[WNYLUG-Users] Port Forwarding

Joe LaVigne joe at hits-buffalo.com
Wed Mar 21 05:18:38 EDT 2012


You are already using a dhcp server. Your router. Look at the settings pages, and find the settings for internal lan/dhcp and see if there are settings for static assignment.

You'll need to enter the mac address, and the ip you want it to have, then everytime you boot your laptop on your lan, you should get the same ip. 
-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

josephj at main.nc.us wrote:

That sounds perfect, with one problem: I know what a dhcp server is and
that's about all I know about dhcp. And, aside from bittorrent, where I
didn't have to do anything, I've never set up any server.

Joe

> OR, you could set your dhcp server to always give your laptop the same
> IP address, and not have to worry about it again...
>
> Joe
>
>
> On 03/20/2012 01:30 PM, josephj at main.nc.us wrote:
>> First reply got sent by accident.
>>
>> HTML gone. Thank you.
>>
>> I don't like upnp either. When I tried it a few years ago, it cluttered
>> my router with a bunch of "one-time" rules. As for the rest of your
>> reply
>> and the dns example, I didn't quite understand it.
>>
>> It would be nice to do, but it's not a very big deal to define one rule
>> per possible ip and just see which ip I have today and adjust the port
>> accordingly.
>>
>> I suppose I can write a script that retrieves my IP and then tells me
>> what
>> port to use (pretty easy in bash).
>>
>> Joe
>>
>>>
>>> On 03/20/2012 03:16 AM, josephj at main.nc.us wrote:
>>>> Pete: Are you posting to the list in HTML? Normally, it wouldn't be a
>>>> problem, but, for now, I don't have Thunderbird fully installed where
>>>> it
>>>> needs to be and my webmail system puts all the HTML from your messages
>>>> into my replies as text and I have to remove them by hand - which is a
>>>> real drag. I'm not seeing this problem on anybody else's posts.
>>> How about now?
>>>> I love it when things start working for no apparent reason. I didn't
>>>> do
>>>> anything that I'm aware of, but now, my second rule, port 5191 to 5191
>>>> tcp
>>>> to 127.0.0.101 works.
>>> I only suggested to test 127.0.0.1 to start diagnosing at a most basic
>>> level. You can't port forward to this address because it is not
>>> individual (everyone has it) and it's only internally accessible.
>>> You'll
>>> need to use the IP address of the box itself.
>>>> I had to do a different nmap command (lifted from the man page) to see
>>>> the
>>>> ports.
>>>>
>>>> Remaining question (assuming things continue to work):
>>>>
>>>> How can I configure the router to do
>>>> "open port 5190 for me no matter what my local ip is." (My ip (in
>>>> bash
>>>> pattern lingo) will probably be 192.168.1.10[0123])?
>>> Not recommended. This could be accomplished with upnp on the router but
>>> I've never liked the idea of routers creating port forwards all by
>>> themselves. Without that option, your scenario would be like having a
>>> public IP assigned to a DNS entry and then the IP changing, thereby
>>> breaking the DNS entry, but this would all be on the inside.
>>>> Thanks.
>>>> Joe
>>>>
>>>> shelelia at halo:~$ nmap -A -T4 127.0.0.1
>>>>
>>>> Starting Nmap 5.21 ( http://nmap.org ) at 2012-03-20 02:40 EDT
>>>> Nmap scan report for localhost (127.0.0.1)
>>>> Host is up (0.00022s latency).
>>>> Not shown: 996 closed ports
>>>> PORT STATE SERVICE VERSION
>>>> 22/tcp open ssh OpenSSH 5.8p1 Debian 7ubuntu1 (protocol
>>>> 2.0)
>>>> | ssh-hostkey: 1024 6f:c9:34:81:ed:f3:6d:1a:16:5f:8d:7d:36:95:00:b4
>>>> (DSA)
>>>> |_2048 05:2d:5e:21:62:57:38:c1:cc:43:7c:6b:3a:44:08:e0 (RSA)
>>>> 631/tcp open ipp CUPS 1.4
>>>> 902/tcp open ssl/vmware-auth VMware Authentication Daemon 1.10 (Uses
>>>> VNC, SOAP)
>>>> 5190/tcp open tcpwrapped
>>>> Service Info: OS: Linux
>>>>
>>>> Service detection performed. Please report any incorrect results at
>>>> http://nmap.org/submit/ .
>>>> Nmap done: 1 IP address (1 host up) scanned in 6.26 seconds
>>>> shelelia at halo:~$
