The new Cisco IOS Firewall for Internet Protocol version 6 (IPv6) provides stateful inspection to both existing IPv4 and IPv6 traffic on a single interface for enhanced performance, along with better management of the IPv6 migration process.
Causes of Muscle contractions that are rare. The offical US government definition of a rare disease is one that affects 200,000 people or less. The following causes of Muscle contractions appear in the population at a rate of less than 200,000 people per year in the USA: 1  Alpers Syndrome-involuntary muscle contraction. 2  Fahr's Syndrome-athetosis. 3  Ramsay Hunt syndrome Type II-involuntary muscle contraction.
Restless legs syndrome Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them. Sciatica Sciatica is pain, numbness, weakness or tingling in the leg caused by an injury to the sciatic nerve. Vertebral compression fracture (lumbar) A vertebral compression fracture can cause pain and weakness in the lower back, upper back, neck, or hip.