Hm.
Does
ipables -L
say something interesting ?
Or can Wireshark help to find out what’s going on ?
> Am 24.01.2017 um 14:33 schrieb Mark Rivers <[email protected]>:
>
> I'm trying to help Sunny to connect from Linux to a serial port on a Moxa box. It is not working, and I am stumped, so any ideas are welcome.
>
> From Windows he can telnet to it:
>
>> when I telnet from windows
>> telnet 192.168.127.254 4001
>> It prompts a blank screen and for other IP or ports like 192.168.127.254 5064, 192.168.127.34 4732 etc. it simply says host not available so I think port 4001 should be good.
>
> When he connects it to Linux he can ping it:
>
> ping 192.168.127.254
> PING 192.168.127.254 (192.168.127.254) 56(84) bytes of data.
> 64 bytes from 192.168.127.254<http://192.168.127.254>: icmp_seq=1 ttl=255 time=1.69 ms
> 64 bytes from 192.168.127.254<http://192.168.127.254>: icmp_seq=2 ttl=255 time=0.797 ms
> 64 bytes from 192.168.127.254<http://192.168.127.254>: icmp_seq=3 ttl=255 time=0.753 ms
>
> ifconfig looks OK:
> eth0 Link encap:Ethernet HWaddr D8:CB:8A:9C:61:96
> inet addr:192.168.127.0 Bcast:192.168.127.255 Mask:255.255.255.0
> inet6 addr: fe80::dacb:8aff:fe9c:6196/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:16 errors:0 dropped:0 overruns:0 frame:0
> TX packets:63 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:1454 (1.4 Kb) TX bytes:10799 (10.5 Kb)
>
> arp looks good:
> sbin/arp
>
> Address HWtype HWaddress Flags Mask Iface
> 10.128.0.254 ether 00:00:5e:00:01:83 C eth1
> 10.128.0.99 ether 00:04:96:6d:67:7f C eth1
> 10.128.0.253 ether 00:04:96:15:5e:70 C eth1
> 10.128.0.238 ether 00:04:96:27:50:63 C eth1
> 10.128.0.244 ether 00:04:96:34:ea:f2 C eth1
> 10.128.0.252 ether 00:04:96:28:24:ce C eth1
> 10.128.0.237 ether 00:04:96:51:a8:8b C eth1
> 192.168.127.254 ether 00:90:e8:4e:6e:4e C eth0
> 10.128.0.251 ether 00:04:96:16:c7:50 C eth1
> 10.128.0.249 ether 00:04:96:05:7a:13 C eth1
> 10.128.0.247 ether 00:04:96:36:54:da C eth1
> 10.128.0.246 ether 00:04:96:21:d6:10 C eth1
>
> The firewall is disabled:
> systemctl status SuSEfirewall2.service
>
> SuSEfirewall2 phase 2
> Loaded: loaded (/usr/lib/systemd/system/SuSEfirewall2.service; disabled)
> Active: inactive (dead)
>
> But when he tries to telnet from the Linux box it times out:
>
> telnet 192.168.127.254 4001
> Trying 192.168.127.254...
> telnet: connect to address 192.168.127.254<http://192.168.127.254>: Connection timed out
>
> Any ideas what could be causing this?
>
> Thanks,
> Mark
>
>
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