iptables logging in a separate logfile works not properly
Hello, I have the following line in iptables: iptables -A INPUT -j LOG --log-prefix "INPUT: " In syslog-ng (/etc/syslog-ng/syslog-ng.conf) I have the following config: ############################################# options { sync (0); time_reopen (10); log_fifo_size (1000); long_hostnames (off); use_dns (no); use_fqdn (no); create_dirs (no); keep_hostname (yes); }; source s_sys { file ("/proc/kmsg" log_prefix("kernel: ")); unix-stream ("/dev/log"); 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" sync(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/messages"); }; destination d_mlal { usertty("*"); }; # direct iptables logs into /var/log/firewall.log destination iptables { file("/var/log/firewall.log"); }; filter iptables { match("INPUT:"); }; log { source(s_sys); filter(iptables); destination(iptables); }; filter noiptables { not match("INPUT:"); }; log { source(s_sys); filter(noiptables); destination(d_kern); }; 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); }; ################################################################ iptables loggs to /var/log/firewall.log, but also to /var/log/messages. A line in messages is: May 29 14:13:55 hostname kernel: INPUT: IN=eth0 OUT= MAC=00:16:17:6b:34:bf:00:02:85:12:c9:40:08:00 SRC=source-ip DST=server-ip LEN=104 TOS=0x00 PREC=0x00 TTL=56 ID=38612 PROTO=TCP SPT=26787 DPT=122 WINDOW=1032 RES=0x00 ACK PSH URGP=0 What I am doing wrong. with kind regards Ralf
Hi, On Fri, 2009-05-29 at 14:15 +0200, Ralf Heidenreich wrote:
Hello,
I have the following line in iptables: iptables -A INPUT -j LOG --log-prefix "INPUT: " In syslog-ng (/etc/syslog-ng/syslog-ng.conf) I have the following config: [...] filter iptables { match("INPUT:"); }; log { source(s_sys); filter(iptables); destination(iptables); }; [...] filter f_default { level(info..emerg) and not (facility(mail) or facility(authpriv) or facility(cron)); }; [...] log { source(s_sys); filter(f_default); destination(d_mesg); };
syslog-ng do not stop the evaluation when a destination is found. And because of this and because the second log statement is matching to the line the syslog-ng store it to the message too. If you want to order the syslog-ng to stop you can use the final directive.
Hello, can you give me an example, how to use the final flag? thanks in advance. regards Ralf Szalay Attila schrieb:
Hi,
On Fri, 2009-05-29 at 14:15 +0200, Ralf Heidenreich wrote:
Hello,
I have the following line in iptables: iptables -A INPUT -j LOG --log-prefix "INPUT: " In syslog-ng (/etc/syslog-ng/syslog-ng.conf) I have the following config: [...] filter iptables { match("INPUT:"); }; log { source(s_sys); filter(iptables); destination(iptables); }; [...] filter f_default { level(info..emerg) and not (facility(mail) or facility(authpriv) or facility(cron)); }; [...] log { source(s_sys); filter(f_default); destination(d_mesg); };
syslog-ng do not stop the evaluation when a destination is found. And because of this and because the second log statement is matching to the line the syslog-ng store it to the message too.
If you want to order the syslog-ng to stop you can use the final directive.
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Hello, if I use the final flag, postfix loggs to /var/log/messages, not to /var/log/maillog. What I am doing wrong? regards ralf Here my config: options { sync (0); time_reopen (10); log_fifo_size (1000); long_hostnames (off); use_dns (no); use_fqdn (no); create_dirs (no); keep_hostname (yes); }; source s_sys { file ("/proc/kmsg" log_prefix("kernel: ")); unix-stream ("/dev/log"); internal(); # udp(ip(0.0.0.0) port(514)); }; destination iptables { file("/var/log/firewall.log"); }; filter iptables { match("INPUT:"); }; log { source(s_sys); filter(iptables); destination(iptables);flags(final); }; #log { source(s_sys); filter(iptables); destination(iptables); }; filter noiptables { not match("INPUT:"); }; log { source(s_sys); filter(noiptables); destination(d_kern); }; 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" sync(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/messages"); }; destination d_mlal { usertty("*"); }; # direct iptables logs into /var/log/firewall.log 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); }; Ralf Heidenreich schrieb:
Hello,
can you give me an example, how to use the final flag? thanks in advance.
regards Ralf
Szalay Attila schrieb:
Hi,
On Fri, 2009-05-29 at 14:15 +0200, Ralf Heidenreich wrote:
Hello,
I have the following line in iptables: iptables -A INPUT -j LOG --log-prefix "INPUT: " In syslog-ng (/etc/syslog-ng/syslog-ng.conf) I have the following config: [...] filter iptables { match("INPUT:"); }; log { source(s_sys); filter(iptables); destination(iptables); }; [...] filter f_default { level(info..emerg) and not (facility(mail) or facility(authpriv) or facility(cron)); }; [...] log { source(s_sys); filter(f_default); destination(d_mesg); }; syslog-ng do not stop the evaluation when a destination is found. And because of this and because the second log statement is matching to the line the syslog-ng store it to the message too.
If you want to order the syslog-ng to stop you can use the final directive.
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______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.campin.net/syslog-ng/faq.html
______________________________________________________________________________ Member info: https://lists.balabit.hu/mailman/listinfo/syslog-ng Documentation: http://www.balabit.com/support/documentation/?product=syslog-ng FAQ: http://www.campin.net/syslog-ng/faq.html
participants (2)
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Ralf Heidenreich
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Szalay Attila