More info needed: * What is the router? What is it running (i.e. stock vs 3rd party firmware); * Have you tried power cycling the router? * Have you looked at dmesg -T on your problematic laptop? * Have you looked at iptables on your problematic laptop?
On Tue, Dec 11, 2018 at 5:32 PM David Fleck <dcfl...@protonmail.ch> wrote: > My wife and I have 2 practically identical ThinkPad laptops, both running > OpenSUSE 42.3. They connect to a wireless router via DHCP. We also have > several desktop machines (Linux & FreeBSD) with static IP addresses. All > the machines are connected by a router. Both laptops can see the router, > the outside world, and each other. But one laptop can see all the > desktops, and the other one can't see any of them. The desktops can't see > the one laptop, either. > > As far as I can see, the routing tables are the same on both laptops: > m2:~ # route ### This is the non-connecting laptop > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > default 192.168.1.1 0.0.0.0 UG 600 0 0 > wlan0 > 192.168.1.0 * 255.255.255.0 U 600 0 0 > wlan0 > > dcf:~> route ### This is the connecting laptop > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > default 192.168.1.1 0.0.0.0 UG 600 0 0 > wlan0 > 192.168.1.0 * 255.255.255.0 U 600 0 0 > wlan0 > > But when I try to ping from the non-connecting laptop: > m2:~ # ping 192.168.1.9 > PING 192.168.1.9 (192.168.1.9) 56(84) bytes of data. > ^C > --- 192.168.1.9 ping statistics --- > 5 packets transmitted, 0 received, 100% packet loss, time 3999ms > > whereas: > dcf:~> ping 192.168.1.9 > PING 192.168.1.9 (192.168.1.9) 56(84) bytes of data. > 64 bytes from 192.168.1.9: icmp_seq=1 ttl=64 time=9.59 ms > 64 bytes from 192.168.1.9: icmp_seq=2 ttl=64 time=0.960 ms > 64 bytes from 192.168.1.9: icmp_seq=3 ttl=64 time=0.960 ms > > I'm flummoxed. Everything I can think to look at on the non-connecting > laptop looks right, but the machines simply don't 'see' each other, even > though they can see other machines on the network and there is no > difference in network topology distinguishing connecting and non-connecting > machines. Reboots (of desktops and the laptop) haven't helped. > > Last data point: this was all working correctly 24 hours ago. > > -- > - David Fleck > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
