'Syncookies' feature effects to generate new ISN/random with RST

[Brahmanand Reddy]

Dear Experts,

Recently i observed in 11.0 FreeBsd Kernel. new ISN random generating
every 15 seconds. RST not happens quickly.

if disable net.inet.tcp.syncookies=0 on syscntrl.conf .. RST happens
quickly and generate new ISN numnber for next SYN requests.

https://github.com/freebsd/freebsd/blob/master/sys/netinet/tcp_syncache.c#L1882

Could you please confirm its expected behavior about delay. have notified
this issue, we have any patch please share.

Thanks in Advance,
Brahma
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[Brahmanand Reddy]

Dear Experts,

Kindly respond about below query and let me know any info required.


Thanks and regards,
Brahma

On Sat, Feb 3, 2018 at 7:17 PM, Brahmanand Reddy <brahm...@gmail.com>
wrote: