[squid-users] TCP_MISS_ABORTED/502

[Ben Toms]

Hi folks,

We’re looking to leverage squid-cache as an accelerator, but for large content. For example, a local cache of macOS installers so that the internet line isn’t swamped when updating Photoshop etc across devices.

Below is an example of the conf I’ve been using (and have been going backwards and forwards trying different things):

https_port 443 accel protocol=HTTPS tls-cert=/usr/local/squid/client.pem tls-key=/usr/local/squid/client.key
cache_peer public.server.fqdn parent 443 0 no-query originserver no-digest no-netdb-exchange tls login=PASSTHRU name=myAccel
acl our_sites dstdomain local.server.fqdn
http_access allow our_sites
cache_peer_access myAccel allow our_sites
cache_peer_access myAccel deny all
refresh_pattern -i public.server.fqdn/.* 3600    80%     14400
cache_dir ufs /usr/local/squid/var/cache 100000 16 256

When I attempt to curl a file from local.server.fqdn, I can see that there has been a request made to public.server.fqdn and that the authentication has been passed through and all is well (it returns a 200 code and needs authentication), but I’m seeing TCP_MISS_ABORTED/502 in /var/log/squid/access.log as per the below:

1720711470.297     84 192.168.0.156 TCP_MISS_ABORTED/502 3974 GET https://local.server.fqdn/some/file/path - FIRSTUP_PARENT/public.ip.of.public.server text/html

Seems like the client to squid-cache HTTPS conection is fine, and squid-cache can contact public.server.fqdn.. but nothing is cached.

Help appreciated.

Regards,
Ben.
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