Computers located behind a firewall or within an Intranet probably have a proxy server to access Internet servers. Portable Offline Browser currently supports HTTP, SOCKS 4, SOCKS 5, RTSP and User@Site type proxies.

To determine the type of proxy server in place, start your favorite Web browser and check its settings. To establish proxy settings you must know the address of the proxy server and the port on which it is listening for requests. AutoDetect button will get current proxy settings from MS Internet Explorer browser.

A user name and password may be necessary to access some HTTP proxy servers. If your proxy server requires NTLM authentication, please add your domain to the user name field. It should be separated by a backslash symbol this way:

DOMAIN\username

The User@Site type proxy is implemented in WinGate.

PASV mode is used for FTP downloads when behind a firewall.

If you are unsure of the proxy server parameters, try clicking the "Auto Detect" button, which gets proxy settings from MS Internet Explorer. If this doesn't help, consult with your network administrator.

Tip: The most common port numbers for HTTP proxy are 80, 800, 808, 8000, 8080, 3128. The SOCKS proxy server usually occupies port 1080. User@Site proxy is located at port 21 by default.

You may specify a list of proxy servers. Offline Explorer will use next record for each new file download it starts.

Alternative download method uses WinInet library from MS Internet Explorer. It makes better compatibility when downloading sites with authorization forms on pages.

PASV mode for FTP connections is a more compatible way which doesn't require to open active ports on client side to download FTP sites.