Description: Short Tutorial for Beginners of DeleGate. DeleGate is a multipurpose proxy server (caching, translation, routing, gatewaying, firewall, etc.) for multiple protocols (HTTP,FTP,NNTP,Telnet,etc.) running on multiple platforms (Unix, Windows, OS/2).
Keywords: proxy,cache,translation,gateway,firewall,SSL,SSLeay, WWW,HTTP,ICP,NNTP,POP,FTP,Telnet,UNIX,Windows,Win32,OS/2,free

## Short Tutorial for Beginners of DeleGate

This is a very short tutorial of DeleGate for beginners. See the reference manual (Manual.htm) and related documents for more details. A collection of usage examples at http://www.delegate.org/delegate/HowToDG.html might be helpful to see what you can do with DeleGate.

## Minumum instruction

a. The simplest way to use DeleGate as a HTTP proxy, on the port 8080, is like this:

        delegated -P8080 SERVER=http

where -Pxxxx specifies the port number used to accept request from clients, and SERVER=yyyy specifies the protocol name used to communicate with clients.

b. The validity and custody of cached data can be controlled using EXPIRE and CRON parameters.

        EXPIRE=1d CRON="0 * * * * -expire 2d"

c. DeleGate implicitly allows only access from networks local to the host of DeleGate. You can explicitly specify hosts, networks, or domains to be allowed using a PERMIT parameter like this:

        PERMIT="*:*:host1,123.123.123.123/255.255.255.0,*.my.domain,!bad.my.domain"

## A little advanced instruction

01. Execute DeleGate in debug mode (run in forground and put log to the console):

        delegated -v ...

02. Stop the DeleGate server running at the port 8080:

        delegated -P8080 -Fkill

03. Load and use configuration parameters at specified URL:

        delegated +=http://server/path/of/parameters.txt

04. Restrict network interface(s) to be used to accept clients' request:

        delegated -Phostname:8080 SERVER=http

05. Control the sequence of name resolution trials using multiple resolvers:

        RESOLV=dns,nis,file

06. Connect via Socks server(s) if the destination is not local to your site:

        CONNECT="cache,socks:*:!*.my.domain" SOCKS=sockshost

07. Forward any requests to another proxy:

        PROXY="proxyHost:8080:*"

08. Forward requests toward some destination servers to another proxy:

        PROXY="proxyHost:8080:!*.my.domain,!*.near.domain"

09. Relay an arbitrary TCP protocol to a specified server:

        SERVER=tcprelay://serverName:portNumber/

10. Forward arbitrary TCP protocols to another DeleGate:

        MASTER="delegateHost:8080:*"

11. Relay an arbitrary UDP protocol to a specified server:

        SERVER=udprelay://serverName:portNumber/

12. Bind the target server of DeleGate to provide the DeleGate as an origin server to clients:

        delegated -P80 SERVER=http://httpserver/

13. Restrict newsgroups to be provided to clients:

        delegated -P8119 SERVER=nntp://nntpserver/comp,misc,news

14. Merge multiple servers into a single virtual server using MOUNT parameter:

        SERVER=nntp MOUNT="= nntp://serv1/comp" MOUNT="= nntp://serv2/misc,news"

15. Gateway for HTTP clients to NNTP servers:

        SERVER=http MOUNT="/news1/* nntp://ns1/*" MOUNT="/news2/* nntp://ns2/*"

16. Use DeleGate as an origin HTTP server:

        -P80 SERVER=http MOUNT="/* /usr/local/www/*" REMITTABLE=file

17. Restrict destination hosts/nets/domains reachable via the DeleGate:

        PERMIT="*:*.reachable.domain:*"

Yutaka Sato <ysato AT delegate DOT org>