[prev in list] [next in list] [prev in thread] [next in thread] 

List:       netfilter
Subject:    resets received for embryonic SYN_RECV sockets
From:       kay <kay.diam () gmail ! com>
Date:       2012-08-31 9:08:39
Message-ID: CANaOhebiw9N1kisgAb2dAUjQFj-s_W_XhJjCDek3_7b8QMScDg () mail ! gmail ! com
[Download RAW message or body]

Dear community,

I'm new in network stack optimization and I have rather big subj value
on back end servers:

2479229 resets received for embryonic SYN_RECV sockets

I've googled for it but didn't find exact explanation of this value.
How can I catch it using tcpdump and how can I avoid it?

sysctl custom values:
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_sack = 1
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1

I have attached netstat -s. CentOS 6.2, kvm virtual machine.

P.S. Also I use ipvs + keepalived.

["netstat" (application/octet-stream)]
--
To unsubscribe from this list: send the line "unsubscribe netfilter" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[prev in list] [next in list] [prev in thread] [next in thread]