Action: | X-Rspamd-Action: | ||
| </ | </ | ||
| + | |||
| + | With the following example we add a custom **X-Virus** header if a symbol was added, e.g. by the antivirus module. In this case the antivirus module should not apply its own //reject// action, otherwise it is pointless to mangle the headers. | ||
| + | |||
| + | < | ||
| + | # Add the X-Spamd-Result header and others to all the messages. | ||
| + | use = [" | ||
| + | |||
| + | # Implies X-Spamd-Result and add X-Rspamd-Queue-Id, | ||
| + | extended_spam_headers = true; | ||
| + | |||
| + | # Special routine to add custon a X-Virus header upon specific symbols. | ||
| + | routines { | ||
| + | x-virus { | ||
| + | header = " | ||
| + | remove = 0; | ||
| + | # The following setting is an empty list by default and required to be set. | ||
| + | # These are user-defined symbols added by the antivirus module. | ||
| + | symbols = [" | ||
| + | } | ||
| + | } | ||
| + | </ | ||
| + | |||
| ===== Logging ===== | ===== Logging ===== | ||
| - | Example to enable logging | + | Example to enable logging |
| < | < | ||
| - | debug_modules = [" | + | debug_modules = [" |
| </ | </ | ||
| Line 593: | Line 674: | ||
| < | < | ||
| systemctl daemon-reload | systemctl daemon-reload | ||
| + | systemctl restart clamav-daemon.socket | ||
| systemctl restart clamav-daemon.service | systemctl restart clamav-daemon.service | ||
| </ | </ | ||
doc/appunti/linux/sa/rspamd_spamassassin.txt · Last modified: 2024/07/17 18:23 by niccolo