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第八部分:配置Cyrus-SASL
1、安装cyrus-sasl
删除系统的cyrus-sasl:
# rpm -e cyrus-sasl –nodeps
安装新的支持authdaemon的软件包
# yum install cyrus-sasl
2、配置main.cf文件
Postfix的SMTP认证需要透过Cyrus-SASL,连接到authdaemon获取认证信息。
编辑main.cf
# vi /etc/postfix/main.cf
增加如下内容:
# smtpd related config
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unauth_destination,
reject_unauth_pipelining,
reject_invalid_hostname,
# SMTP sender login matching config
smtpd_sender_restrictions =
permit_mynetworks,
reject_sender_login_mismatch,
reject_authenticated_sender_login_mismatch,
reject_unauthenticated_sender_login_mismatch
smtpd_sender_login_maps =
mysql:/etc/postfix/mysql_virtual_sender_maps.cf,
mysql:/etc/postfix/mysql_virtual_alias_maps.cf
# SMTP AUTH config here
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_security_options = noanonymous
3、编辑smtpd.conf文件
# vi /usr/lib/sasl2/smtpd.conf
确保其内容为:
pwcheck_method: authdaemond
log_level: 3
mech_list: PLAIN LOGIN
authdaemond_path:/var/spool/authdaemon/socket
重新启动postfix:
# service postfix restart
4、测试SMTP认证
通过以下命令获得[email protected]的用户名及密码的BASE64编码:
# perl -e ‘use MIME::Base64; print encode_base64(“postmaster\@extmail.org”)’
内容如下:
cG9zdG1hc3RlckBleHRtYWlsLm9yZw==
# perl -e ‘use MIME::Base64; print encode_base64(“extmail”)’
内容如下:
ZXh0bWFpbA==
然后本机测试:
# telnet localhost 25
其过程如下:
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 mail.extmail.org ESMTP Postfix - by extmail.org
ehlo demo.domain.tld << 输入内容
250-mail.extmail.org
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
auth login << 输入内容
334 VXNlcm5hbWU6
cG9zdG1hc3RlckBleHRtYWlsLm9yZw== << 输入内容
334 UGFzc3dvcmQ6
ZXh0bWFpbA== << 输入内容
235 2.0.0 A uthentication successful
quit << 输入内容
221 2.0.0 Bye
最后出现235 Authentication Successful 表明认证成功了。
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