LAN issue and I cannot connect to 127.0.0.1

[Template]

Hello everyone


I am experiencing some issues on my LAN network from my mac book pro. I am trying to connect to LAN servers on various different pieces of software running on different machines but my mac is unable to pickup and connect to the external servers on 127.0.0.1.

I have the suspicion that it could be something to do with my localhost connection. I cannot connect to 127.0.0.1 when I use “Ping 127.0.0.1” or “Ping Localhost”, it returns nothing.

Further information;
I can connect to the internet fine.

I have a default hosts file

I have disabled my firewalls and my little snitch program

I am running a Mac book pro on OSX Mavericks 10.9.2

Here are a few commands that I have found from other support threads that could be relevant in diagnosing the problem,



Dig localhost

; <<>> DiG 9.8.3-P1 <<>> localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11015
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0



;; QUESTION SECTION:
;localhost. IN A



;; ANSWER SECTION:
localhost. 0 IN A 127.0.0.1



;; Query time: 3 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Thu May 19 22:48:02 2016

;; MSG SIZE rcvd: 43

ifconfig

lo0: flags=8149<UP,LOOPBACK,RUNNING,PROMISC,MULTICAST> mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=1<PERFORMNUD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=10b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV>
ether a8:20:66:48:03:bd
nd6 options=1<PERFORMNUD>
media: autoselect (none)
status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 5c:96:9d:82:39:93
inet6 fe80::5e96:9dff:fe82:3993%en1 prefixlen 64 scopeid 0x5
inet 192.168.1.156 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=1<PERFORMNUD>
media: autoselect
status: active
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
options=60<TSO4,TSO6>
ether d2:00:11:e3:c2:80
media: autoselect <full-duplex>
status: inactive
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
lladdr 10:dd:b1:ff:fe:1e:3c:28
nd6 options=1<PERFORMNUD>
media: autoselect <full-duplex>
status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
ether aa:20:66:84:8d:00
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x2
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 6 priority 0 path cost 0
nd6 options=1<PERFORMNUD>
media: <unknown type>
status: inactive
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
ether 0e:96:9d:82:39:93
media: autoselect

status: inactive

P.S there is not any information in that code that people could use for malicious attacks is there and If there is could you be kind enough to let me know?

Thank you,

T

 

[cradom]

127.0.0.1 and localhost is your computer. I doubt you'll be able to ping it, what's the point? There are no servers external or otherwise running unless you're running Apache web server or some other server like Telnet.

 

[Template]

Hello cradom
Thanks for the reply I am one step closer to identifying the problem!



The first program I am having issues connecting to is running on wine on one machine being my main machine the macbook pro and it won't make the connection to itself.



A separate application for which I am trying to connect to for different reasons is on another windows machine connected on the same network.



I am unable to connect to either of these applications from my mac and I should be able to. The first connection is operating on localhost 127.0.01 and won’t connect and the second completely different application called Vienna Ensemble Pro 5 that is operating a server over the LAN network and I cannot connect to it.



I assume these to problems are somehow related.



Would you have any suggestions toward diagnosing this issue?



Thank you,

A

 

[gsahli]

As cradom said - 127.0.0.1 is "on this local computer." You can't reach any other computer using that as an IP address.

 

[Template]

Hello gsahil

I have managed to fix the issue by removing my .plist files in ~/Library/preferences

Thank you to you both, you have taught me about what 127.0.0.1 means

Regards,
A