通过 TLS 的 Rsyslog

Question

我一直在尝试让 rsyslog 通过 TLS 传输，但到目前为止还没有成功。

我的配置似乎有问题，但我无法确定它。

这是我的服务器配置文件：

# rsyslog v5 configuration file

# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html

#### MODULES ####

$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imklog   # provides kernel logging support (previously done by rklogd)
$ModLoad immark  # provides --MARK-- message capability
$ModLoad imgssapi # provides GSSAPI syslog reception

# Provides TCP syslog reception
$ModLoad imtcp
$InputTCPServerRun 10514
$InputTCPServerStreamDriverMode 1 # run driver in TLS-only mode
$InputTCPServerStreamDriverAuthMode anon # client is NOT authenticated

# make gtls driver the default
$DefaultNetstreamDriver gtls

# certificate files
$DefaultNetstreamDriverCAFile /etc/pki/tls/private/ca-cert.pem
$DefaultNetstreamDriverCertFile /etc/pki/tls/private/rslserver-cert.pem
$DefaultNetstreamDriverKeyFile /etc/pki/tls/private/rslserver-key.pem

# specify senders you permit to access
$AllowedSender TCP, 127.0.0.1, 10.111.1.0/24, *.evoltek.test.com 

#add: define logfiles
## /var/log/secure
$template Auth_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.secure"
## /var/log/messages
$template Msg_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.messages"
## /var/log/maillog
$template Mail_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.maillog"
## /var/log/cron
$template Cron_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.cron"
## /var/log/spooler
$template Spool_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.spooler"
## /var/log/boot.log
$template Boot_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.boot.log"
## emergency messages "*.emerg"
$template Emerg_log,"/var/log/secure.d/%fromhost%/%$year%-%$month%.emerg"

#### GLOBAL DIRECTIVES ####

# Use default timestamp format
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat

# Include all config files in /etc/rsyslog.d/
$IncludeConfig /etc/rsyslog.d/*.conf

#### RULES ####

# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none                -?Msg_log

# The authpriv file has restricted access.
authpriv.*                                              -?Auth_log

# Log all the mail messages in one place.
mail.*                                                  -?Mail_log

# Log cron stuff
cron.*                                                  -?Cron_log

# Everybody gets emergency messages
*.emerg                                                 -?Emerg_log

# Save news errors of level crit and higher in a special file.
uucp,news.crit                                          -?Spool_log

# Save boot messages also to boot.log
local7.*                                                -?Boot_log

这是我的客户端配置文件：

# rsyslog v5 configuration file

# certificate files
$DefaultNetstreamDriverCAFile /etc/pki/tls/private/ca-cert.pem
$DefaultNetstreamDriverCertFile /etc/pki/tls/private/rslclient-cert.pem
$DefaultNetstreamDriverKeyFile /etc/pki/tls/private/rslclient-key.pem

$ModLoad imuxsock.so
$ModLoad imklog.so
$ModLoad imtcp


$DefaultNetstreamDriver gtls

$ActionSendStreamDriverAuthMode anon 
$ActionSendStreamDriverMode 1 

# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none                /var/log/messages

# The authpriv file has restricted access.
authpriv.*                                              /var/log/secure

# Log all the mail messages in one place.
mail.*                                                  -/var/log/maillog

# Log cron stuff
cron.*                                                  /var/log/cron

# Everybody gets emergency messages
*.emerg                                                 *

# Save news errors of level crit and higher in a special file.
uucp,news.crit                                          /var/log/spooler

# Save boot messages also to boot.log
local7.*                                                /var/log/boot.log

*.* @@10.111.1.151:10514

我已按照本指南创建了证书：http://kb.kristianreese.com/index.php?View =entry&EntryID=148

我的测试环境没有 FQDN，因此我将 DN 字段和 FQDN 字段留空，并填写了 IP 字段。

Answer 1

Rsyslog 5.8 和 Centos 6.9 适合我

这是视频教程： https://youtu.be/eb9GlhD8XnY

在 CA（证书颁发机构）上创建证书

sudo mkidr /etc/ssl/rsyslog/   
cd /etc/ssl/rsyslog/

安装 gnutls-utils

sudo yum install -y gnutls-utils

生成 CA 私钥（保护此密钥！）

sudo certtool --generate-privkey --outfile CA-key.pem
sudo chmod 400 CA-key.pem

生成CA公钥

sudo certtool --generate-self-signed --load-privkey CA-key.pem --outfile CA.pem

Common name: CA.EXAMPLE.COM
The certificate will expire in (days): 3650
Does the certificate belong to an authority? (Y/N): y
Will the certificate be used to sign other certificates? (Y/N): y
Will the certificate be used to sign CRLs? (y/N): y

