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sslproxy.conf(5) SSLproxy sslproxy.conf(5) NAME sslproxy.conf - Configuration file for SSLproxy DESCRIPTION The file sslproxy.conf configures SSLproxy, sslproxy(1). FILE FORMAT The file consists of comments and options with arguments. Each line which starts with a hash (#) symbol is ignored by the parser. Options and argu- ments are of the form Option Argument. Structured proxyspecs are defined between curly braces. The opening curly brace should be on the same line as the ProxySpec keyword. The closing curly brace and option-argument pairs should be on a line of their own. The arguments are of the following types: BOOL Boolean value (yes/no). STRING String. NUMBER Unsigned integer. DIRECTIVES When an option is not used (hashed or doesn't exist in the configuration file) sslproxy takes a default action. If an option is defined outside any structured proxyspec, then it is used as a global default. If an option does not have a command line equivalent, -o opt=val option can be used to override it on the command line. Note that the ordering of options, rules, and proxyspecs in configuration files (and on the command line) is important. For example, rules and prox- yspecs can only make use of the options defined earlier. CACert STRING Use CA cert (and key) to sign forged certs. Equivalent to -c command line option. CAKey STRING Use CA key (and cert) to sign forged certs. Equivalent to -k command line option. ClientCert STRING Use cert from pemfile when destination requests client certs. Equiv- alent to -a command line option. ClientKey STRING Use key from pemfile when destination requests client certs. Equiva- lent to -b command line option. CAChain STRING Use CA chain from pemfile (intermediate and root CA certs). Equiva- lent to -C command line option. LeafKey STRING Use key from pemfile for leaf certs. Equivalent to -K command line option. Default: generate LeafCRLURL STRING Use URL as CRL distribution point for all forged certs. Equivalent to -q command line option. LeafCertDir STRING Use cert+chain+key PEM files from certdir to target all sites match- ing the common names (non-matching: generate if CA). Equivalent to -t command line option. DefaultLeafCert STRING Use cert+chain+key from PEM file for leaf certificates if there is no match in LeafCertDir. Equivalent to -A command line option. WriteGenCertsDir STRING Write leaf key and only generated certificates to gendir. Equivalent to -w command line option. WriteAllCertsDir STRING Write leaf key and all certificates to gendir. Equivalent to -W com- mand line option. DenyOCSP BOOL Deny all OCSP requests on all proxyspecs. Equivalent to -O command line option. Passthrough BOOL Passthrough SSL connections if they cannot be split because of client cert auth or no matching cert and no CA. Equivalent to -P command line option. Default: drop DHGroupParams STRING Use DH group params from pemfile. Equivalent to -g command line op- tion. Default: keyfiles or auto ECDHCurve STRING Use ECDH named curve. Equivalent to -G command line option. Default: prime256v1 SSLCompression BOOL Enable/disable SSL/TLS compression on all connections. Equivalent to -Z command line option. ForceSSLProto STRING Force SSL/TLS protocol version only. Equivalent to -r command line option. Default: all DisableSSLProto STRING Disable SSL/TLS protocol version. Equivalent to -R command line op- tion. Default: none EnableSSLProto STRING Enable SSL/TLS protocol version. Equivalent to -B command line op- tion. Default: all MinSSLProto STRING Min SSL/TLS protocol version. Default: tls10 MaxSSLProto STRING Max SSL/TLS protocol version. Default: tls13 Ciphers STRING Use the given OpenSSL ciphers spec. Equivalent to -s command line option. Default: ALL:-aNULL CipherSuites STRING Use the given OpenSSL ciphersuites spec. The ciphersuites spec is for TLS 1.3. Equivalent to -U command line option. Default: TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256 LeafKeyRSABits NUMBER Leaf key RSA keysize in bits, use 1024|2048|3072|4096. Default: 2048 OpenSSLEngine STRING The OpenSSL engine to activate. Equivalent to -x command line op- tion. NATEngine STRING Specify default NAT engine to use. Equivalent to -e command line op- tion. User STRING Drop privileges to user. Equivalent to -u command