error packets with syslog

From: Claus Rosenberger (Claus.Rosenberger@rocnet.de)
Date: Fri May 10 2002 - 07:59:00 EST


we use two vpn gateways with ipsec and two terminal servers behind it.

one server write syslog entries to the other subnet accross the vpn. these
packets marked as error packets in the first gateway.

TerminalServer-1
          |
Gateway-1
          |
Gateway-2
          |
Destination for Logging

TerminalServer-1 has following syslog.conf entry :

 *.* @10.2.4.6

Gateway-1 show following interface statistic, if syslog-rule is active :

eth0 Link encap:Ethernet HWaddr 00:B0:D0:68:74:3E
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:47798 errors:0 dropped:0 overruns:0 frame:0
          TX packets:336401 errors:0 dropped:0 overruns:0 carrier:0
          collisions:231 txqueuelen:100
          Interrupt:5

eth1 Link encap:Ethernet HWaddr 00:03:47:42:03:A7
          inet addr:10.1.1.1 Bcast:10.1.255.255 Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:764146 errors:509636 dropped:509636 overruns:20263
          frame:0 TX packets:45921 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:11 Memory:fe000000-fe020000

ipsec0 Link encap:Ethernet HWaddr 00:B0:D0:68:74:3E
          UP RUNNING NOARP MTU:16260 Metric:1
          RX packets:17547 errors:0 dropped:5 overruns:0 frame:0
          TX packets:17639 errors:2030 dropped:0 overruns:0 carrier:2030
          collisions:0 txqueuelen:10

if i stopped the syslog-rule on TerminalServer-1 i didn't get any error
packets. if the rule is active i got a lot of them. why ?
informations of servers :

TerminalServer-1 : RedHat 7.0 with delivered RedHat-Kernel
Gateway-1 : RedHat 7.1 with Kernel 2.4.3 and FreeSWan 1.9.

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This archive was generated by hypermail 2b29 : Tue May 14 2002 - 12:00:13 EST