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Clayton Dukes
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On Tue, Aug 17, 2010 at 2:52 PM, <syslogng@feystorm.net> wrote:

If I recall correctly its because cisco equipment doesnt terminate its log entries with newlines, so when sending via TCP, syslog-ng thinks the message is going to be continued in another packet (UDP is assumed to be 1 packet per log entry).
The only way to fix this is an ugly hack to set the timeout so that when it doesnt get a reply within a certain time, it assumes the log entry ended. but if several log entries are sent within the timeout, then they'll all be mashed together into 1 syslog-ng entry.

Sent: Tuesday, August 17, 2010 12:28:28 PM
From: Clayton Dukes <cdukes@gmail.com>
To: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu>
Subject: [syslog-ng] TCP recv bug in syslog-ng v2.09?
Hey guys,
Are there any known bugs for syslog-ng v2.09 that won't allow a cisco router to send logs over tcp?

I can see a connection established in syslog-ng.

I also see the message come in via tcpdump, but nothing in syslog-ng's output.

If I change the router from tcp to udp, messages come in as expected.

Router config:

logging source-interface Loopback0

logging 172.18.224.150

logging host 172.18.224.190 transport tcp

syslog-ng config:

source s_all {

   udp();

   tcp(ip(11.31.130.99) port(8002) max-connections(300));

   tcp(ip(172.18.224.190) port(601) max-connections(300));

};

debug output:

I commented out the line above for the other interface (11.31.130.99), restarted and this is all I see:

Syslog connection accepted; from='AF_INET(14.3.23.50:63845)', to='AF_INET(172.18.224.190:601)'

tcpdump:

14:13:46.914566 IP (tos 0x0, ttl 251, id 4303, offset 0, flags [none], proto TCP (6), length 134)

   14.3.23.50.63845 > xxx.com.601: Flags [.], seq 230:324, ack 1, win 4128, length 94

Router debug:

*Aug 17 17:34:19.772: %SYS-5-CONFIG_I: Configured from console by pnoc on vty0 (172.18.224.151)

*Aug 17 17:34:20.776: Released port 15205 in Transport Port Agent for TCP IP type 1 delay 240000

*Aug 17 17:34:20.776: TCB 0x850F9754 destroyed

*Aug 17 17:34:25.775: TCB83648E60 created

*Aug 17 17:34:25.775: TCB83648E60 setting property TCP_PID (8) 845083E4

*Aug 17 17:34:25.775: TCB83648E60 setting property TCP_NO_DELAY (1) 845083E8

*Aug 17 17:34:25.775: TCB83648E60 setting property TCP keepalive timeout (17) 845084A0

*Aug 17 17:34:25.775: TCP: Random local port generated 63845, network 1

*Aug 17 17:34:25.775: TCB83648E60 bound to 14.3.23.50.63845

*Aug 17 17:34:25.775: Reserved port 63845 in Transport Port Agent for TCP IP type 1

*Aug 17 17:34:25.775: TCP: sending SYN, seq 3300233565, ack 0

*Aug 17 17:34:25.775: TCP0: Connection to 172.18.224.190:601, advertising MSS 536

*Aug 17 17:34:25.775: TCP0: state was CLOSED -> SYNSENT [63845 -> 172.18.224.190(601)]

*Aug 17 17:34:25.779: TCP0: state was SYNSENT -> ESTAB [63845 -> 172.18.224.190(601)]

*Aug 17 17:34:25.779: TCP: tcb 83648E60 connection to 172.18.224.190:601, peer MSS 1460, MSS is 536

*Aug 17 17:34:25.779: TCB83648E60 connected to 172.18.224.190.601

*Aug 17 17:34:25.779: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host 172.18.224.190 port 601 started - reconnection

______________________________________________________________

Clayton Dukes
______________________________________________________________
______________________________________________________________________________
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