On 4/19/13 5:54 PM, C. L. Martinez wrote:
On Fri, Apr 19, 2013 at 9:22 AM, C. L. Martinez <carlopm...@gmail.com>wrote:
On Fri, Apr 19, 2013 at 7:11 AM, C. L. Martinez <carlopm...@gmail.com>wrote:
Hi all,
I have a strange problem with my FreeBSD 9.1 (fully patched): I loose
ssh sessions from time to time frequently.
This fbsd box is installed in an ESXi 5.1 server and I have another
three fbsd 9.1 in the same ESXi host that do not have this problem, but
maybe the problem is with my sysctl.conf and loader.conf settings:
sysctl.conf
# $FreeBSD: release/9.1.0/etc/sysctl.conf 112200 2003-03-13 18:43:50Z mux
$
#
# This file is read when going to multi-user and its contents piped thru
# ``sysctl'' to adjust kernel values. ``man 5 sysctl.conf'' for details.
#
# Uncomment this to prevent users from seeing information about processes
that
# are being run under another UID.
security.bsd.see_other_uids=0
security.bsd.see_other_gids=0
# Refresh arp table entries in 2 minutes
net.link.ether.inet.max_age=120
# Drop tcp/udp packets destined for closed ports
net.inet.tcp.blackhole=2
net.inet.udp.blackhole=1
# Use the H-TCP congestion control algorithm which is more aggressive
##net.inet.tcp.cc.algorithm=htcp
# Host cache is used to cache connection details and metrics
##net.inet.tcp.hostcache.expire=5400
# Maximum segment size (MSS) specifies the largest amount of data in a
single TCP segment
net.inet.tcp.mssdflt=1440
# Make sure time stamps are enabled for slowstart_flightsize
net.inet.tcp.rfc1323=1
# Make sure rfc3390 is DISABLED so the slowstart flightsize values are
used.
net.inet.tcp.rfc3390=0
# Size of the TCP transmit and receive buffer.
net.inet.tcp.sendspace=262144
# Increase auto-tuning TCP step size of the TCP transmit and receive
buffers.
net.inet.tcp.recvbuf_inc=524288
# Somaxconn is the buffer or backlog queue depth for accepting new TCP
connections.
kern.ipc.somaxconn=1024
# Reduce the amount of SYN/ACKs we will _retransmit_ to an unresponsive
initial connection.
net.inet.tcp.syncache.rexmtlimit=1
# Spoofed packet attacks may be used to overload the kernel route cache.
net.inet.ip.rtexpire=60
net.inet.ip.rtminexpire=2
net.inet.ip.rtmaxcache=1024
loader.conf:
##############################################################
### Loader settings ########################################
##############################################################
autoboot_delay="5"
beastie_disable="YES"
##############################################################
### Kernel tunables ########################################
##############################################################
kern.maxfiles="25000"
kern.ipc.nmbclusters="32768"
net.inet.tcp.syncache.hashsize="1024"
net.inet.tcp.syncache.bucketlimit="100"
net.inet.tcp.tcbhashsize="4096"
##############################################################
### Hardware tunables ######################################
##############################################################
hw.pci.enable_msi="0"
hw.pci.enable_msix="0"
##############################################################
### Networking modules #####################################
##############################################################
cc_htcp_load="YES"
##############################################################
### Other modules ##########################################
##############################################################
aio_load="YES"
How can I debug where is the problem??
More info when I try to connect with PuTTY from a windows desktop appears
the following error:
Network error: Software caused connection abort.
... and pf is disabled (ipfw and ipfilter, too).
More info: I have intermittent failures with sendmail:
/var/spool/mqueue (1 request)
-----Q-ID----- --Size-- -----Q-Time-----
------------Sender/Recipient-----------
r3J9o54G022686 243 Fri Apr 19 09:50 <r...@domain.com>
(reply: read error from [10.196.0.100])
sus...@domain.com
Total requests: 1
It is really strange ...
are you sure you do not have another virtual machine with the same
address? (LL or IP)
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