bukkake# sysctl -a | egrep -i '(syn|ack|timeout|lifetime)'
kern.usrstack: 3217031168
kern.cam.da.default_timeout: 60
kern.elf32.fallback_brand: -1
kern.init_shutdown_timeout: 120
kern.stackprot: 7
     syncache     1     8K       -        1
kern.fallback_elf_brand: -1
kern.kstack_pages: 2
kern.sync_on_panic: 0
kern.rpc.timeouts: 0
vm.swap_async_max: 4
sackhole:         20,        0,      0,    169,       39
syncache:        100,    15366,     24,    405,     4307
mbuf_packet:     256,        0,    511,    134,  1053985
vm.msync_flush_flags: 3
vm.old_msync: 0
vfs.nfs4.access_cache_timeout: 60
vfs.nfs.bufpackets: 4
vfs.nfs.access_cache_timeout: 60
vfs.nfsrv.async: 0
vfs.ffs.doasyncfree: 1
net.inet.ip.fragpackets: 0
net.inet.ip.maxfragsperpacket: 16
net.inet.ip.maxfragpackets: 800
net.inet.ip.fw.dyn_short_lifetime: 5
net.inet.ip.fw.dyn_udp_lifetime: 10
net.inet.ip.fw.dyn_rst_lifetime: 1
net.inet.ip.fw.dyn_fin_lifetime: 1
net.inet.ip.fw.dyn_syn_lifetime: 20
net.inet.ip.fw.dyn_ack_lifetime: 300
net.inet.tcp.delacktime: 100
net.inet.tcp.blackhole: 0
net.inet.tcp.delayed_ack: 1
net.inet.tcp.sack.enable: 1
net.inet.tcp.sack.maxholes: 128
net.inet.tcp.sack.globalmaxholes: 65536
net.inet.tcp.sack.globalholes: 0
net.inet.tcp.syncookies: 1
net.inet.tcp.syncache.bucketlimit: 30
net.inet.tcp.syncache.cachelimit: 15359
net.inet.tcp.syncache.count: 24
net.inet.tcp.syncache.hashsize: 512
net.inet.tcp.syncache.rexmtlimit: 3
net.inet.udp.blackhole: 0
net.link.ether.inet.useloopback: 1
net.inet6.ip6.maxfragpackets: 6400
net.inet6.icmp6.redirtimeout: 600
net.inet6.icmp6.nd6_useloopback: 1
debug.sync_limit_hit: 0
hw.ath.hal.swba_backoff: 0
hw.ste.rxsyncs: 0
hw.psm.tap_timeout: 125000
p1003_1b.asynchronous_io: 0
p1003_1b.fsync: 0
p1003_1b.synchronized_io: 0