3proxy.cfg man page

3proxy.cfg — 3proxy configuration file


Common structure:
Configuration file is a text file 3proxy reads configuration from. Each line of the file is a command executed immediately, as it was given from console. Sequence of commands is important. Configuration file as actually a script for 3proxy executable. Each line of the file is treated as a blank (space or tab) separated command line. Additional space characters are ignored. Think about 3proxy as "application level router" with console interface.

Any string beginning with space character or ´#´ character is comment. It´s ignored. <LF>s are ignored. <CR> is end of command.

Quotation character is " (double quote). Quotation must be used to quote spaces or another special characters. To use quotation character inside quotation character must be dubbed (BASIC convention). For example to use HELLO "WORLD" as an argument you should use it as "HELLO ""WORLD""". Good practice is to quote any argument you use.

File inclusion:
You can include file by using $FILENAME macro (replace FILENAME with a path to file, for example $/usr/local/etc/3proxy/conf.incl or
$"c:\Program Files\3proxy\include.cfg" Quotation is required in last example because path contains space character. For included file <CR> (end of line characters) is treated as space character (arguments delimiter instead of end of command delimiter). Thus, include files are only useful to store long signle-line commands (like userlist, network lists, etc). To use dollar sign somewhere in argument it must be quoted. Recursion is not allowed.

Next commands start gateway services:

proxy [options]
socks [options]
pop3p [options]
ftppr [options]
admin [options]
dnspr [options]
tcppm [options] <SRCPORT> <DSTADDR> <DSTPORT>
udppm [options] <SRCPORT> <DSTADDR> <DSTPORT>
proxy - HTTP/HTTPS proxy (default port 3128)
socks - SOCKS 4/4.5/5 proxy (default port 1080)
pop3p - POP3 proxy (default port 110)
ftppr - FTP proxy (default port 21)
admin - Web interface (default port 80)
dnspr - caching DNS proxy (default port 53)
tcppm - TCP portmapper
udppm - UDP portmapper

-pNUMBER change default server port to NUMBER
-n disable NTLM authentication (required if passwords are stored in Unix crypt format.
-n1 enable NTLMv1 authentication.
-s (for admin) - secure, allow only secure operations (currently only traffic counters view without ability to reset).
(for dnspr) - simple, do not use 'resolver' and 3proxy cache, always use external DNS server.
(for udppm) - singlepacket, expect only one packet from both client and server
-u Never ask for username/password
-u2 (socks) require username/password in authentication methods
-a (for proxy) - anonymous proxy (no information about client reported)
-a1 (for proxy) - anonymous proxy (random client information reported)
-a2 (for proxy) - generate Via: and X-Forwared-For: instead of Forwarded:
-6 Only resolve IPv6 addresses. IPv4 addresses are packed in IPv6 in IPV6_V6ONLY compatible way.
-4 Only resolve IPv4 addresses
-46 Resolve IPv6 addresses if IPv4 address is not resolvable
-64 Resolve IPv4 addresses if IPv6 address is not resolvable
-RHOST:port listen on given local HOST:port for incoming connections instead of making remote outgoing connection. Can be used with another 3proxy service running -r option for connect back functionality. Most commonly used with tcppm. HOST can be given as IP or hostname, useful in case of dynamic DNS.
-rHOST:port connect to given remote HOST:port instead of listening local connection on -p or default port. Can be used with another 3proxy service running -R option for connect back functionality. Most commonly used with proxy or socks. HOST can be given as IP or hostname, useful in case of dynamic DNS.
Also, all options mentioned for proxy(8) socks(8) pop3p(8) tcppm(8) udppm(8) ftppr(8)
are also supported.
Portmapping services listen at SRCPORT and connect to DSTADDR:DSTPORT HTTP and SOCKS proxies are standard.
POP3 proxy must be configured as POP3 server and requires username in the form of: pop3username@pop3server. If POP3 proxy access must be authenticated, you can specify username as proxy_username:proxy_password:POP3_username@pop3server
DNS proxy resolves any types of records but only hostnames are cached. It requires nserver/nscache to be configured. If nserver is configured as TCP, redirections are applied on connection, so parent proxy may be used to resolve names to IP.
FTP proxy can be used as FTP server in any FTP client or configured as FTP proxy on a client with FTP proxy support. Username format is one of
Please note, if you use FTP client interface for FTP proxy do not add FTPpassword and FTPServer to username, because FTP client does it for you. That is, if you use 3proxy with authentication use proxyuser:proxypassword:FTPuser as FTP username, otherwise do not change original FTP user name

include <path>
Include config file

config <path>
Path to configuration file to use on 3proxy restart or to save configuration.

