vcl 4.1; backend nurd_matrix { .host = "127.0.0.1"; .port = "8080"; .connect_timeout = 60s; .first_byte_timeout = 60s; .between_bytes_timeout = 60s; .probe = { .url = "/"; .interval = 5s; .timeout = 1 s; .window = 5; .threshold = 3; .initial = 1; } }