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Disable TLSv1.0 and TLSv1.1 #3354

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merged 3 commits into from Mar 22, 2018
Merged

Disable TLSv1.0 and TLSv1.1 #3354

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2622220
Disable TLSv1.0 and TLSv1.1
dstufft Mar 22, 2018
2697917
Merge branch 'master' into disable-tls-tlsv1-tlsv1-1
dstufft Mar 22, 2018
c1febaa
Forgot ;
dstufft Mar 22, 2018
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14 changes: 14 additions & 0 deletions vcl/main.vcl
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Expand Up @@ -8,6 +8,14 @@

sub vcl_recv {

# Fastly is dropping support for TLSv1.0 and TLSv1.1, in preperation for
# for that, we're going to block support for it now, using VCL. This will
# let us present a better error message in the interim before Fastly shuts
# off TLSv1.0 and TLSv1.1 support completely.
if (tls.client.protocol ~ "^TLSv1(\.(0|1))?$") {
error 804 "Bad SSL Version";
}

# I'm not 100% sure on what this is exactly for, it was taken from the
# Fastly documentation, however, what I *believe* it does is just ensure
# that we don't serve a stale copy of the page from the shield node when
Expand Down Expand Up @@ -383,6 +391,12 @@ sub vcl_error {
set obj.http.Content-Type = "text/plain; charset=UTF-8";
synthetic {"SSL is required."};
return (deliver);
} else if(obj.status == 804) {
set obj.status = 403;
set obj.response = "TLSv1.2+ is required";
set obj.http.Content-Type = "text/plain; charset=UTF-8";
synthetic {"Support for " tls.client.protocol " has been removed, please upgrade to a TLSv1.2+ client."};
return (deliver);
} else if (obj.status == 750) {
set obj.status = 301;
set obj.http.Location = req.http.Location;
Expand Down