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Full Discussion: How to enable ping?a litte complex
Operating Systems Solaris How to enable ping?a litte complex Post 303015650 by Linusolaradm1 on Monday 9th of April 2018 01:34:27 PM
Old 04-09-2018
Quote:
Originally Posted by stomp
Code:
# Icmp     

iptables -A INPUT -p icmp -m icmp --icmp-type 0 -s 0/0 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT     
iptables -A INPUT -p icmp -m icmp --icmp-type 8 -s 0/0 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT

a) ICMP is stateless. So defining the state is senseless

b) ICMP Subtype 8 is echo Request, which you correctly defined on the INPUT Chain. ICMP Subtype 0 is "echo Reply" which is regulated at the OUTPUT chain since it is sent from the local host to the pinging party

c) Defining source -s 0/0 is of no use. Omit that and you have no restriction of source addresses.

d) I would assume the module icmp is automatically loaded when you specifiy -p icmp, so you can omit this too.

You can trace your paket filter more closely with additional log-rules before and after important Rules in your filter-definition.

Oh. Wait. I misunterstood. iptables is the pinging party....
Now I use this rule..same thing.

Code:
iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT

---------- Post updated at 12:34 PM ---------- Previous update was at 12:32 PM ----------

Quote:
Originally Posted by rbatte1
I think that this is most likely a routing problem. What is your routing table like?

Can you show us the output from ifconfig -a & netstat -rn on both sides? Remember that the target of the ping will have to be able to respond.



Robin
The route is ok..at least I think.

Code:
10.2.0.0        192.168.0.30    255.255.255.0   UG        0 0          0 bridge0

Maybe is bridge causing problems?
I retry tomorrow wirth eth with no bridge.
 

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LEARN ABOUT MOJAVE

tc-csum

Checksum action in tc(8)                                               Linux                                              Checksum action in tc(8)

NAME

       csum - checksum update action

SYNOPSIS

       tc ... action csum UPDATE

       UPDATE := TARGET [ UPDATE ]

       TARGET := { ip4h | icmp | igmp | tcp | udp | udplite | sctp | SWEETS }

       SWEETS := { and | or | + }

DESCRIPTION

       The csum action triggers checksum recalculation of specified packet headers. It is commonly used to fix incorrect checksums after the pedit
       action has modified the packet content.

OPTIONS

       TARGET Specify which headers to update: IPv4 header (ip4h), ICMP header (icmp), IGMP header (igmp), TCP header  (tcp),  UDP  header  (udp),
              UDPLite header (udplite) or SCTP header (sctp).

       SWEETS These are merely syntactic sugar and ignored internally.

EXAMPLES

       The following performs stateless NAT for incoming packets from 192.0.2.100 to new destination 198.51.100.1. Assuming these are UDP packets,
       both IP and UDP checksums have to be recalculated:

              # tc qdisc add dev eth0 ingress handle ffff:
              # tc filter add dev eth0 prio 1 protocol ip parent ffff: 
                   u32 match ip src 192.0.2.100/32 flowid :1 
                   action pedit munge ip dst set 198.51.100.1 pipe 
                   csum ip and udp

SEE ALSO

       tc(8), tc-pedit(8)

iproute2                                                            11 Jan 2015                                           Checksum action in tc(8)
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