<div>
FOR /L %%a IN (1, 1, 254) DO (PING -n 1 -w 60 192.168.1.%%a | findstr /i &quot;Reply&quot; &gt;&nbsp;nul | findstr /v /L /G:IPs.txt &amp;&amp;&nbsp;echo 192.168.1.%%a) &gt;&gt;&nbsp;IPs.txt<br />
<br />
This echoes the addresses successful ping'd, and not already contained in IPs.txt<br />

</div>


<div>
Thanks. &nbsp;When I start it without an initial txt file, or an empty text file, I get:<br />
<br />
FINDSTR: No search strings<br />
<br />
It's repeated for each IP and leaves me with a blank file (or no file). If I enter a single IP address, it runs without error but still only leaves me the one IP I manually entered. &nbsp;Is it possible to have it create or fill the file if needed? &nbsp;I guess a last resort is to check for the existence and if it's populated before running the command.
</div>


<div>
Sorry.<br />
<br />
<br />
<br />

<pre><code class="code-1 nolinks" id="code-123859"><span>if not exist IPs.txt copy nul IPs.txt</span>
<span> </span>
<span>FOR /L %%a IN (1, 1, 254) DO (</span>
<span>  PING -n 1 -w 60 192.168.1.%%a |^</span>
<span>  findstr /i &quot;Reply&quot; | findstr /v /L /G:IPs.txt &gt; nul &amp;&amp;^</span>
<span>  echo 192.168.1.%%a</span>
<span>) &gt;&gt; IPs.txt</span>
</code></pre>
</div>


<div>
One method is a two step procedure.<br />
<br />
First, create the file WITH the Reply from... information, then run ANOTHER for command to ONLY take the 3 column of information - <br />
<br />
For example:<br />
Line 1: Ping the addresses and note only the results<br />
Line 2: Process the results and ONLY take the IP addresses.<br />
<br />
(I didn't see this question until AFTER I replied to your other question).<br />
<br />

<pre><code class="code-1 nolinks" id="code-123904"><span>FOR /L %%a IN (1, 1, 254) DO PING -n 1 -w 60 192.168.1.%%a | find /i &quot;Reply&quot; &gt;&gt; IPs.txt</span>
<span>FOR /F &quot;tokens=3 delims=: &quot; %%a IN (IPs.txt) DO Echo %%a &gt;&gt; IPsOnly.txt</span>
</code></pre>
</div>


<div>
Qlemo: I get a &quot;FINDSTR: Cannot read strings from IP.txt&quot; message returned to the command window after every invalid IP and a &quot;FINDSTR: Write Error&quot; when it comes across a valid IP. &nbsp;Nothing is saved to the .txt file. &nbsp;Also, when I tried putting the command on multiple lines, it wouldn't run at all. &nbsp;The message is FINDSTR is not recognized... but it runs without that error if I keep it all on one line.<br />
<br />
Leew: I'd rather keep it in a single file if possible. &nbsp;Run two commands is fine though. &nbsp;Is that the only way you can think to do it?<br />
<br />
We're close. &nbsp;Thanks.
</div>


<div>
Temp files are used all the time.... not sure why you are reluctant - you can always use a command to delete the temp file... for example below.<br />
<br />
This also gives you the ability to add to the file later and, optionally, use the sort command to sort the address list (though it would sort 192.168.1.1 then 192.168.1.10 before .2<br />
<br />

<pre><code class="code-1 nolinks" id="code-123934"><span>FOR /L %%a IN (1, 1, 254) DO PING -n 1 -w 60 192.168.1.%%a | find /i &quot;Reply&quot;&gt;&gt;tempips.txt</span>
<span>FOR /F &quot;tokens=3 delims=: &quot; %%a IN (tempips.txt) DO Echo %%a &gt;&gt; IPs.txt</span>
<span>DEL tempips.txt</span>
</code></pre>
</div>


