Syslog 서비스를 시작할 수 없습니다

RasperryPi Debian Jessie에 syslog-ng 3.5를 설치했습니다. 서비스를 시작하려고 하면 실패합니다.

-- Unit syslog.socket has begun starting up.
Feb 10 12:29:28 blackbox systemd[1]: Socket service syslog.service not loaded, r
Feb 10 12:29:28 blackbox systemd[1]: Failed to listen on Syslog Socket.
-- Subject: Unit syslog.socket has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit syslog.socket has failed.
--
-- The result is failed.
Feb 10 12:29:28 blackbox systemd[1]: Starting System Logger Daemon...
-- Subject: Unit syslog-ng.service has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit syslog-ng.service has begun starting up.
Feb 10 12:29:29 blackbox systemd[1]: Started System Logger Daemon.
-- Subject: Unit syslog-ng.service has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit syslog-ng.service has finished starting up.
--
-- The start-up result is done.

netstat를 확인했는데 포트 514가 다른 프로세스에서 사용되지 않습니다. 이전 버전에서 잘 작동했던 구성은 다음과 같습니다.

source s_net { udp(ip(0.0.0.0) port(514)); };
destination d_cisco { file(“/var/log/cisco/cisco.log”); };
log { source(s_net); destination(d_cisco); };

수동으로 실행하려고 하면 다음과 같습니다.

root@blackbox:~# /usr/sbin/syslog-ng -d

Running application hooks; hook='1'
Running application hooks; hook='3'
syslog-ng starting up; version='3.5.6'
Incoming log entry; line='<164>Feb 10 2016 15:03:59: %PIX-4-400037: IDS:6053 DNS all records request from 5.172.120.51 to 192.168.0.3 on interface outside\x0a'
Error opening file for writing; filename='\xe2\x80\x9c/var/log/cisco/cisco.log\xe2\x80\x9d', error='No such file or directory (2)'
Incoming log entry; line='<164>Feb 10 2016 15:04:03: %PIX-4-400037: IDS:6053 DNS all records request from 5.172.120.51 to 192.168.0.3 on interface outside\x0a'
Error opening file for writing; filename='\xe2\x80\x9c/var/log/cisco/cisco.log\xe2\x80\x9d', error='No such file or directory (2)'
Incoming log entry; line='<164>Feb 10 2016 15:04:07: %PIX-4-400037: IDS:6053 DNS all records request from 5.172.120.51 to 192.168.0.3 on interface outside\x0a'
Error opening file for writing; filename='\xe2\x80\x9c/var/log/cisco/cisco.log\xe2\x80\x9d', error='No such file or directory (2)'
Incoming log entry; line='<164>Feb 10 2016 15:04:07: %PIX-4-400011: IDS:2001 ICMP unreachable from 198.48.92.104 to 192.168.0.3 on interface outside\x0a'
Error opening file for writing; filename='\xe2\x80\x9c/var/log/cisco/cisco.log\xe2\x80\x9d', error='No such file or directory (2)'
Incoming log entry; line='<164>Feb 10 2016 15:04:07: %PIX-4-313005: No matching connection for ICMP error message: icmp src outside:198.48.92.104 dst inside:192.168.0.3 (type 3, code 3) on outside interface.  Original IP payload: udp src 192.168.0.3/53 dst 198.48.92.104/17106.\x0a'
Error opening file for writing; filename='\xe2\x80\x9c/var/log/cisco/cisco.log\xe2\x80\x9d', error='No such file or directory (2)'
^Csyslog-ng shutting down; version='3.5.6'
Running application hooks; hook='4'

root@blackbox:~# cd /var/log/cisco/
root@blackbox:/var/log/cisco# ls -l
total 0
-rwxrw-rw- 1 root root 0 Feb 10 11:43 cisco.log
root@blackbox:/var/log/cisco#