ReOpens configuration file for write access via Web interface, and re-reads it. Usually should be first command on config file but in combination with "config" it can be used anywhere to open alternate config file. Think twice before using it.

End of configuration

log [[@|&]logfile] [<LOGTYPE>]
sets logfile for all gateways
@ - (for Unix) use syslog, filename is used as ident name
& - use ODBC, filename consists of comma-delimited datasource,username,password (username and password are optional)
LOGTYPE is one of:
M - Monthly
W - Weekly (starting from Sunday)
D - Daily
H - Hourly
if logfile is not specified logging goes to stdout. You can specify individual logging options for gateway by using -l option in gateway configuration.
"log" command supports same format specifications for filename template as "logformat" (if filename contains '%' sign it's believed to be template). As with "logformat" filename must begin with 'L' or 'G' to specify Local or Grinwitch time zone for all time-based format specificators.

rotate <n>
how many archived log files to keep

logformat <format>
Format for log record. First symbol in format must be L (local time) or G (absolute Grinwitch time). It can be preceeded with -XXX+Y where XXX is list of characters to be filtered in user input (any non-printable characters are filtered too in this case) and Y is replacement character. For example, "-,%+ L" in the beginning of logformat means comma and percent are replaced with space and all time based elemnts are in local time zone.
You can use:

%y - Year in 2 digit format
%Y - Year in 4 digit format
%m - Month number
%o - Month abbriviature
%d - Day
%H - Hour
%M - Minute
%S - Second
%t - Timstamp (in seconds since 01-Jan-1970)
%. - milliseconds
%z - timeZone (from Grinvitch)
%D - request duration (in milliseconds)
%b - average send rate per request (in Bytes per second) this speed is typically below connection speed shown by download manager.
%B - average receive rate per request (in Bytes per second) this speed is typically below connection speed shown by download manager.
%U - Username
%N - service Name
%p - service Port
%E - Error code
%C - Client IP
%c - Client port
%R - Remote IP
%r - Remote port
%e - External IP used to establish connection
%Q - Requested IP
%q - Requested port
%n - requested hostname
%I - bytes In
%O - bytes Out
%h - Hops (redirections) count
%T - service specific Text
%N1-N2T - (N1 and N2 are positive numbers) - log only fields from N1 thorugh N2 of service specific text
in case of ODBC logging logformat specifies SQL statement, for exmample:
logformat "-'+_Linsert into log (l_date, l_user, l_service, l_in, l_out, l_descr) values ('%d-%m-%Y %H:%M:%S', '%U', '%N', %I, %O, '%T')"

logdump <in_traffic_limit> <out_traffic_limit>
Immediately creates additional log records if given amount of incoming/outgoing traffic is achieved for connection, without waiting for connection to finish. It may be useful to prevent information about long-lasting downloads on server shutdown.

archiver <ext> <commandline>
Archiver to use for log files. <ext> is file extension produced by archiver. Filename will be last argument to archiver, optionally you can use %A as produced archive name and %F as filename.

Sets timeout values
BYTE_SHORT - short timeout for single byte, is usually used for receiving single byte from stream.
BYTE_LONG - long timeout for single byte, is usually used for receiving first byte in frame (for example first byte in socks request).
STRING_SHORT - short timeout, for character string within stream (for example to wait between 2 HTTP headers)
STRING_LONG - long timeout, for first string in stream (for example to wait for HTTP request).
CONNECTION_SHORT - inactivity timeout for short connections (HTTP, POP3, etc).
CONNECTION_LONG - inactivity timeout for long connection (SOCKS, portmappers, etc).
DNS - timeout for DNS request before requesting next server
CHAIN - timeout for reading data from chained connection

nserver <ipaddr>[:port][/tcp]
Nameserver to use for name resolutions. If none specified or name server fails system routines for name resolution will be used. It's better to specify nserver because gethostbyname() may be thread unsafe. Optional port number may be specified. If optional /tcp is added to IP address, name resolution will be performed over TCP.

nscache <cachesize> nscache6 <cachesize>
Cache <cachesize> records for name resolution (nscache for IPv4, nscache6 for IPv6). Cachesize usually should be large enougth (for example 65536).

nsrecord <hostname> <hostaddr>
Adds static record to nscache. nscache must be enabled. If is used as a hostaddr host will never resolve, it can be used to blacklist something or together with dialer command to set up UDL for dialing.