line option. Default: nobody, if run as root Group STRING Drop privileges to group. Equivalent to -m command line option. Default: Primary group of user Chroot STRING chroot() to jaildir (impacts sni proxyspecs, see sslproxy(1)). Equivalent to -j command line option. PidFile STRING Write pid to file. Equivalent to -p command line option. ConnectLog STRING Connect log: log one line summary per connection to logfile. Equiva- lent to -l command line option. ContentLog STRING Content log: full data to file or named pipe (excludes Content- LogDir/ContentLogPathSpec). Equivalent to -L command line option. ContentLogDir STRING Content log: full data to separate files in dir (excludes Content- Log/ContentLogPathSpec). Equivalent to -S command line option. ContentLogPathSpec STRING Content log: full data to sep files with % subst (excludes Content- Log/ContentLogDir). Equivalent to -F command line option. LogProcInfo BOOL Look up local process owning each connection for logging. Equivalent to -i command line option. PcapLog STRING Pcap log: packets to pcapfile (excludes PcapLogDir/PcapLogPathSpec). Equivalent to -X command line option. PcapLogDir STRING Pcap log: packets to separate files in dir (excludes PcapLog/PcapLogPathSpec). Equivalent to -Y command line option. PcapLogPathSpec STRING Pcap log: packets to sep files with % subst (excludes PcapLog/PcapLogDir). Equivalent to -y command line option. MirrorIf STRING Mirror packets to interface. Equivalent to -I command line option. MirrorTarget STRING Mirror packets to target address (used with MirrorIf). Not used if the target is irrelevant (e.g. mirror to dummy device). Equivalent to -T command line option. MasterKeyLog STRING Log master keys to logfile in SSLKEYLOGFILE format. Equivalent to -M command line option. Daemon BOOL Daemon mode: run in background, log error messages to syslog. Equiv- alent to -d command line option. Debug BOOL Debug mode: run in foreground, log debug messages on stderr. Equiva- lent to -D command line option. DebugLevel NUMBER Verbose debug level, 2-4. ConnIdleTimeout NUMBER Close connections after this many seconds of idle time. Default: 120 ExpiredConnCheckPeriod NUMBER Check for expired connections every this many seconds. Default: 10. LogStats BOOL Log statistics to syslog. Equivalent to -J command line option. Default: yes StatsPeriod NUMBER Log statistics every this many ExpiredConnCheckPeriod periods. Default: 1 RemoveHTTPAcceptEncoding BOOL Remove HTTP header line for Accept-Encoding. Default: yes RemoveHTTPReferer BOOL Remove HTTP header line for Referer. Default: yes VerifyPeer BOOL Verify peer using default certificates. Default: yes AllowWrongHost BOOL When disabled, never add the SNI to forged certificates, even if the SNI provided by the client does not match the server certificate's CN/SAN. Helps pass the wrong.host test at https://badssl.com. Default: no UserAuth BOOL Require authentication for users to use SSLproxy. Default: no DivertUsers STRING Comma separated list of users. Connections from these users are di- verted to listening programs. Users not listed in DivertUsers or PassUsers are blocked. Max of 50 users can be listed. PassUsers STRING Comma separated list of users. Connections from these users are sim- ply passed through to their original destinations, not diverted to listening programs. Users not listed in DivertUsers or PassUsers are blocked. Max of 50 users can be listed. UserDBPath STRING Path to user db file. UserTimeout NUMBER Time users out after this many seconds of idle time. Default: 300. UserAuthURL STRING Redirect URL for users to log in to the system. ValidateProto BOOL Validate proxy spec protocols. Default: no MaxHTTPHeaderSize NUMBER Max HTTP header size in bytes for protocol validation. Default: 8192. OpenFilesLimit NUMBER Set open files limit, use 50-10000. Default: System-wide limit. Divert BOOL Set divert or split mode of operation, globally or per-proxyspec. The Divert option is not equivalent to the command line -n option. Default: yes PassSite STRING Passthrough site: site[*] [(clientaddr|user|*) [description desc]]. PassSite option is a special form of Pass filtering rule. All Pass- Site rules can be written as Pass filter rules. The PassSite option will be deprecated in favor of filter rules in the future. If the site matches