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# -----------------------------------------------------------------------------
# tcp listen sockets issues
alarm: 1m_ipv4_tcp_listen_overflows
on: ipv4.tcplistenissues
os: linux freebsd
hosts: *
lookup: sum -60s unaligned absolute of ListenOverflows
units: overflows
every: 10s
crit: $this > 0
delay: up 0 down 5m multiplier 1.5 max 1h
info: the number of TCP listen socket overflows during the last minute
to: sysadmin
alarm: 1m_ipv4_tcp_listen_drops
on: ipv4.tcplistenissues
os: linux
hosts: *
lookup: sum -60s unaligned absolute of ListenDrops
units: drops
every: 10s
crit: $this > 0
delay: up 0 down 5m multiplier 1.5 max 1h
info: the number of TCP listen socket drops during the last minute
to: sysadmin
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