How to enable ping?a litte complex Post: 303015700

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Operating Systems Solaris How to enable ping?a litte complex Post 303015700 by stomp on Tuesday 10th of April 2018 11:36:35 AM

04-10-2018

Registered User

Code:

17:14:52.804665 IP 192.168.0.2 > 10.2.0.1: ICMP echo request, id 15645, seq 1, length 64 
17:14:52.806881 IP 192.168.0.30 > 192.168.0.2: ICMP echo reply, id 15645, seq 1, length 64 
17:14:52.807016 IP 192.168.0.2 > 192.168.0.30: ICMP host 192.168.0.2 unreachable - admin prohibited, length 92

Well that shows pretty obvious, what's going on:

The icmp echo request goes out to the target
The icmp echo reply comes back from the target
The local host rejects the echo reply and sends itself another icmp message for the failed echo reply

So this points to your client machine, sending the ping, that the paket filter is configured wrongly.

Please show the current rules as requested in my previous post(iptables -L -v- n).

When you execute your ping, and watch the counters with the above given watch command, which rules seem to match for the icmp packages?

Last edited by stomp; 04-10-2018 at 01:11 PM..

stomp

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LEARN ABOUT FREEBSD

nos-tun

NOS-TUN(8)						    BSD System Manager's Manual 						NOS-TUN(8)

NAME

     nos-tun -- implement ``nos'' or ``ka9q'' style IP over IP tunnel

SYNOPSIS

     nos-tun -t tunnel -s source -d destination -p protocol_number [source] target

DESCRIPTION

     The nos-tun utility is used to establish an nos style tunnel, (also known as ka9q or IP-IP tunnel) using a tun(4) kernel interface.

     Tunnel is the name of the tunnel device /dev/tun0 for example.

     Source and destination are the addresses used on the tunnel device.  If you configure the tunnel against a cisco router, use a netmask of
     ``255.255.255.252'' on the cisco.	This is because the tunnel is a point-to-point interface in the FreeBSD end, a concept cisco does not
     really implement.

     Protocol number sets tunnel mode.	Original KA9Q NOS uses 94 but many people use 4 on the worldwide backbone of ampr.org.

     Target is the address of the remote tunnel device, this must match the source address set on the remote end.

EXAMPLES

     This end, a FreeBSD box on address 192.168.59.34:

	   nos-tun -t /dev/tun0 -s 192.168.61.1 -d 192.168.61.2 192.168.56.45

     Remote cisco on address 192.168.56.45:

	   interface tunnel 0
	   ip address 192.168.61.2 255.255.255.252
	   tunnel mode nos
	   tunnel destination 192.168.59.34
	   tunnel source 192.168.56.45

AUTHORS

     Nickolay N. Dudorov <nnd@itfs.nsk.su> wrote the program, Poul-Henning Kamp <phk@FreeBSD.org> wrote the man-page.  Isao SEKI
     <iseki@gongon.com> added a new flag, IP protocol number.

BUGS

     We do not allow for setting our source address for multihomed machines.

BSD
								  April 11, 1998							       BSD