gaqzi's questions

I have a Postfix mail server running on Ubuntu 8.10 and when /var/log/mail.log or any other file reaches exactly 2GB of data syslog stops writing any data to the file.

Is there some kind of limit for a file logged through syslog?

I'm discussing with my colleagues if we should be doing an hourly logrotate on the files in question, and hoping that will stop them from hitting this limit. If we have 2-3 hours worth of log files it should be enough when they're this large to find any large problems.

I've just started using nginx and I'm now trying to make it play nice with the Wordpress plugin WP-SuperCache which adds static files of my blog posts.

To serve the static file I need to make sure that some cookies aren't set, that it's not a POST-request and making sure the cached/static file exist.

I found this guide and it seems like a good fit.

But I've noticed that as soon as I try to set something inside an if my site starta giving 404s on an URL that isn't rewritten.

The location block of the configuration:

location /blog {
    index index.php;

    set $supercache_file '';
    set $supercache_ok 1;

    if ($request_method = POST) {
        set $supercache_ok 0;
    }

    if ($http_cookie ~* "(comment_author_|wordpress|wp-postpass_)") {
        set $supercache_ok '0';
    }

    if ($supercache_ok = '1') {
        set $supercache_file '$document_root/blog/wp-content/cache/supercache/$http_host/$1/index.html.gz';
    }

    if (-f $supercache_file) {
        rewrite ^(.*)$ $supercache_file break;
    }

    try_files $uri $uri/ @wordpress;
}

The above doesn't work, and if I remove all the ifs above and add

if ($http_host = 'mydomain.tld') {
    set $supercache_ok = 1;
}

and then I get the exact same message in the errors.log. Namely:

2010/05/12 19:53:39 [error] 15977#0: *84 "/home/ba/www/domain.tld/blog/2010/05/blogpost/index.php" is not found (2: No such file or directory), client: <ip>, server: domain.tld, request: "GET /blog/2010/05/blogpost/ HTTP/1.1", host: "domain.tld", referrer: "http://domain.tld/blog/"

Remove the if and everything works as it should. I'm stymied, no idea at all where I should start searching. =/

ba@cell: ~> nginx -v
nginx version: nginx/0.7.65

I'm looking at doing some reverse proxy work for a mail server with corresponding web client. Both servers are running on the same machine, this is not a server with a high load. :)

The solution I've discussed with friends is having the mail server/web client on our internal network. Then to put a reverse proxy on the DMZ to service both SMTP and web client HTTP-traffic to the mail server on the internal network.

From what I understand this is the recommended secure solution?

So far I've thought for the SMTP-proxy part of using postfix which will receive mail, do some spamhause and similar anti-spam measures and if it all checks out, send the mail to the mail server on the inside. The mail server on the inside will send all outgoing mail to the proxy which will then send it out on the Internet.

For the web client I'm not sure exactly which software I should be running on the proxy machine, I've been thinking about using Squid -- but that's basically based on the fact that I know squid is a http proxy. The web client data will be sent out over SSL.

Reading around some here on Serverfault I've seen other people using Apache with mod_proxy+mod_security for similar situations.

Am I thinking correctly for this solution?
What software would you guys use and with which modules?

Thanks in advance for the help! :)