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Comment by jhhh | Hacker News Reader

Ublock origin says it supports ABP filter rules which allow for whitelisting sites which seems like it should allow something approximating:

  ~site.com$websocket
  *,~site.com$websocket

However this seems like it's invalid syntax because switching your example to this opens all websocket use back up tested via https://websocketstest.com/

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That is not valid ABP filter syntax. This is what you want:

    *$websocket,domain=~site1.com

For more than a single site:

    *$websocket,domain=~site1.com|site2.com|...

I would personally suggest people to just enable advanced user mode and create rules such as:

    * 127.0.0.1 * blocked

To block all request attempts to 127.0.0.1.

Correction:

    *$websocket,domain=~site1.com|~site2.com|~...

Thanks for the information and all that you do. I had found the linked section from UBO to https://help.eyeo.com/en/adblockplus/how-to-write-filters#el... and assumed that *$websocket was <all_domains><separator><rule> similar to how other filters seem to work but I haven't delved too deeply in the rule syntax. Appreciate the correction.

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