TTL <=0 ?

[Johan Hendriks]

Hello all, varnish tells me that the TTL is smaller or equal to 0, but 
looking at the response headers that is not the case as the BerespHeader 
has  Expires: Wed, 27 Sep 2023 12:23:11 GMT which is in 2023!

This is the part of the log.

-   Begin          bereq 8203147 pass
-   VCL_use        boot
-   Timestamp      Start: 1664281391.802802 0.000000 0.000000
-   BereqMethod    GET
-   BereqURL /wp-content/plugins/canvas/assets/fonts/canvas-icons.woff
-   BereqProtocol  HTTP/1.1
-   BereqHeader    Host: www.site.nl
-   BereqHeader    X-Forwarded-Proto: https
-   BereqHeader    Origin: https://www.site.nl
-   BereqHeader    Accept: */*
-   BereqHeader    User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_6_1 
like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/19G82 
[FBAN/FBIOS;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/15.6.1;FBSS/2;FBID/phone;FBLC/nl_NL;FBOP/5]
-   BereqHeader    Accept-Language: nl-NL,nl;q=0.9
-   BereqHeader    Referer: https://www.site.nl/url
-   BereqHeader    Accept-Encoding: gzip, deflate, br
-   BereqHeader    X-forwarded-for: 123.123.123.1
-   BereqHeader    Cookie: _sharedid=redacted; cto_bundle=redacted
-   BereqHeader    X-Varnish-Nocache-Recv: Got request cookie 
(_sharedid=redacted; cto_bundle=redacted
-   BereqHeader    X-Varnish: 8203148
-   VCL_call       BACKEND_FETCH
-   VCL_return     fetch
-   BackendOpen    47 default 127.0.0.1 8080 127.0.0.1 48076
-   BackendStart   127.0.0.1 8080
-   Timestamp      Bereq: 1664281391.802852 0.000050 0.000050
-   Timestamp      Beresp: 1664281391.802989 0.000186 0.000137
-   BerespProtocol HTTP/1.1
-   BerespStatus   200
-   BerespReason   OK
-   BerespHeader   Server: nginx
-   BerespHeader   Date: Tue, 27 Sep 2022 12:23:11 GMT
-   BerespHeader   Content-Type: application/font-woff
-   BerespHeader   Content-Length: 4316
-   BerespHeader   Last-Modified: Tue, 06 Sep 2022 23:45:48 GMT
-   BerespHeader   Connection: keep-alive
-   BerespHeader   ETag: "6317dbac-10dc"
-   BerespHeader   Expires: Wed, 27 Sep 2023 12:23:11 GMT
-   BerespHeader   Cache-Control: max-age=31536000
-   BerespHeader   Accept-Ranges: bytes
-   VCL_call       BACKEND_RESPONSE
-   BerespHeader   X-Req-Host: www.site.nl
-   BerespHeader   X-Req-URL: 
/wp-content/plugins/canvas/assets/fonts/canvas-icons.woff
-   BerespHeader   X-Req-URL-Base: 
/wp-content/plugins/canvas/assets/fonts/canvas-icons.woff
-   BerespHeader   X-Varnish-Nocache-Beresp: TTL <= 0s
-   TTL            VCL 120 0 0 1664281392 uncacheable
-   TTL            VCL 120 0 0 1664281392 uncacheable
-   BerespHeader   X-Varnish-TTL: 120.000
-   BerespHeader   X-Varnish-Backend: default
-   VCL_return     deliver

The config from the vcl backend_responce is as follows, this sets the 
X-Varnish-Nocache-Beresp header.

sub vcl_backend_response {
     if (beresp.ttl <= 0s || beresp.http.Set-Cookie || 
beresp.http.Surrogate-control ~ "no-store" ||
       (!beresp.http.Surrogate-Control && beresp.http.Cache-Control ~ 
"no-cache|no-store|private") ||
       beresp.http.Vary == "*") {

         # DEBUG INFORMATION - DOES NOT INFLUENCE CACHING #
         if (beresp.ttl <= 0s) {
             if (beresp.http.X-Varnish-Nocache-Beresp) {
                 set beresp.http.X-Varnish-Nocache-Beresp = 
beresp.http.X-Varnish-Nocache-Beresp + ", TTL <= 0s";
             }
             else {
                 set beresp.http.X-Varnish-Nocache-Beresp = "TTL <= 0s";
             }
         }

         if(beresp.http.Set-Cookie) {
             if (beresp.http.X-Varnish-Nocache-Beresp) {
                 set beresp.http.X-Varnish-Nocache-Beresp = 
beresp.http.X-Varnish-Nocache-Beresp + ", got response cookie (" + 
beresp.http.Set-Cookie + ")" ;
             }
             else {
                 set beresp.http.X-Varnish-Nocache-Beresp = "Response 
cookie (" + beresp.http.Set-Cookie + ")";
             }
         }

         if (beresp.http.Surrogate-control ~ "no-store" || 
(!beresp.http.Surrogate-Control && beresp.http.Cache-Control ~ 
"no-cache|no-store|private")) {
             if (beresp.http.X-Varnish-Nocache-Beresp) {
                 set beresp.http.X-Varnish-Nocache-Beresp = 
beresp.http.X-Varnish-Nocache-Beresp + ", got no-cache|no-store|private";
             }
             else {
                 set beresp.http.X-Varnish-Nocache-Beresp = "Got 
no-cache|no-store|private";
             }
         }
         # DEBUG INFORMATION - DOES NOT INFLUENCE CACHING #

         /*
         * Mark as "Hit-For-Pass" for the next 2 minutes
         */
         set beresp.ttl = 120s;
         set beresp.uncacheable = true;
     }

Am i right that the TTL is <=0 because it sends a cookie to the backend?
Thank you for your time!