man afserver (1): active port forwarder server

SYNOPSIS

afserver [ options ]

DESCRIPTION

Afserver is a port forwarding program designed to be efficient and easy to use. It listens for incoming afclient connections at listenport (default listenport is 50126). After successful client authorization, afserver listens for incoming user connections. When a new user connection is opened, all the data is redirected to previously connected afclient, which redirects it to the specified destination host:port.

EXAMPLES

afserver
  program starts with default options (become a daemon)
   afserver -v
  verbose mode is enabled (program won't enter daemon mode)
   afserver -n localhost -l 5435 -m 6375
  program will listen on localhost:5435 for users and on localhost:6375 for clients

OPTIONS

Basic options

-n, --hostname NAME
used when creating listening sockets (default: '')

-l, --listenport [HOST:]PORT
listening [host:]port number - users connect to it (default: 50127)

-m, --manageport [HOST:]PORT
manage [host:]port number - afclient connects to it (default: 50126)

-V, --version
display version number

-h, --help
prints help screen

Authorization

--pass PASSWORD
password used for client identification (default: no password)

Configuration

-c, --cerfile FILE
the name of the file with certificate (default: server-cert.pem)

-A, --cacerfile FILE
the name of the file with CA certificates (if used, require clients to have valid certificates)

-d, --cerdepth
the maximum depth of valid certificate-chains

-k, --keyfile FILE
  the name of the file with RSA key (default: server.rsa)
   -f, --cfgfile FILE
  the name of the file with the configuration for the afserver

-D, --dateformat FORMAT
format of the date printed in logs (see 'man strftime' for details) (default: %d.%m.%Y %H:%M:%S)

-t, --timeout N
the timeout value for the client's connection (default: 5)

--maxidle N
the maximum idle time for the client's connection (default: disabled)

-u, --users N
the amount of users allowed to use this server (default: 5)

-C, --clients N
the number of allowed clients to use this server (default: 1)

-r, --realm
set the realm name (default: none)

-R, --raclients N
the number of allowed clients in remote administration mode to use this server (default: 1)

-U, --usrpcli N
the number of allowed users per client (default: $users)

-M, --climode N
  strategy used to connect users with clients (default: 1)
  Available strategies:
    1. fill first client before go to next

-p, --proto TYPE
type of server (tcp|udp) - what protocol it will be operating for (default: tcp)

-b, --baseport
listenports are temporary and differ for each client

-a, --audit
additional information about connections are logged

--nossl
ssl is not used to transfer data (but it's still used to establish a connection) (default: ssl is used)

--nozlib
zlib is not used to compress data (default: zlib is used)

--dnslookups
try to obtain dns names of the computers rather than their numeric IP

Logging

-o, --log LOGCMD
  log choosen information to file/socket
   -v, --verbose
  to be verbose - program won't enter the daemon mode (use several times for greater effect)

IP family

-4, --ipv4
  use ipv4 only
   -6, --ipv6
  use ipv6 only

HTTP PROXY

-P, --enableproxy
enable http proxy mode

REMOTE ADMINISTRATION

Currently available commands are:

help
display help

lcmd
lists available commands

info
prints info about server

rshow
display realms

cshow X
display clients in X realm

ushow X
display users in X realm

quit
quit connection

timeout N X
set timeout value in X realm

audit {0|1} X
set audit mode in X realm

dnslookups {0|1} X
set dnslookups mode in X realm

dateformat S
set dateformat

kuser S
kick user named S

kclient N
kick client with number N

LOGCMD FORMAT

LOGCMD has the following synopsis: target,description,msgdesc

Where target is file or sock

description is filename or host,port

and msgdesc is the subset of:

LOG_T_ALL, LOG_T_USER, LOG_T_CLIENT, LOG_T_INIT, LOG_T_MANAGE, LOG_T_MAIN, LOG_I_ALL, LOG_I_CRIT, LOG_I_DEBUG, LOG_I_DDEBUG, LOG_I_INFO, LOG_I_NOTICE, LOG_I_WARNING, LOG_I_ERR

written without spaces.

Example:

file,filename,LOG_T_ALL,LOG_I_CRIT,LOG_I_ERR,LOG_I_WARNING

BUGS

Afserver is still under development. There are no known open bugs at the moment.

REPORTING BUGS

Please report bugs to <jeremian [at] poczta.fm>

AUTHOR

Jeremian <jeremian [at] poczta.fm>

CONTRIBUTIONS

Alex Dyatlov <alex [at] gray-world.net>, Simon <scastro [at] entreelibre.com>, Ilia Perevezentsev <iliaper [at] mail.ru> Marco Solari <marco.solari [at] koinesistemi.it>, and Joshua Judson Rosen <rozzin [at] geekspace.com>