ソケットバインディングエラーと権限拒否により、syslog-ngが起動しません。

最近、久しぶりに私のコンピュータの1つを再起動しましたが、設定の変更に多くの問題が発生しました。

syslog-ng サービスは動作しなくなり、journactl で次のエラーが発生します。

-- Unit syslog-ng.service has begun starting up.
Oct 01 17:13:48 SIEM-ConnLinuxLR systemd[1]: syslog-ng.service: Got notification message from PID 18672, but reception only permitted for main PID 18670
Oct 01 17:13:48 SIEM-ConnLinuxLR syslog-ng[18670]: [2018-10-01T17:13:48.128987] WARNING: window sizing for tcp sources were changed in syslog-ng 3.3, the configuration value was divided by the value of max-con
Oct 01 17:13:48 SIEM-ConnLinuxLR syslog-ng[18670]: [2018-10-01T17:13:48.129414] Error binding socket; addr='AF_INET(0.0.0.0:515)', error='Permission denied (13)'
Oct 01 17:13:48 SIEM-ConnLinuxLR syslog-ng[18670]: [2018-10-01T17:13:48.129438] Error initializing message pipeline;
Oct 01 17:13:48 SIEM-ConnLinuxLR systemd[1]: syslog-ng.service: main process exited, code=exited, status=2/INVALIDARGUMENT
Oct 01 17:13:48 SIEM-ConnLinuxLR systemd[1]: Failed to start System Logger Daemon.
-- Subject: Unit syslog-ng.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit syslog-ng.service has failed.
--
-- The result is failed.

サービス構成は次のとおりです。

Description=System Logger Daemon
Documentation=man:syslog-ng(8)
After=network.target

[Service]
Type=notify
User=root
Group=root
ExecStart=/usr/sbin/syslog-ng -p /var/run/syslogd.pid
ExecReload=/bin/kill -HUP $MAINPID
EnvironmentFile=-/etc/syslog-ng
EnvironmentFile=-/etc/default/syslog-ng
EnvironmentFile=-/etc/sysconfig/syslog-ng
StandardOutput=journal
StandardError=journal
Restart=on-failure

[Install]
WantedBy=multi-user.target

ご覧のとおり、rootとして実行する必要がありますが、まだerror='Permission denied (13)'。/usr/sbin/syslog-ng -p /var/run/syslogd.pid

編集1：

ポート515で実行される他のプロセスはなく、前述のようにコマンドを手動で実行しようとすると正常に動作します。

syslog 構成を追加します。

@version:3.7
@include "scl.conf"

# syslog-ng configuration file.
#
# This should behave pretty much like the original syslog on RedHat. But
# it could be configured a lot smarter.
#
# See syslog-ng(8) and syslog-ng.conf(5) for more information.
#
# Note: it also sources additional configuration files (*.conf)
#       located in /etc/syslog-ng/conf.d/

options {
    flush_lines (0);
    time_reopen (10);
    log_fifo_size (1000);
    chain_hostnames (off);
    use_dns (no);
    use_fqdn (no);
    create_dirs (no);
    keep_hostname (yes);
};

source s_sys {
    system();
    internal();
    # udp(ip(0.0.0.0) port(514));
};

destination d_cons { file("/dev/console"); };
destination d_mesg { file("/var/log/messages"); };
destination d_auth { file("/var/log/secure"); };
destination d_mail { file("/var/log/maillog" flush_lines(10)); };
destination d_spol { file("/var/log/spooler"); };
destination d_boot { file("/var/log/boot.log"); };
destination d_cron { file("/var/log/cron"); };
destination d_kern { file("/var/log/kern"); };
destination d_mlal { usertty("*"); };

filter f_kernel     { facility(kern); };
filter f_default    { level(info..emerg) and
                        not (facility(mail)
                        or facility(authpriv)
                        or facility(cron)); };
filter f_auth       { facility(authpriv); };
filter f_mail       { facility(mail); };
filter f_emergency  { level(emerg); };
filter f_news       { facility(uucp) or
                        (facility(news)
                        and level(crit..emerg)); };
filter f_boot   { facility(local7); };
filter f_cron   { facility(cron); };

#log { source(s_sys); filter(f_kernel); destination(d_cons); };
log { source(s_sys); filter(f_kernel); destination(d_kern); };
log { source(s_sys); filter(f_default); destination(d_mesg); };
log { source(s_sys); filter(f_auth); destination(d_auth); };
log { source(s_sys); filter(f_mail); destination(d_mail); };
log { source(s_sys); filter(f_emergency); destination(d_mlal); };
log { source(s_sys); filter(f_news); destination(d_spol); };
log { source(s_sys); filter(f_boot); destination(d_boot); };
log { source(s_sys); filter(f_cron); destination(d_cron); };


# Source additional configuration files (.conf extension only)
@include "/etc/syslog-ng/conf.d/*.conf"

apache.confの設定

source s_net_t515 {
     network(
         transport("tcp")
         port(515)
         log-msg-size(2097152)
         max-connections(100)
     );
};

destination d_apachea { file("/opt/arcsight/logs/Apache/${HOST}.log"); };

destination d_apachee {
        file("/opt/arcsight/logs/Apache/error/${HOST}-error.log");
};

destination d_a {
        file("/opt/arcsight/logs/Apache/test.log");
};

filter f_apachea { (netmask(***.***.***.5/32) or netmask(***.***.***.6/32)) and not message('error]') and  message('.*\d+\s\d+\s\".*') ; };
filter f_apachee { (netmask(***.***.***.5/32) or netmask(***.***.***.6/32)) and message('error]'); };

log {
        source(s_net_t515);
        filter(f_apachea);
        destination(d_apachea);
};

log {
        source(s_net_t515);
        filter(f_apachee);
        destination(d_apachee);
};