在 CA（证书颁发机构）上创建 SERVERS 私钥

sudo certtool --generate-privkey --outfile SERVER-key.pem --bits 2048

为 SERVER 创建证书请求

sudo certtool --generate-request --load-privkey SERVER-key.pem --outfile SERVER-request.pem 

Common name: SERVER.EXAMPLE.COM

签署 SERVER 密钥并允许其他服务器信任该密钥对

sudo certtool --generate-certificate --load-request SERVER-request.pem --outfile SERVER-cert.pem --load-ca-certificate CA.pem --load-ca-privkey CA-key.pem

The certificate will expire in (days): 1000
Is this a TLS web client certificate? (Y/N): y
Is this also a TLS web server certificate? (y/N): y
Enter a dnsName of the subject of the certificate: SERVER.EXAMPLE.COM

在 CA（证书颁发机构）上创建 CLIENT 私钥

sudo certtool --generate-privkey --outfile CLIENT-key.pem --bits 2048

为客户端创建证书请求

sudo certtool --generate-request --load-privkey CLIENT-key.pem --outfile CLIENT-request.pem 

Common name: CLIENT.EXAMPLE.ORG

签署 CLIENT 密钥并允许其他服务器信任该密钥对

sudo certtool --generate-certificate --load-request CLIENT-request.pem --outfile CLIENT-cert.pem --load-ca-certificate CA.pem --load-ca-privkey CA-key.pem

The certificate will expire in (days): 1000
Is this a TLS web client certificate? (Y/N): y
Is this also a TLS web server certificate? (y/N): y
Enter a dnsName of the subject of the certificate: CLIENT.EXAMPLE.ORG

删除请求键

sudo rm *-request.pem

scp SERVER private/key 和 CA.pem 到 SERVER.EXAMPLE.COM 使用 scp 或 USB 加密复制证书

sudo -u root scp -i ~/.ssh/id_rsa CA.pem SERVER-* root@172.16.9.30:/etc/ssl/rsyslog/

scp CLIENT private/key 和 CA.pem 到 CLIENT.EXAMPLE.COM

sudo -u root scp -i ~/.ssh/id_rsa CA.pem CLIENT-* root@172.16.9.40:/etc/ssl/rsyslog/

在SERVER和CLIENT上安装gtls驱动

sudo yum install rsyslog-gnutls -y

配置服务器

sudo vi /etc/rsyslog.d/rsyslog-tls.conf

# Add
# Listen for TCP
$ModLoad imtcp
# Set gtls driver
$DefaultNetstreamDriver gtls
# Certs
$DefaultNetstreamDriverCAFile /etc/ssl/rsyslog/CA.pem
$DefaultNetstreamDriverCertFile /etc/ssl/rsyslog/SERVER-cert.pem
$DefaultNetstreamDriverKeyFile /etc/ssl/rsyslog/SERVER-key.pem
# Auth mode
$InputTCPServerStreamDriverAuthMode x509/name
# Only allow EXAMPLE.COM domain
$InputTCPServerStreamDriverPermittedPeer *.EXAMPLE.COM
# Only use TLS
$InputTCPServerStreamDriverMode 1 
# Listen on port 6514
# If you want to use other port configure selinux
$InputTCPServerRun 6514

在防火墙上打开端口 6514

sudo vi /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 6514 -j ACCEPT

sudo /etc/init.d/iptables reload

重新启动 rsyslog 守护进程

sudo /etc/init.d/rsyslog restart

配置客户端

sudo vi /etc/rsyslog.d/rsyslog-tls.conf

# Add
# Set gtls driver
$DefaultNetstreamDriver gtls
# Certs
$DefaultNetstreamDriverCAFile /etc/ssl/rsyslog/CA.pem
$DefaultNetstreamDriverCertFile /etc/ssl/rsyslog/CLIENT-cert.pem
$DefaultNetstreamDriverKeyFile /etc/ssl/rsyslog/CLIENT-key.pem
# Auth mode
$ActionSendStreamDriverAuthMode x509/name
# Only send log to SERVER.EXAMPLE.COM host
$ActionSendStreamDriverPermittedPeer SERVER.EXAMPLE.COM
# Only use TLS
$ActionSendStreamDriverMode 1
# Forward everithing to SERVER.EXAMPLE.COM
# If you use hostnames instead of IP configure DNS or /etc/hosts
*.* @@SERVER.EXAMPLE.COM:6514

重新启动 rsyslog 守护进程

sudo /etc/init.d/rsyslog restart

要在服务器上进行测试，请运行 tcpdump 并从客户端发送日志

sudo yum install tcpdump -y
sudo tcpdump -i eth0 tcp port 6514 -X -s 0 -nn