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Special Forums IP Networking Proxy Server Httpd proxy on AIX: failed to connect SSL Post 303042275 by Neo on Friday 20th of December 2019 04:10:01 AM
Old 12-20-2019
Code:
Description:	Controls the verbosity of the ErrorLog
Syntax:	LogLevel [module:]level [module:level] ...
Default:	LogLevel warn
Context:	server config, virtual host, directory
Status:	Core
Module:	core
Compatibility:	Per-module and per-directory configuration is available in Apache HTTP Server 2.3.6 and later
LogLevel adjusts the verbosity of the messages recorded in the error logs (see ErrorLog directive). 

The following levels are available, in order of decreasing significance:

Level	Description	Example
emerg	Emergencies - system is unusable.	"Child cannot open lock file. Exiting"
alert	Action must be taken immediately.	"getpwuid: couldn't determine user name from uid"
crit	Critical Conditions.	"socket: Failed to get a socket, exiting child"
error	Error conditions.	"Premature end of script headers"
warn	Warning conditions.	"child process 1234 did not exit, sending another SIGHUP"
notice	Normal but significant condition.	"httpd: caught SIGBUS, attempting to dump core in ..."
info	Informational.	"Server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers)..."
debug	Debug-level messages	"Opening config file ..."
trace1	Trace messages	"proxy: FTP: control connection complete"
trace2	Trace messages	"proxy: CONNECT: sending the CONNECT request to the remote proxy"
trace3	Trace messages	"openssl: Handshake: start"
trace4	Trace messages	"read from buffered SSL brigade, mode 0, 17 bytes"
trace5	Trace messages	"map lookup FAILED: map=rewritemap key=keyname"
trace6	Trace messages	"cache lookup FAILED, forcing new map lookup"
trace7	Trace messages, dumping large amounts of data	"| 0000: 02 23 44 30 13 40 ac 34 df 3d bf 9a 19 49 39 15 |"
trace8	Trace messages, dumping large amounts of data	"| 0000: 02 23 44 30 13 40 ac 34 df 3d bf 9a 19 49 39 15 |"
When a particular level is specified, messages from all other levels of higher significance will be reported as well. 

E.g., when LogLevel info is specified, then messages with log levels of notice and warn will also be posted.

Using a level of at least crit is recommended.

For example:

LogLevel notice
Note
When logging to a regular file, messages of the level notice cannot be suppressed and thus are always logged. However, this doesn't apply when logging is done using syslog.

Specifying a level without a module name will reset the level for all modules to that level. 

Specifying a level with a module name will set the level for that module only. 

It is possible to use the module source file name, the module identifier, or the module identifier with the trailing _module omitted as module specification. 

This means the following three specifications are equivalent:

LogLevel info ssl:warn
LogLevel info mod_ssl.c:warn
LogLevel info ssl_module:warn
It is also possible to change the level per directory:

LogLevel info
<Directory "/usr/local/apache/htdocs/app">
  LogLevel debug
</Directory>
Per directory loglevel configuration only affects messages that are logged after the request has been parsed and that are associated

Reference:

Controls the verbosity of the ErrorLog - Apache HTTP Server Version 2.4
 
Test Your Knowledge in Computers #19
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SSLH(1p)						User Contributed Perl Documentation						  SSLH(1p)

NAME
sslh - Switch incoming connection between SSH and SSL/HTTPS servers SYNOPSIS
sslh [ -v ] [ -p [host:]port ] [ -t timeout ] [ --ssh [host:]port ] [ --ssl [host:]port ] DESCRIPTION
sslh is a simple script that lets you switch an incoming connection on a single port between distinct SSH and SSL/HTTPS servers. sslh listens for connections on a port and is able to redirect them either to an HTTPS web server or a SSH server. This lets one setup both a HTTPS web server and a SSH server and access them through the same host+port. OPTIONS
The program follows the usual GNU command line syntax, with long options starting with two dashes. -p, --port [host:]port The port the proxy will listen to. If no port is given, 443 is used by default. If no host is given, "localhost" is used by default. -s, --ssh [host:]port The SSH server which the SSH connections must be forwarded to. If omitted, the default is localhost:22. -l, --ssl, --https [host:]port The HTTPS server which the HTTPS connections must be forwarded to. If omitted, the default is localhost:443. -t, --timeout delay Timeout in seconds before a silent incoming connection is considered as a SSH connection. The number can be fractional. The default is 2seconds. -v, --verbose Verbose output. This option can be used several times for more verbose output. EXAMPLE OF USE
Is this tool actually useful? Yes. For example one can use it to access both a SSH server and a secure web server via a corporate proxy that only accepts to relay connections to port 443. Creating a tunnel that passes SSH connection through a CONNECT-enabled web proxy is easy with connect-tunnel (also included in the "Net::Proxy" distribution). The proxy will let both SSH and HTTPS connections out (since they all point to port 443), and the home server will connect those incoming connections to the appropriate server. This only requires to run the HTTPS server on a non standard port (not 443). TECHNICAL NOTE
How can this proxy find out what kind of protocol is using a TCP connection to port 443, without being connected (yet) to the server? We actually rely on a slight difference between the SSL and SSH protocols (found thanks to ethereal): SSH Once the TCP connection is established, the server speaks first, presenting itself by saying something like: SSH-2.0-OpenSSH_3.6.1p2 Debian 1:3.6.1p2-1 SSL With SSL, it's always the client that speaks first. This means that sslh can be used with any pair of protocols/services that share this property (the client speaks first for one and the server speaks first for the other). AUTHORS
Original idea and C version Frederic Ple "<sslh@wattoo.org>". Perl versions Philippe 'BooK' Bruhat "<book@cpan.org>". SCRIPT HISTORY
Version 0.01 of the script was a quick hack designed in 2003 as a proof of concept. Version 0.02 (and higher) are based on "Net::Proxy", and included with the "Net::Proxy" distribution. Version 0.02 didn't work, though. Version 0.03 correctly initialised the "in" connector. Version 0.04 lets the proxy listen on any address (instead of "localhost", which is still the default). Thanks to Dieter Voegtli for spotting this. SEE ALSO
Net::Proxy, Net::Proxy::Connector::dual. COPYRIGHT
Copyright 2003-2006, Philippe Bruhat. All rights reserved. LICENSE
This module is free software; you can redistribute it or modify it under the same terms as Perl itself. perl v5.10.1 2009-10-18 SSLH(1p)

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