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Thread: TCP Setting for High Performance
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05-09-2010, 11:27 AM #1Web Hosting Evangelist
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TCP Setting for High Performance
Occasionally I'm seeing "possible SYN flooding on port xxx" when there no real attack going on. What I'd like to do is some Linux tuning to increase the capacity so that it can handle more TCP activity. These's so many settings that my head is swimming.
I'm also running OpenVZ virtualization in case that makes a difference.
Thanks in advance.
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05-09-2010, 04:48 PM #2Aspiring Evangelist
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This is just a warning message, the kernel should start sending SYN cookies, if they are enabled.
As long as you don't see some "dropping xx packets" messages you are fine.
Look at your SYN backlog and increase it if it is too low:
Code:# cat /proc/sys/net/ipv4/tcp_max_syn_backlog
You can do that only from the HN, not from a container.NinTechNet
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05-10-2010, 12:21 AM #3Web Hosting Evangelist
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Thanks - for spam filtering - is there any other parameters that I should adjust?
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