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I can see a strange domain request in my error log:

2011/11/03 09:04:18 [error] 1203#0: *4044 FastCGI sent in stderr: "Successfully fetched '': GET response code 200" while reading response header from upstream, client:, server:, request: "POST /wp-comments-post.php HTTP/1.1", upstream:

Does this indicate my site has been hacked?

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up vote 0 down vote accepted

Does this indicate my site has been hacked?

No, it means that a spam bot is trying to bypass the comments form. You can stop it by adding the belows config to server context in nginx.conf:

    set $poster "";
    if ($request_method = POST) {
        set $poster "${poster}P";
    if ($request_uri = /wp-comments-post.php) {
        set $poster "${poster}W";
    if ($http_referer !~ ^(jeannie733.2itb\.com) ) {
        set $poster "${poster}R";
    if ($http_user_agent = "") {
        set $poster "${poster}U";
    if ($poster = PWRU) {
        return 444;

The 444 status code makes Nginx returns no information to the client and closes the connection.

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