Hello all, I am receiving the following syslog line from one of devices. <134>1 1588062776.725141502 C0493 flows allow src=10.0.31.145 dst=9.9.9.9 Mac=F1:37:59:38:BA:F8 protocol=udp sport=50307 dport=53 This line contains a version filed immediately following the priority, and then timestamp is in epoch format as against ISO8601 or other standard format. I see the following error in syslog-ng log: [2020-04-28T10:46:15.340911] Outgoing message; message='Apr 28 10:46:15 ip-172-31-240-95 syslog-ng[27873]: Error processing log message: <134>1>@< 1588062776.725141502 C0493 flows allow src=10.0.31.145 dst=9.9.9.9 mac=F1:37:59:38:BA:F8 protocol=udp sport=50307 dport=53' What could be the possible issue here? My config is as follows: ##======================================== ######################## # Global options ######################## options {keep_hostname (yes); use_dns (no); mark-freq(30);}; ######################## # Sources ######################## source s_syslog { syslog( transport(udp) port(514) max-connections(500) ); }; ######################## # Destinations ######################## destination d_file { file("/var/log/dump.log"); }; ######################## # Log paths ######################## log { source(s_syslog); destination(d_file); flags(flow-control); }; ##======================================== If I check my file /var/log/dump.log, I see that the error line is getting written to it too. root@ip-172-31-240-95:~# tail -f /var/log/dump.log | grep "Error processing" Apr 28 10:44:46 ip-172-31-240-95 syslog-ng[27873]: Error processing log message: <134>1>@< 1588062776.725141502 C0493 flows allow src=10.0.31.145 dst=9.9.9.9 mac=F1:37:59:38:BA:F8 protocol=udp sport=50307 dport=53 Apr 28 10:46:15 ip-172-31-240-95 syslog-ng[27873]: Error processing log message: <134>1>@< 1588062776.725141502 C0493 flows allow src=10.0.31.145 dst=9.9.9.9 mac=F1:37:59:38:BA:F8 protocol=udp sport=50307 dport=53 Thanks Raghu