my $re_asalog = qr{
  ^
  (.{15}) # $1 timestamp
  \s
  
  (\S+)   # $2 firewall
  \s
  (\S+)   # $3 part firewall
  access-list
  \s+
  (\S+) # $4 source acl
  \s+
  (\S+) # $5 action
  ...
}xm;