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Full Discussion: Connectivity check.
Special Forums IP Networking Connectivity check. Post 302487148 by kduffin on Tuesday 11th of January 2011 02:32:48 PM
Old 01-11-2011
If traceroute isn't working, ping likely won't be either - blocking ICMP at the edge is common enough. Trying a ping utility that uses UDP (hping) is worth trying too. If you're already dealing with security at the edge that's limiting the aforementioned protocols, it isn't likely that ssh is going to be allowed directly either. Telnet is an option if the host serves up protocols you are aware of - just telnet to the actual socket 'telnet <ip> <port>'. If all else fails, try an nmap (disable the ping) and see what ports are open.

Cheers,

Keith
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RDS-PING(1)						    BSD General Commands Manual 					       RDS-PING(1)

NAME
rds-ping -- test reachability of remote node over RDS SYNOPSIS
rds-ping [-c count] [-i interval] [-I local_addr] remote_addr DESCRIPTION
rds-ping is used to test whether a remote node is reachable over RDS. Its interface is designed to operate pretty much the standard ping(8) utility, even though the way it works is pretty different. rds-ping opens several RDS sockets and sends packets to port 0 on the indicated host. This is a special port number to which no socket is bound; instead, the kernel processes incoming packets and responds to them. OPTIONS
The following options are available for use on the command line: -c count Causes rds-ping to exit after sending (and receiving) the specified number of packets. -I address By default, rds-ping will pick the local source address for the RDS socket based on routing information for the destination address (i.e. if packets to the given destination would be routed through interface ib0, then it will use the IP address of ib0 as source address). Using the -I option, you can override this choice. -i timeout By default, rds-ping will wait for one second between sending packets. Use this option to specified a different interval. The timeout value is given in seconds, and can be a floating point number. Optionally, append msec or usec to specify a timeout in milliseconds or microseconds, respectively. Specifying a timeout considerably smaller than the packet round-trip time will produce unexpected results. AUTHORS
rds-ping was written by Olaf Kirch <olaf.kirch@oracle.com>. SEE ALSO
rds(7), rds-info(1), rds-stress(1). BSD
Apr 22, 2008 BSD
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