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Operating Systems Linux Red Hat networking problems with ftp,telnet, ssh, http Post 302310707 by Kainu on Sunday 26th of April 2009 03:25:35 PM
Old 04-26-2009
Hi,

Thanks for your answer sysgate. Youīve got it rigth, I canīt establish any data transfer session even though network connection seems to be OK. Here some answers to your questions.

1) Iīve tried to SSH, telnet and ftp several public sites. All these programs just hault, they seem be waiting some response that never comes. The process go to 'idle' state very soon after execution, network monitor shows some send/receive activity.

2) Network settings come from DHCP. IP address looks to be OK. I tried to disable ipv6 also but it didnīt help.

3) No proxies involved, direct connection to internet using Zyxel ADSL/WLAN box.

4) I have root access.

5) I have MS Vista installed also in the same machine. It setups the network automatically and connecto to internet without any problems.

6) I tried RHEL 5 server version too, no success

7) After RHEL I decided to try Fedora 10. Setup was done the same way and everything works fine eith it. The settings seem to be pretty much similar, the only differences Iīve found so far is that in Fedora the HOST name in prompt is 'localhost' as in RHEL it's 'DHCPPC'. Fedora also has xinetd.d service available that were missing form RHEL installation. That might be the reason?

I think I go with Fedora for a while and take copy of itīs config files for comparison before trying RHEL again.
 

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ssh-http-proxy-connect(1)					   User Commands					 ssh-http-proxy-connect(1)

NAME
ssh-http-proxy-connect - Secure Shell proxy for HTTP SYNOPSIS
/usr/lib/ssh/ssh-http-proxy-connect [-h http_proxy_host] [-p http_proxy_port] connect_host connect_port DESCRIPTION
A proxy command for ssh(1) that uses HTTP CONNECT. Typical use is where connections external to a network are only allowed via a proxy web server. OPTIONS
The following options are supported: -h http_proxy_host Specifies the proxy web server through which to connect. Overrides the HTTPPROXY and http_proxy environment vari- ables if they are set. -p http_proxy_port Specifies the port on which the proxy web server runs. If not specified, port 80 is assumed. Overrides the HTTP- PROXYPORT and http_proxy environment variables if they are set. OPERANDS
The following operands are supported: http_proxy_host The host name or IP address (IPv4 or IPv6) of the proxy. http_proxy_port The numeric port number to connect to on http_proxy_host. connect_host The name of the remote host to which the proxy web server is to connect you. connect_port The numeric port number of the proxy web server to connect you to on http_proxy_host. EXAMPLES
The recommended way to use a proxy connection command is to configure the ProxyCommand in ssh_config(4) (see Example 1 and Example 2). Example 3 shows how the proxy command can be specified on the command line when running ssh(1). Example 1: Setting the proxy from the environment The following example uses ssh-http-proxy-connect in ssh_config(4) when the proxy is set from the environment: Host playtime.foo.com ProxyCommand /usr/lib/ssh/ssh-http-proxy-connect playtime.foo.com 22 Example 2: Overriding proxy environment variables The following example uses ssh-http-proxy-connect in ssh_config(4) to override (or if not set) proxy environment variables: Host playtime.foo.com ProxyCommand /usr/lib/ssh/ssh-http-proxy-connect -h webcache -p 8080 playtime.foo.com 22 Example 3: Using the command line The following example uses ssh-http-proxy-connect from the ssh(1) command line: example$ ssh -o'ProxyCommand="/usr/lib/ssh/ssh-http-proxy-connect -h webcache -p 8080 playtime.foo.com 22"' playtime.foo.com ENVIRONMENT VARIABLES
HTTPPROXY Takes the http_proxy_host operand to specify the default proxy host. Overrides http_proxy if both are set. HTTPPROXYPORT Takes the http_proxy_port operand to specify the default proxy port. Ignored if HTTPPROXY is not set. http_proxy URL format for specifying proxy host and port. EXIT STATUS
The following exit values are returned: 0 Successful completion. 1 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsshu | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ SEE ALSO
ssh(1), ssh-socks5-proxy-connect(1), ssh_config(4), attributes(5) SunOS 5.10 24 Oct 2001 ssh-http-proxy-connect(1)
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