In my mail server I'm getting high TCP reset send between working hours, as shown in this grafic:
This is a capture of the server traffic filter by tcp-rst:
When I run "netstat -i" I get this:
Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 1500 0 3169579734 0 30 0 2277279957 0 0 0 BMRU lo 65536 0 2035030 0 0 0 2035030 0 0 0 LRU
At the same time of this TCP resets, the "Average load" of the server get up to 150-200, it is possible that this high load be related to those TCP RST? Also, how can I investigate the source of this resets in Linux?