All names are resolved to address. Usefull if all requests are redirected to parent proxy with http, socks4+, connect+ or socks5+.

dialer <progname>
Execute progname if external name can't be resolved. Hint: if you use nscache, dialer may not work, because names will be resolved through cache. In this case you can use something like http://dial.right.now/ from browser to set up connection.

internal <ipaddr>
sets ip address of internal interface. This IP address will be used to bind gateways. Alternatively you can use -i option for individual gateways. Since 0.8 version, IPv6 address may be used.

external <ipaddr>
sets ip address of external interface. This IP address will be source address for all connections made by proxy. Alternatively you can use -e option to specify individual address for gateway. Since 0.8 version External or -e can be given twice: once with IPv4 and once with IPv6 address.

maxconn <number>
sets maximum number of simulationeous connections to each services started after this command. Default is 100.

(depricated). Indicates 3proxy to behave as Windows 95/98/NT/2000/XP service, no effect for Unix. Not required for 3proxy 0.6 and above. If you upgraded from previous version of 3proxy use --remove and --install to reinstall service.

Should be specified to close console. Do not use 'daemon' with 'service'. At least under FreeBSD 'daemon' should preceed any proxy service and log commands to avoid sockets problem. Always place it in the beginning of the configuration file.

auth <authtype> [...]
Type of user authorization. Currently supported:
none - no authentication or authorization required.
Note: is auth is none any ip based limitation, redirection, etc will not work. This is default authentication type
iponly - authentication by access control list with username ignored.
Appropriate for most cases
useronly - authentication by username without checking for any password with authorization by ACLs. Useful for e.g. SOCKSv4 proxy and icqpr (icqpr set UIN / AOL screen name as a username)
dnsname - authentication by DNS hostnname with authorization by ACLs. DNS hostname is resolved via PTR (reverse) record and validated (resolved name must resolve to same IP address). It's recommended to use authcache by ip for this authentication. NB: there is no any password check, name may be spoofed.
strong - username/password authentication required. It will work with SOCKSv5, FTP, POP3 and HTTP proxy.
cache - cached authentication, may be used with 'authcache'.
Plugins may add additional authentication types.

It's possible to use few authentication types in the same commands. E.g.
auth iponly strong
In this case 'strong' authentication will be used only in case resource access can not be performed with 'iponly' authentication, that is username is required in ACL. It's usefull to protect access to some resources with password allowing passwordless access to another resources, or to use IP-based authentication for dedicated laptops and request username/password for shared ones.

authcache <cachtype> <cachtime>
Cache authentication information to given amount of time (cachetime) in seconds. Cahtype is one of:
ip - after successful authentication all connections during caching time from same IP are assigned to the same user, username is not requested.
ip,user username is requested and all connections from the same IP are assigned to the same user without actual authentication.
user - same as above, but IP is not checked.
user,password - both username and password are checked against cached ones.
Use auth type 'cache' for cached authentication

allow <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist> <weekdayslist> <timeperiodslist>
deny <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist> <weekdayslist> <timeperiodslist>
Access control entries. All lists are comma-separated, no spaces are allowed. Usernames are case sensitive (if used with authtype nbname username must be in uppercase). Source and target lists may contain IP addresses (W.X.Y.Z), ranges A.B.C.D - W.X.Y.Z (since 0.8) or CIDRs (W.X.Y.Z/L). Since 0.6, targetlist may also contain host names, instead of addresses. It's possible to use wildmask in the begginning and in the the end of hostname, e.g. *badsite.com or *badcontent*. Hostname is only checked if hostname presents in request. Targetportlist may contain ports (X) or port ranges lists (X-Y). For any field * sign means "ANY" If access list is empty it's assumed to be
allow *
If access list is not empty last item in access list is assumed to be
deny *
You may want explicitly add "deny *" to the end of access list to prevent HTTP proxy from requesting user's password. Access lists are checked after user have requested any resource. If you want 3proxy to reject connections from specific addresses immediately without any conditions you should either bind proxy to appropriate interface only or to use ip filters.

