Re: TLS Client Hello not responded by mod_ssl

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> Dear Apache enthusiasts ...
>
> My application is a very simple https-only apache (2.4.43) server with
> mod_ssl (openssl 1.1.1g) in Linux (crux distribution 3.5).

[...]

>     ./configure --enable-layout=CRUX \
>                 --with-apr=/usr \
>                 --with-apr-util=/usr \
>                 --with-pcre=/usr \
>                 --enable-so \
>                 --enable-modules=all \
>                 --enable-mods-shared=all \
>                 --enable-mpms-shared=all

[...]

> ================== (d)
>      ./config --prefix=/usr \
>               --libdir=lib \
>               --openssldir=/etc/ssl \
>               shared \
>               enable-ec_nistp_64_gcc_128
> ================== -the end-

It appears that you're trying to use a custom openssl installation
to build your httpd, but at a casual glance, I haven't seen anything
that would actually make your httpd use that openssl installation.

Make sure that only the correct openssl headers are included during the
build, and that the LD_LIBRARY_PATH, LD_RUN_PATH or preferrably
DT_RUNPATH or DT_RPATH are set so that the matching libraries are
loaded and used (typically using -Wl,-R,/<path>). Also, make sure that
no other modules or libraries  are - possibly indirectly - linked against other
versions of openssl and load those during runtime. Use ldd against all
binaries involved to make sure.

If you want to dig deeper, I'd recommend re-compiling with debug infos (-g),
running with mpm_prefork for simplicity, attaching one httpd process that's
stuck in the ssl handshake and getting a full backtrace (bt full).

rainer

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