linux – rsyslog不会将远程消息写入特定主机的日志文件

rsyslog.conf如下：

# 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)

# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514

#### GLOBAL DIRECTIVES ####
# Use default timestamp format
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat

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

# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.*                                                 /dev/console

# 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

配置文件如下：

##RSYSLOG configuration file for Remote Logs
$FileCreateMode 0640 
$template PerHostLog,"/var/log/remote/%HOSTNAME%.log"

if ($fromhost-ip startswith '10.1.5' or $fromhost-ip startswith '10.2.8') then -?PerHostLog
& ~

这些规则有什么问题吗？
TCPdump显示来自10.2.8.1主机的消息到达服务器,但syslog选择忽略它们.为什么？？