gatling(8)gatling(8)NAMEgatling - high performance file server
SYNOPSISgatling [-hnvVtdDfFUlaEe] [-i bind-to-ip] [-p bind-to-port] [-T sec‐
onds]
[-u uid] [-c dir] [-w workgroup] [-P bytes] [-O
[f/]ip/port/regex]
[-r redir-url] [-X timeout,sshd]
DESCRIPTIONgatling is a HTTP and FTP server. It will export the current working
directory to the world.
Use -i 127.0.0.1 to only bind to a certain IP address.
Use -p 81 to bind HTTP to a different TCP port than 80. Use -f -p 2100
to bind FTP to a different TCP port than 21. When running as non-root,
the default ports are 8000 and 2121, respectively.
Use -u nobody to run under a different UID than root. This is done
after binding the server ports, so it is safe to use -u and still bind
to port 80 -- in fact, it is recommended not to run gatling as supe‐
ruser.
Use -c /home/www to chdir and chroot to another directory than the cur‐
rent working directory. It is recommended to run gatling in a chroot
environment to lessen the impact of possible future security problems.
Use -P 2M to activate prefetching mode. Gatling will then make sure
this much data is prefetched. This can reduce disk activity and
improve throughput dramatically if your OS I/O scheduler is not state
of the art and you are serving several large files from the same hard
disk to different downloaders. Without prefetching, the disk will oth‐
erwise waste time moving the disk head between the two large files.
Use -f to enable anonymous FTP (default) or -F to disable it. Use -U
to disable uploads altogether (normally gatling will allow file
uploads). Gatling only allows uploads to world writable directories to
prevent accidental upload permission, and the files will not be world
readable (use -a if you want them world readable). Gatling will only
allow downloads of world readable files, that's why this switch is
important. These options are only available if gatling is compiled
with SUPPORT_FTP defined.
Use -e to enable encryption support (https) or -E to disable it. These
options are only available if gatling is compiled with SUPPORT_HTTPS
defined.
Use -l to make gatling always ask for FTP passwords. Normally gatling
does not, which confuses some stupid clients. This option makes
gatling ask for (and ignore) a password.
Use -d to enable directory index generation for HTTP (listing directo‐
ries is always possible in FTP), -D to disable. It is harder to acci‐
dentally publish a document if the attacker can not find out the file
name through directory listings.
Use -t to enable transparent proxy mode. Normally, gatling will
replace the port in Host: HTTP headers and FTP virtual host names with
the actual port the connection arrived at. This is important for secu‐
rity (in case you have a secret intranet web site on port 81, which is
blocked at the firewall). However, when using a firewall to redirect
connections to gatling, it may make more sense to keep the ports from
the HTTP Host: headers for virtual hosting.
Use -v to enable virtual hosting mode, -V to disable it. Normally,
when a HTTP connection asks for /foo.html and carries a "Host:
www.fefe.de:80" header, gatling will chdir to "www.fefe.de:80". If
"www.fefe.de:80" does not exist, gatling will chdir to "default". If
this also does not exist, and neither -v or -V are given, gatling will
serve "foo.html" from the current working directory. Specifying -v
will make sure that no file is ever served from the current working
directory, only from the virtual host directories or from default.
Specifying -V means that gatling will not try to chdir at all and
always serve from the current working directory.
Use -T 600 to set the timeout for HTTP and FTP data connections to 10
minutes (600 seconds, default is 23 seconds). Use -f -T 600 to set the
timeout for FTP control connections (default is 600 seconds).
If you use -r http://master.example.com/ on mirror.example.com, and
someone asks for a file that does not exist, gatling will not create a
404 error but a redirect to the same file on master.example.com.
Use -X timeout,sshd to enable SSH passthrough mode. If someone con‐
nects on the SSL socket, but does not say anything for timeout (sane
value: 2-10) seconds, then gatling will run an sshd in inetd mode with
that socket. sshd is the full path name to sshd, plus the command line
you want to give it, if any. gatling automatically appends -i, so use
this for example for -u0 to disable DNS lookups.
Use -O [flag/]ip/port/regex to enable proxy mode, also used for SCGI
and FastCGI. To use the proxy mode, there has to be a ".proxy" file in
the root of the virtual host it is meant for. Specify ip and port to
point to your app server, and give a regex to match the URI. Note: the
regex needs to match the full file name, so use the extension for
matching. If no flags are given, HTTP proxying is used. Otherwise,
flags specifies the proxying mode: Use S for SCGI and F for FastCGI
mode. See README.php for an example.
It is also possible to specify a Unix Domain socket, using the syntax
--O [flag/]|filename|regex. Remember to put the argument in quotes
when typing it in the shell.
SIGNALS
Sending gatling SIGHUP will make it close all the server sockets (so
you can start a new gatling process with different options on the same
ports). The old gatling process will continue serving the established
connections until they are all finished.
AUTHOR
Initially written by Felix von Leitner <felix-gatling@fefe.de>.
LICENSE
GPLv2 (see http://www.gnu.org/copyleft/gpl.html) with an exception to
allow linking against openssl.
gatling(8)
