Following this guide: http://gentoo-wiki.com/HOWTO_TCP_Tuning But I'm getting these errors. error: "net.ipv4.tcp_syncookies" is an unknown key (This isn't in the guide, but as I was working with this I came across a link about syn_cookies being disabled default.) It seems this value is wrong. These, however, are in the guide and are listed when I do a 'sysctl -a', though I can't seem to set them. error: "Invalid argument" setting key "net.core.rmem_max" error: "Invalid argument" setting key "net.core.wmem_max" error: "Invalid argument" setting key "net.ipv4.tcp_rmem" error: "Invalid argument" setting key "net.ipv4.tcp_wmem" My current sysctc.conf looks like this (at the end, with the relevant changes). net.core.rmem_max="16777216" # This setting changes the maximum network receive buffer size to 16777216 bytes. net.core.wmem_max="16777216" # The same thing for the send buffer net.ipv4.tcp_rmem="4096 87380 16777216" # This sets the kernel's minimum, default, and maximum TCP receive buffer sizes. You might be surprised, seeing the maximum of 16M, # that many Unix-like operating systems still have a maximum of 256K! net.ipv4.tcp_wmem="4096 65536 16777216" # A similar setting for the TCP send buffer. Note that the default value is a little lower. Don't worry about this, # the send buffer size is less important than the receive buffer. net.ipv4.tcp_no_metrics_save=1 # This removes an odd behavior in the 2.6 kernels, whereby the kernel stores the slow start threshold for a client between TCP sessions. # This can cause undesired results, as a single period of congestion can affect many subsequent connections. I recommend that you disable it. net.ipv4.ip_default_ttl = 73 # Many attackers use the TTL (time to live) as a parameter for profiling your operating system. The last two settings work just fine.
This has nothing to do w/ security.
Gentoo does not maintain gentoo-wiki.com nor review its contents for accuracy. And Gentoo Bugzilla is not a support forum.