Operation is one of:
CONNECT - establish outgoing TCP connection
BIND - bind TCP port for listening
UDPASSOC - make UDP association
ICMPASSOC - make ICMP association (for future use)
HTTP_OTHER - over HTTP request
HTTP - matches any HTTP request except HTTP_CONNECT
FTP_GET - FTP get request
FTP_PUT - FTP put request
FTP_LIST - FTP list request
FTP_DATA - FTP data connection. Note: FTP_DATA requires access to dynamic non-ptivileged (1024-65535) ports on remote side.
FTP - matches any FTP/FTP Data request
ADMIN - access to administration interface
Weeksdays are week days numbers or periods, 0 or 7 means Sunday, 1 is Monday, 1-5 means Monday through Friday. Timeperiodlists is a list of time periods in HH:MM:SS-HH:MM:SS format. For example, 00:00:00-08:00:00,17:00:00-24:00:00 lists non-working hours.
parent <weight> <type> <ip> <port> <username> <password>
this command must follow "allow" rule. It extends last allow rule to build proxy chain. Proxies may be grouped. Proxy inside the group is selected randomly. If few groups are specified one proxy is randomly picked from each group and chain of proxies is created (that is second proxy connected through first one and so on). Weight is used to group proxies. Weigt is a number between 1 and 1000. Weights are summed and proxies are grouped together untill weight of group is 1000. That is:
allow *
parent 500 socks5 1080
parent 500 connect 3128
makes 3proxy to randomly choose between 2 proxies for all outgoing connections. These 2 proxies form 1 group (summarized weight is 1000).
allow * * * 80
parent 1000 socks5 1080
parent 1000 connect 3128
parent 300 socks4 1080
parent 700 socks5 1080
creates chain of 3 proxies:, and third is ( with probability of 0.3 or with probability of 0.7) for outgoing web connections.

type is one of:
tcp - simply redirect connection. TCP is always last in chain.
http - redirect to HTTP proxy. HTTP is always last chain.
pop3 - redirect to POP3 proxy (only local redirection is supported, can not be used for chaining)
ftp - redirect to FTP proxy (only local redirection is supported, can not be used for chaining)
connect - parent is HTTP CONNECT method proxy
connect+ - parent is HTTP CONNECT proxy with name resolution
socks4 - parent is SOCKSv4 proxy
socks4+ - parent is SOCKSv4 proxy with name resolution (SOCKSv4a)
socks5 - parent is SOCKSv5 proxy
socks5+ - parent is SOCKSv5 proxy with name resolution
socks4b - parent is SOCKS4b (broken SOCKSv4 implementation with shortened server reply. I never saw this kind ofservers byt they say there are). Normally you should not use this option. Do not mess this option with SOCKSv4a (socks4+).
socks5b - parent is SOCKS5b (broken SOCKSv5 implementation with shortened server reply. I think you will never find it useful). Never use this option unless you know exactly you need it.
admin - redirect request to local 'admin' service (with -s parameter).
Use "+" proxy only with "fakeresolve" option

IP and port are ip addres and port of parent proxy server. If IP is zero, ip is taken from original request, only port is changed. If port is zero, it's taken from original request, only IP is changed. If both IP and port are zero - it's a special case of local redirection, it works only with socks proxy. In case of local redirection request is redirected to different service, ftp locally redirects to ftppr pop3 locally redirects to pop3p http locally redurects to proxy admin locally redirects to admin -s service.

Main purpose of local redirections is to have requested resource (URL or POP3 username) logged and protocol-specific filters to be applied. In case of local redirection ACLs are revied twice: first, by SOCKS proxy up to 'parent' command and then with gateway service connection is redirected (HTTP, FTP or POP3) after 'parent' command. It means, additional 'allow' command is required for redirected requests, for example:
allow * * * 80
parent 1000 http 0
allow * * * 80 HTTP_GET,HTTP_POST
redirects all SOCKS requests with target port 80 to local HTTP proxy, local HTTP proxy parses requests and allows only GET and POST requests.
parent 1000 http 0
Changes external address for given connection to (an equivalent to -e1.2.3.4)
Optional username and password are used to authenticate on parent proxy. Username of '*' means username must be supplied by user.