>>>>> on the .101 box
>>>>> nmap -sP 127.0.0.1
>>>>> and see if the port is actually open and correct.
>>>>>
>>>>> on the router, make sure you don't have a port range forward
>>>>> setup
>>>>> that your overlapping with a single port forward
>>>>> I have a Time Warner Internet connection with a Linksys
>>>>> WRT54G wireless
>>>>> router. (I switched it to HTTP and WPA and it works now.)
>>>>>
>>>>> I want to get port forwarding to work.
>>>>>
>>>>> I have an application that I use on port 5190. When I hook the
>>>>> notebook
>>>>> directly to the modem, the port is open, so there doesn't appear to
>>>>> be
>>>>> any
>>>>> problem on the ISP end.
>>>>>
>>>>> I went into the router and selected Applications and Gaming. I set
>>>>> up
>>>>> a
>>>>> rule: start 5190, end 5190, Both protocols, to 192.168.1.100 and
>>>>> another
>>>>> rule for 5191 to 5191, both, to 192.168.1.101.
>>>>>
>>>>> 5190 times out and 5191 gets refused. (tested using
>>>>> http://www.canyouseeme.org">www.canyouseeme.org)
>>>>>
>>>>> ifconfig says wlan0 is at 192.168.1.101
>>>>> I think it's at 101 instead of 100 because I had the notebook
>>>>> connected
>>>>> by
>>>>> Ethernet cable just before I did this.
>>>>>
>>>>> 1) How do I fix this?
>>>>>
>>>>> 2) I would like the port to be open at whatever local ip address gets
>>>>> assigned to my notebook. I told the router to allow 4 connections,
>>>>> so
>>>>> do
>>>>> I have to set up one rule for each ...100 to ...103? The router
>>>>> didn't
>>>>> seem to want to do that for 100 and 101. It complained about port
>>>>> ranges
>>>>> overlapping. I don't want to have to look at the ip that gets
>>>>> assigned
>>>>> to
>>>>> my notebook and then change what port I'm using because of that.
>>>>>
>>>>> Is there a way to do this that doesn't involve too much rocket
>>>>> science?
>>>>>
>>>>> 3) Given that I do not have any vms running at the moment, why do
>>>>> vmnet1
>>>>> and vmnet8 show up at all? Is that normal?
>>>>>
>>>>> I originally ran my Windows 7 vm using vmware player ad then
>>>>> converted
>>>>> it
>>>>> to VirtualBox. (Again, it's not running now.)
>>>>>
>>>>> TIA
>>>>>
>>>>> Joe
>>>>>
>>>>> shelelia at halo:~/pq$ ifconfig
>>>>> eth0 Link encap:Ethernet HWaddr 00:23:18:08:37:93
>>>>> inet6 addr: fe80::223:18ff:fe08:3793/64 Scope:Link
>>>>> UP BROADCAST MULTICAST MTU:1500 Metric:1
>>>>> RX packets:25833 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:17296 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:6673182 (6.6 MB) TX bytes:1998361 (1.9 MB)
>>>>> Interrupt:20 Memory:d4600000-d4620000
>>>>>
>>>>> lo Link encap:Local Loopback
>>>>> inet addr:127.0.0.1 Mask:255.0.0.0
>>>>> inet6 addr: ::1/128 Scope:Host
>>>>> UP LOOPBACK RUNNING MTU:16436 Metric:1
>>>>> RX packets:1536 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:1536 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:0
>>>>> RX bytes:123684 (123.6 KB) TX bytes:123684 (123.6 KB)
>>>>>
>>>>> vmnet1 Link encap:Ethernet HWaddr 00:50:56:c0:00:01
>>>>> inet addr:192.168.234.1 Bcast:192.168.234.255
>>>>> Mask:255.255.255.0
>>>>> inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:1022 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>>>>>
>>>>> vmnet8 Link encap:Ethernet HWaddr 00:50:56:c0:00:08
>>>>> inet addr:172.16.132.1 Bcast:172.16.132.255
>>>>> Mask:255.255.255.0
>>>>> inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:1021 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>>>>>
>>>>> wlan0 Link encap:Ethernet HWaddr 00:23:15:92:c2:14
>>>>> inet addr:192.168.1.101 Bcast:192.168.1.255
>>>>> Mask:255.255.255.0
>>>>> inet6 addr: fe80::223:15ff:fe92:c214/64 Scope:Link
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> RX packets:11229 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:10149 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:9011967 (9.0 MB) TX bytes:1523202 (1.5 MB)
>>>>>
>>>>> shelelia at halo:~/pq$
>>> --
>>>
>>
>>
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>
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