From 59983d4722c1efd08ea79dcd1932fe72b78ecba7 Mon Sep 17 00:00:00 2001 From: dgaudet Date: Sat, 21 Jun 1997 18:56:36 +0000 Subject: [PATCH] merge in Dirk's three new faq additions git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@78331 13f79535-47bb-0310-9956-ffa450edef68 --- docs/manual/misc/FAQ.html | 124 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 119 insertions(+), 5 deletions(-) diff --git a/docs/manual/misc/FAQ.html b/docs/manual/misc/FAQ.html index a34c33e778..4183ee6f4b 100644 --- a/docs/manual/misc/FAQ.html +++ b/docs/manual/misc/FAQ.html @@ -15,7 +15,7 @@

Apache Server Frequently Asked Questions

- $Revision: 1.72 $ ($Date: 1997/06/20 17:17:23 $) + $Revision: 1.73 $ ($Date: 1997/06/21 18:56:36 $)

The latest version of this FAQ is always available from the main @@ -131,6 +131,8 @@

  • Why can't I run more than <n> virtual hosts?
    • +
  • Can I increase FD_SETSIZE on FreeBSD? +
  • Why do I keep getting "access denied" for form POST requests?
    • @@ -208,6 +210,13 @@
  • When I run it under Linux I get "shmget: function not found", what should I do?
    • +
  • Why does my authentification give + me a server error? +
  • Do I have to keep the (mSQL) + authentification information on the same machine? +
    • +
  • Why is my mSQL authentification terribly slow? +
    • @@ -819,8 +828,9 @@ HREF="../mod/core.html#listen" >Listen directives. If there are no other servers running on the machine - and all of them are running on the same port, you normally don't - need any Listen directives at all. + on the same port then you normally don't + need any Listen directives at all. By default Apache listens to + all addresses on port 80.
  • Reduce the number of log files. You can use performance hints - page. + page. There is a specific note for + FreeBSD below.
  • "Don't do that" - try to run with fewer virtual hosts
    • @@ -854,6 +865,24 @@ available in the way of solutions.

    + +
  • + Can I increase FD_SETSIZE on FreeBSD? + +

    + On FreeBSD 2.2 and older FD_SETSIZE, which limits the number of open + files on the system, is limted to 256. This can limit the number of + virtual hosts you are using; especially if they all use different log + files. Increasing this limit (and recompiling apache) is not enough + (As it is on some platforms, such as Solaris), as you also will have + to recompile libc with the changed setting. +

    +

    + On FreeBSD 3.0 the default is 1024, so the problem is lessened. +

    +
    +
    • +
  • Why do I keep getting "access denied" for form POST requests? @@ -1160,7 +1189,8 @@
  • Why do I get complaints about redefinition - of "struct iovec" when compiling under Linux? + of "struct iovec" when + compiling under Linux?

    This is a conflict between your C library includes and your kernel @@ -1584,6 +1614,90 @@

    • +
  • + Why does my authentification give me a server error? + +

    + Under normal circumstances, the apache access control modules will + pass unrecognized userids on to the next access control module in + line. Only if the userid is recognized, the password is validated + (or not) will it give the usual success or authentification failed + messages. +

    +

    + However if the last access module in line 'declines' the validation + request (because it has never heard of the userid or because it is not + configured) the http_request handler will give one of the following, + confusing, errors: +

    + This does not mean that you have to add a 'AuthUserFile /dev/null' + line as some magazines suggest ! +

    +

    + The solution is to ensure that at least the last module is authoritative + and CONFIGURED. By default mod_auth is authoritative + and will give an OK/Denied, but only if it is configured with the + proper AuthUserFile. Likewise if a valid group is required. (Remember + that the modules are processed in the reverse order they appear in + your compile-time Configuration file.) +

    +

    + A typical situation for this error is when you are using the + mod_auth_dbm, mod_auth_msql, mod_auth_mysql, mod_auth_anon or + mod_auth_cookie on their own. These are by default not + authoritative, and this will pass the buck on to the (non-existent) next + authentification module when the user ID is not in their respective + database. Just add the appropriate 'XXXAuthoritative yes' line to + the configuration. +

    +

    + In general it is a good idea (though not terribly efficient) to have the + file based mod_auth a module of last resort. This allows you to access + the web server with a few special passwords even if the databases are + down or corrupted. This does cost a file-open/seek/close for each + request in a protected area. +

    +
    +
    • + +
  • + Do I have to keep the (mSQL) authentification information + on the same machine? + +

    + Some organizations feel very strongly about keeping the authentification + information on a different machine than the webserver. With the + mod_auth_msql, mod_auth_mysql and other SQL modules connecting to + (R)DBMses this is quite well possible. Just configure an explicit host + to contact. +

    +

    + Be aware that with mSQL and Oracle, opening and closing these database + connections is very expensive and time consuming. You might want to + look at the code in the auth_modules and play with the compile time + flags to alleviate this somewhat; if your RDBMS licences alows for it. +

    +
    +
    • + +
  • + Why is my mSQL authentification terribly slow? + +

    + You have probably configured the Host by specificing a FQHN, + and thus the libmsql will use a full blown tcp/ip socket to talk to + the database, rather than a fast internal device. Both the libmsql, + the mSQL faq and the mod_auth_msql documentation warn you about this. If + you have to use different hosts, check out the mod_auth_msql code for + some compile time flags which might, or might not suit you. +

    +
    +
    • + -- 2.40.0