Since it is allowing ipv6 and but blocking v4 it feels like an iptables/firewall setting blocking v4.
Are there any firewall/iptables rules on either node and if so what do they look like?
On Fri, May 14, 2021 at 7:39 AM Ed Greshko <ed.greshko@xxxxxxxxxxx> wrote:
On 14/05/2021 19:35, Robert McBroom via users wrote:
> On 5/12/21 6:46 PM, Ed Greshko wrote:
>> On 13/05/2021 04:05, Roger Heflin wrote:
>>> Do an "ip route" on both the source and destination nodes.
>>>
>>> also do an "ip neigh" on both.
>>>
>>> And an "ip link" on both.
>>
>> Yes, that would be very helpful if Robert would supply that information.
>> Thanks for making that suggestion
>
> Have to apologize. Cockpit error. The address should have been
>
> 192.168.1.211 instead of 192.168.1.112
>
> From the host system
Well, the information below would seem to be incomplete since you probably have not tried to access 192.168.1.211.
We do see FAILED for 192.168.1.112 since you've probably tried it and a host with that IP address doesn't exist.
You can see that for the IPv6 address of 2600:1702:4860:9dd0:210:75ff:fe28:5e30 the hwaddress of 00:10:75:28:5e:30
matches that of eth0 in the "ip link" results of the target system. That would indicate physical connectivity.
So, would you do these in order?
ip -4 add show
ping 192.168.1.211
traceroute -n 192.168.1.211
ip neigh
>
> [rm3]RobertPC ~]$ ip route
> default via 192.168.1.254 dev enp2s0 proto dhcp metric 100
> 10.237.214.0/24 via 192.168.1.254 dev enp2s0 proto static metric 100
> 192.168.1.0/24 dev enp2s0 proto kernel scope link src 192.168.1.185 metric 100
> [rm3@RobertPC ~]$ ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
> link/ether 00:1d:60:35:b8:13 brd ff:ff:ff:ff:ff:ff
> [rm3@RobertPC ~]$ ip neigh
> 192.168.1.254 dev enp2s0 lladdr 8c:5a:25:e4:56:b0 REACHABLE
> 192.168.1.111 dev enp2s0 FAILED
> 192.168.1.239 dev enp2s0 lladdr 00:00:c0:33:7b:6f STALE
> 192.168.1.112 dev enp2s0 FAILED
> fe80::6038:e0ff:fec2:54a8 dev enp2s0 lladdr 62:38:e0:c2:54:a8 router STALE
> 2600:1702:4860:9dd0:210:75ff:fe28:5e30 dev enp2s0 lladdr 00:10:75:28:5e:30 STALE
> fe80::8e5a:25ff:fee4:56b0 dev enp2s0 lladdr 8c:5a:25:e4:56:b0 router REACHABLE
> fe80::210:75ff:fe28:5e30 dev enp2s0 lladdr 00:10:75:28:5e:30 STALE
>
> from the target system
>
> [rm3@RobertPC ~]# ssh alarm@2600:1702:4860:9dd0:210:75ff:fe28:5e30
> alarm@2600:1702:4860:9dd0:210:75ff:fe28:5e30's password:
> Last login: Wed May 12 15:59:14 2021 from fe80::c466:3bc6:17fa:9268%eth0
> [alarm@alarm ~]$ ip route
> default via 192.168.1.253 dev eth0 proto dhcp src 192.168.1.211 metric 1024
> 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.211
> 192.168.1.253 dev eth0 proto dhcp scope link src 192.168.1.211 metric 1024
> [alarm@alarm ~]$ ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
> link/ether 00:10:75:28:5e:30 brd ff:ff:ff:ff:ff:ff
> [alarm@alarm ~]$ ip neigh
> 192.168.1.253 dev eth0 lladdr 62:38:e0:c2:54:a8 STALE
> 192.168.1.254 dev eth0 lladdr 8c:5a:25:e4:56:b0 STALE
> fe80::8e5a:25ff:fee4:56b0 dev eth0 lladdr 8c:5a:25:e4:56:b0 router STALE
> fe80::1eb5:75df:b84:98d1 dev eth0 lladdr 00:1d:60:35:b8:13 STALE
> 2600:1702:4860:9dd0:21d:60ff:fe35:b813 dev eth0 lladdr 00:1d:60:35:b8:13 DELAY
> fe80::6038:e0ff:fec2:54a8 dev eth0 lladdr 62:38:e0:c2:54:a8 router STALE
>
--
Remind me to ignore comments which aren't germane to the thread.
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