How to check for shock absorber leaks

While checking over Forrester Gump Lachlan from Kashy shows us how he identified the culprit from our suspension knocking noise.
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Watch the full vid here
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[@Samshyam123]

My Honda crv shocks are very hard . It’s 10 years old now. Should I change it? No leaks are visible

[@Sophiahatzi]

I don't understand...This is ok or not??

[@rizzotheratful]

Not ok. The fluid that dampens the movement up and down is leaking out so the ride is affected (not smooth, bumpy etc). Generally these are sold as a cartridge that is replaced