Connection attempts using mod_proxy

Somedays i receive this lines in my logwatch
ip -> google.com:443: 1 time(s)
ip -> www.alipay.com:443: 2 time(s)

i checked the yunohost
check
nginx -V

nginx version: nginx/1.6.2
TLS SNI support enabled
configure arguments: --with-cc-opt=’-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2’ --with-ld-opt=-Wl,-z,relro --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_addition_module --with-http_dav_module --with-http_flv_module --with-http_geoip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_mp4_module --with-http_perl_module --with-http_random_index_module --with-http_secure_link_module --with-http_spdy_module --with-http_sub_module --with-http_xslt_module --with-mail --with-mail_ssl_module --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/headers-more-nginx-module --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-auth-pam --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-cache-purge --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-dav-ext-module --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-development-kit --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-echo --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/ngx-fancyindex --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-http-push --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-lua --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-upload-progress --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/nginx-upstream-fair --add-module=/home/build/nginx/nginx-1.6.2/debian/modules/ngx_http_substitutions_filter_module

the nginx dont have mod_proxy ,only Apache,and i have the http proxy module empty from nginx,no files there.
if i search the web “Connection attempts using mod_proxy nginx” only have information about apache…
i sneak all the conf files and no configurations for proxy.

if i telnet mydomain 80
and write GET http://www.google.com HTTP/1.1
i receive HTTP/1.1 400 Bad Request
so im thinking i am safe…

i check all the logs and i never find this ips registed in the logs…

so how can protect from this “Connection attempts using mod_proxy”, or this is a false positive?

thks,