nolog <n>
extends last allow or deny command to prevent logging, e.g.
allow * *

weight <n>
extends last allow or deny command to set weight for this request
allow * *
weight 100
Weight may be used for different purposes.

bandlimin <rate> <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
nobandlimin <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
bandlimout <rate> <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
nobandlimout <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
bandlim sets bandwith limitation filter to <rate> bps (bits per second) (if you want to specife bytes per second - multiply your value to 8). bandlim rules act in a same manner as allow/deny rules except one thing: bandwidth limiting is applied to all services, not to some specific service. bandlimin and nobandlimin applies to incoming traffic bandlimout and nobandlimout applies to outgoing traffic If tou want to ratelimit your clients with ip's (4 addresses) to 57600 bps you have to specify 4 rules like
bandlimin 57600 *
bandlimin 57600 *
bandlimin 57600 *
bandlimin 57600 *
and every of you clients will have 56K channel. If you specify
bandlimin 57600 *
you will have 56K channel shared between all clients. if you want, for example, to limit all speed ecept access to POP3 you can use
nobandlimin * * * 110
before the rest of bandlim rules.

counter <filename> <reporttype> <repotname>
countin <number> <type> <limit> <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
nocountin <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
countout <number> <type> <limit> <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>
nocountout <userlist> <sourcelist> <targetlist> <targetportlist> <operationlist>

counter, countin, nocountin, countout, noucountout commands are used to set traffic limit in MB for period of time (day, week or month). Filename is a path to a special file where traffic information is permanently stored. number is sequential number of record in this file. If number is 0 no traffic information on this counter is saved in file (that is if proxy restarted all information is loosed) overwise it should be unique sequential number. Type specifies a type of counter. Type is one of:
H - counter is resetted hourly
D - counter is resetted daily
W - counter is resetted weekly
M - counter is resetted monthely
reporttype/repotname may be used to generate traffic reports. Reporttype is one of D,W,M,H(hourly) and repotname specifies filename template for reports. Report is text file with counter values in format:
The rest of parameters is identical to bandlim/nobandlim.

users username[:pwtype:password] ...
pwtype is one of:
none (empty) - use system authentication
CL - password is cleartext
CR - password is crypt-style password
NT - password is NT password (in hex)
users test1:CL:password1 "test2:CR:$1$lFDGlder$pLRb4cU2D7GAT58YQvY49."
users test3:NT:BD7DFBF29A93F93C63CB84790DA00E63
Note: double quotes are requiered because password contains $ sign.

empty active access list. Access list must be flushed avery time you creating new access list for new service. For example:
allow *
allow *
sets different ACLs for pop3p and socks

system <command>
execute system command

pidfile <filename>
write pid of current process to file. It can be used to manipulate 3proxy with signals under Unix. Currently next signals are available:

monitor <filename>
If file monitored changes in modification time or size, 3proxy reloads configuration within one minute. Any number of files may be monitored.

setuid <uid>
calls setuid(uid), uid must be numeric. Unix only. Warning: under some Linux kernels setuid() works onle for current thread. It makes it impossible to suid for all threads.

setgid <gid>
calls setgid(gid), gid must be numeric. Unix only.

chroot <path>
calls chroot(path). Unix only.


plugin <path_to_shared_library> <function_to_call> [<arg1> ...]
Loads specified library and calls given export function with given arguments, as
int functions_to_call(struct pluginlink * pl, int argc, char * argv[]);
function_to_call must return 0 in case of success, value > 0 to indicate error.

filtermaxsize <max_size_of_data_to_filter>
If Content-length (or another data length) is greater than given value, no data filtering will be performed thorugh filtering plugins to avoid data corruption and/or Content-Length chaging. Default is 1MB (1048576).


Report all bugs to 3proxy@3proxy.ru

See Also

3proxy(8), proxy(8), ftppr(8), socks(8), pop3p(8), tcppm(8), udppm(8), syslogd(8),


3APA3A is pronounced as ``zaraza´´.


3proxy is designed by Vladimir 3APA3A Dubrovin (3proxy@3proxy.ru)

Referenced By


Explore man page connections for 3proxy.cfg(3).

3proxy 0.8 January 2016