Women in Technology

Article:		Visualizing Network Traffic with Netflow and FlowScan
Subject:		Some errors in flowscan log
Date:		2006-11-28 05:05:18
From:		Aladar
Since Im not perl programer, I cant work out following problem. I have installed all required stuff for network monitoring as found in the articles. The only trouble was installing Cflow.pm. Manual install from flow-tools solve that problem (although the warning Note (probably harmless): No library found for -lnsl was displayed during manual install too. Flowdumper showed some statistics in spite of the warning) So, everything seems working fine. But, as I promised :) there is one problem (if it is ...). My flowscan.cf contains line: Verbose 1, so that all messages goes to var/log/flowscan.log. Here I can see following warning: Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684. I cant recognized importance of this message. I will be delighted if someone can help. Here are components versions: OS: FreeBSD 6.1 flowscan_1.006_7 (FlowScan.pm 1.6 flowscan executable 1.20) flow-tools_0.68_1 perl-5.8.8 rrdtool-1.2.12_1 P5-HTML-Table-2.04 softflowd-0.9.7 CUflow.pm 1.66 CUGrapher.pl 1.53

Showing messages 1 through 1 of 1.

• Some errors in flowscan log
  2007-03-20 12:28:15  virtual-Flow [View]
  
  
  Hi I am getting the same thing and I am not seeing anything in my graph except the populated legend==>>>2007/03/20 14:27:08 flowscan-1.020 CUFlow: Cflow::find took 79 wallclock secs (78.18 usr 0.14 sys + 8.80 cusr 0.25 csys = 87.37 CPU) for 4653042 flow file bytes, flow hit ratio: 34084/286707
  2007/03/20 14:27:08 flowscan-1.020 CUFlow: report took 0 wallclock secs ( 0.00 usr 0.01 sys + 0.43 cusr 0.13 csys = 0.57 CPU)
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  2007/03/20 14:27:09 working on file /opt/netflow/ft-v05.2007-03-19.100000-0500...
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684.
  Use of uninitialized value in numeric gt (>) at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Table.pm line 1684