SNI or common names in the SSL certificate, the connec- tion is passed through the proxy. Per site filters can be defined using client IP addresses, users, and description. '*' matches all client IP addresses or users. User auth should be enabled for user and description filtering to work. Case is ignored while matching description. Multiple sites are allowed, one on each line. PassSite rules can search for exact or substring matches. Append an asterisk to the site field to search for substring match. Note that the sub- string search is not a regex or wildcard search, and that the aster- isk at the end is removed before search. Include STRING Load configuration from an include file. Recursive include files are not allowed. The Include option cannot be used in include files. Define STRING Define macro to be used in filtering rules. Macro names must start with a $ char. The macro name must be followed by words separated with spaces. For example, Define $macro value1 value2 Recursive macro definitions are not allowed. Divert STRING Divert filtering rule diverts packets to listening program, allowing SSL inspection by listening program and content logging of packets. Split STRING Split filtering rule splits the connection but does not divert pack- ets to listening program, effectively disabling SSL inspection by listening program, but allowing content logging of packets. Pass STRING Pass filtering rule passes the connection through by engaging passthrough mode, effectively disabling SSL inspection and content logging of packets. Block STRING Block filtering rule terminates the connection. Match STRING Match filtering rule specifies log actions for the connection with- out changing its filter action. The syntax of one line filtering rules is as follows: (Divert|Split|Pass|Block|Match) ([from ( user (username[*]|$macro|*) [desc (desc[*]|$macro|*)]| desc (desc[*]|$macro|*)| ip (clientip[*]|$macro|*)| *)] [to ( (sni (servername[*]|$macro|*)| cn (commonname[*]|$macro|*)| host (host[*]|$macro|*)| uri (uri[*]|$macro|*)| ip (serverip[*]|$macro|*)) [port (serverport[*]|$macro|*)]| port (serverport[*]|$macro|*)| *)] [log ([[!]connect] [[!]master] [[!]cert] [[!]content] [[!]pcap] [[!]mirror] [$macro]|[!]*)] |*) [# comment] See sslproxy(1) for the details. FilterRule { Action User Desc SrcIp SNI CN Host URI DstIp DstPort Log ReconnectSSL Passthrough DenyOCSP CACert CAKey ClientCert ClientKey CAChain LeafCRLURL DHGroupParams ECDHCurve SSLCompression ForceSSLProto DisableSSLProto EnableSSLProto MinSSLProto MaxSSLProto Ciphers CipherSuites VerifyPeer AllowWrongHost RemoveHTTPAcceptEncoding RemoveHTTPReferer MaxHTTPHeaderSize ValidateProto UserAuth UserTimeout UserAuthURL } Structured filtering rules can specify connection options to be se- lectively applied to matching connections, not just per-proxyspec or globally. One line filtering rules cannot specify connection op- tions. See sslproxy(1) for the details. ProxySpec STRING One line proxy specification: type listenaddr+port up:port ua:addr ra:addr. The other options of one line proxyspecs are set to the global configuration preceding them. Multiple specs are allowed, one on each line. ProxySpec { Proto Addr Port DivertPort DivertAddr ReturnAddr TargetAddr TargetPort SNIPort NatEngine Divert Passthrough DenyOCSP CACert CAKey ClientCert ClientKey CAChain LeafCRLURL DHGroupParams ECDHCurve SSLCompression ForceSSLProto DisableSSLProto EnableSSLProto MinSSLProto MaxSSLProto Ciphers CipherSuites VerifyPeer AllowWrongHost RemoveHTTPAcceptEncoding RemoveHTTPReferer MaxHTTPHeaderSize ValidateProto UserAuth UserTimeout UserAuthURL DivertUsers PassUsers PassSite Define (Divert|Split|Pass|Block|Match) one line filtering rules FilterRule {...} structured filtering rules } Structured proxy specifications may consist of the options listed above. The Addr and Port options are mandatory, and equivalent to the listenaddr and port options in one line proxyspecs, respec- tively. If an option is not specified, the global default value is used. FILES /etc/sslproxy/sslproxy.conf AUTHOR The config file facility was added by Soner Tari <sonertari@gmail.com>. SEE ALSO sslproxy(1) v0.9.9 09 Nov 2025 sslproxy.conf(5)
NAME | DESCRIPTION | FILE FORMAT | DIRECTIVES | FILES | AUTHOR | SEE ALSO
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