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Add paragraph and example for using wildcart for --allow-net #2537

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Add paragraph and example for using wildcart for --allow-net #2537

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c0069e6
feat: add docs and example with hostname wildcard usage
csvn Sep 11, 2025
64e0900
fix: improve the text a bit
csvn Sep 11, 2025
9905a24
Merge branch 'main' into patch-1
thisisjofrank Sep 16, 2025
042cf71
Fix typo in security.md regarding hostnames
thisisjofrank Sep 16, 2025
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6 changes: 6 additions & 0 deletions runtime/fundamentals/security.md
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Original file line number Diff line number Diff line change
Expand Up @@ -219,6 +219,9 @@ Network access is granted using the `--allow-net` flag. This flag can be
specified with a list of IP addresses or hostnames to allow access to specific
network addresses.

Hostnames do not allow subdomains, unless explicitly listed. To allow any
subdomain for a hostname, `*` can be used as wildcard for any subdomain.

Definition: `--allow-net[=<IP_OR_HOSTNAME>...]` or `-N[=<IP_OR_HOSTNAME>...]`

```sh
Expand All @@ -230,6 +233,9 @@ deno run --allow-net script.ts
# Allow network access to github.com and jsr.io
deno run --allow-net=github.com,jsr.io script.ts

# Allow all subdomains for example.com
deno run --allow-net="*.example.com" script.ts

# A hostname at port 80:
deno run --allow-net=example.com:80 script.ts

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