Displaying 11 results from an estimated 11 matches for "tcp_timestamp".
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tcp_timestamps
2009 Jul 28
3
About the article OS_Protection by JimPerrin
Evolution (aka JimPerrin - or is this the other way around?) has been
working on this excellent wiki article:
http://wiki.centos.org/HowTos/OS_Protection
However, the discussion is taking place at his own blog site
http://www.bofh-hunter.com/ . Because this is a CentOS wiki article,
I just wonder why we cannot do it here. Sure, his blog site may
collect a wider audience, but we traditionally
2007 Oct 25
0
network question
Hi all
I have following network question and want you to help
1/ I got the "RX FCSErrors 6" from switch. (router ---link--switch----host). how can I determine it is host issue or router issue?
2/ when I use my linux as router with iptables, do i need to set 0=net.ipv4.tcp_timestamps
What parameters in kernel i need to set in linux router to have good performance in router?
3/ what is the best way to capture data for audit later as I sometimes get bandwidth drop in mrtg graph? now I only capture load from top, netstat -i every minutes in cronjob.
Thank you for your help...
2004 Mar 01
0
logs strangers...
...connect 4 access points (linksys), each
giving connection for every eth2 "C" class
Along a week I''ve changed my syslog.ctl like:
net.ipv4.ip_forward = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_low_latency = 1
net.ipv4.tcp_ecn = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4....
2013 Sep 05
0
windows guest network kept down automatically when several windows guest running in one KVM host,
...V1.0 begin ############
net.ipv4.ip_local_port_range = 32768 65000
net.core.rmem_max = 8388608
net.core.wmem_max = 8388608
net.ipv4.tcp_rmem = 4096 87380 8388608
net.ipv4.tcp_wmem = 4096 65536 8388608
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_timestamps = 0
kernel.panic = 5
vm.swappiness = 51
########### add by operation V1.0 end ############
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
#add by wdh
#net.ipv4.conf.all.proxy_arp = 1
Best Regards,
cochen
2006 Oct 30
3
Application 500 Errors
Configuration:
(2) Dual Core Opterons
8GB RAM
Apache used to balance 40 mongrel instances
We receive Application 500 Errors. Nothing suspect appears in the log, so we
are at a lost as to what to do next.
Any advice would be welcome and/or an explanation of what types of things
cause Application 500 Errors in mongrel.
Thanks!
- Jared Brown
-------------- next part --------------
An HTML
2013 Jan 04
4
CentOS 6.3 as Firewall/Router
...sys/net/ipv4/conf/all/rp_filter
#Don't respond to broadcast pings (Smurf-Amplifier-Protection)
echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
#Block source routing
echo 0 > /proc/sys/net/ipv4/conf/all/accept_source_route
#Kill timestamps
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
#Enable SYN Cookies
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
#Kill redirects
echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects
#Enable bad error message protection
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
#Log martians (packets with impossible addresses)
echo 1...
2004 Jan 07
11
Random ping jumps
...d up, server load fine. QOS isn''t used, qdiscs default.
I don''t realize what the problem is and even how to debug it. Sysctl config:
net/ipv4/ip_forward = 1
net/ipv4/icmp_ignore_bogus_error_responses = 1
net/ipv4/icmp_echo_ignore_broadcasts = 1
net/ipv4/tcp_syncookies = 1
net/ipv4/tcp_timestamps = 0
net/ipv4/tcp_window_scaling = 0
net/ipv4/tcp_sack = 0
net/ipv4/tcp_fin_timeout = 30
net/ipv4/tcp_keepalive_time = 1800
net/ipv4/tcp_low_latency = 1
Thanks for any thoughts.
_______________________________________________
LARTC mailing list / LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/mail...
2005 Jul 07
3
samba + xp "Delayed Write Failed"
...> /proc/sys/net/ipv4/tcp_tw_recycle
echo 0 > /proc/sys/net/ipv4/tcp_sack
echo 8192 > /proc/sys/net/ipv4/tcp_max_syn_backlog
echo 500000 > /proc/sys/net/ipv4/tcp_max_tw_buckets
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
Linux-Linux ftp 251000kbit/s
Linux-XP ftp 40000kbit/s
Linux-Linux smbclient 236000kbit/s (3.0.20pre1-1)
Linux-XP Explorer 22000kbit/s (3.0.20pre1-1)
Linux-XP ftp 40000kbit/s
Linux-XP winscp 35000kbit/s
Linux-XP winscp(sftp mode) 20000kbit/s
Linux-XP ping -f 55000kbit/s
Linux-Li...
2003 Feb 03
4
[Bug 40] system hangs, Availability problems, maybe conntrack bug, possible reason here.
https://bugzilla.netfilter.org/cgi-bin/bugzilla/show_bug.cgi?id=40
laforge@netfilter.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
------- Additional Comments From laforge@netfilter.org 2003-02-03 16:49 -------
We haven't seen this
2006 Dec 18
2
creating script for init.d
Hello.
I'm moving from a very old Fedora Core 1 to CentOS 4.4, what a change!!
Three year ago, I wrote some script (network related) and worked very well.
Now, I can put into init.d by means of chkconfig and I restarted the system,
but always hang when executing my srcipt (in my new centos 4.4).
There a manual for making scripts for init.d?
there is some new requirement by which it does not
2003 Dec 01
0
No subject
...0 5000 640 512 500 30000 50000 0 0
# Disk cache size
vm.buffermem = 60 10 60
# File handle limit
fs.file-max = 32768
# Inode limit
fs.inode-max = 131072
# TCP/IP time outs
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_sack = 0
net.ipv4.tcp_timestamps = 0
# Gigabit nic settings
net.core.rmem_max = 262144
net.core.wmem_max = 262144
These I placed in the sysctl.conf file (redhat 7.1 /etc/sysctl.conf )
However it ran very well as it was ...
I use KDE for most system administration but found webmin is realy great
for most things (http://www.web...