<div>
The more files created just seems messy. &nbsp;If it can be done in one file, I always prefer to keep it simple. &nbsp;I actually had it writing bare IPs before but as I tweaked, I lost the part that just gave me the bare IP and I didn't want to deep search EE again to figure it out a second time. &nbsp;I have the following REM'd out in my script and that was part of it but I grabbed that from someone else's answer here and they were trying to do something slightly different so I still had to play with it.<br />
<br />
REM for /l %%a in (1, 1, 50) do ( <br />
&nbsp; for /f &quot;tokens=2&quot; %%b in ('ping /n 1 /a %ipPrefix%.%%a 2^&gt;NUL ^| findstr /i Pinging') do (<br />
&nbsp; &nbsp; if &quot;%%b&quot;==&quot;%ipPrefix%.%%a&quot; (echo %%b could not resolve to name) else (echo %ipPrefix%.%%a is %%b)<br />
&nbsp; )
</div>


<div>
Well that worked. &nbsp;When run a second time it just appends though. &nbsp;Qlemo used /v /L /G switches on findstr to avoid that. &nbsp;Can that still be done here? &nbsp;Qlemo, do you still think you can get this done without a temp file?<br />
<br />
Thanks guys!
</div>


Scans subnet with subnet entered as a parameter.

scansubnet.bat.txt

<div>
Qlemo:<br />
<br />
What is &quot;Antwort&quot;?
</div>


<div>
@#!~!!! It has to be &quot;Reply&quot;, of course.<br />

</div>


<div>
AT: I had to add some %s but your code did run. However, I still have the problem that the IPs are appended even if they already exist in the list. Using the secondary batch file isn't logging anything and it runs much slower than when all in one file. Run time of 2:10.<br />
<br />
Q: I caught the &quot;Antwort&quot; thing, what language is that? Your code appends the last IP scanned if it is valid (Reply) to the end of the list even if it already exists but avoids the other IPs that already exist. Run time of 0:24. &nbsp;So this is working the best so far. &nbsp;It just happens that I have a valid IP as the last one scanned (see note) but if I scan one further or manually put that IP earlier in the list, it works great. &nbsp;Is there any way that can be corrected though? &nbsp;This will be run on multiple subnets so the issue would certainly come up again. IPs will come and go because of DHCP and I don't care about the sort order.<br />
<br />
(Note: Each time I test the code, I'm changing the subnet to match my current one which is actually a 10.x.x.x sub and I'm changing the range to (1, 1, 50) so I can pick up at least 3 valid IPs without having to wait forever as it scans the entire subnet.)<br />
<br />
Thanks guys!
</div>


<div>
I cannot find &nbsp;any reason why that script should append the last IP again. I tried to scan with valid last IP, and second run does not append anything, as it should.<br />

</div>


<div>
OK. Type will take longer and longer to go through since the file gets longer.<br />
<br />
set ipPrefix=192.168.1<br />
FOR /L %a IN (1,1,254) DO FINDSTR /E &quot;%ipPrefix%.%a&quot; IPS.TXT &amp;&nbsp;if errorlevel 1 FOR /f &quot;tokens=3 delims=: &quot;&nbsp;%b in ('PING -n 1 -w 60 %ipPrefix%.%a ^| FIND /i &quot;Reply from&quot;') do echo %b&gt;&gt;IPS.TXT<br />
<a href="https://filedb.experts-exchange.com/incoming/2008/07_w30/43935/scansubnet.bat.txt" target="_blank" class="file-inline" title="Ver 2. (179 bytes)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>scansubnet.bat.txt</a>
</div>


<div>
I think I figured it out. &nbsp;When testing different code that kept appending, I had to manually remove the extra IPs each time to keep testing. &nbsp;It's apparently finicky in that each IP has a single space after it and the last one a hard return. &nbsp;If I don't leave the return, the last IP repeats on the same line:<br />
<br />
192.168.1.50192.168.1.50<br />
<br />
If I have a return at the end but not the space, I get the last one repeated:<br />
192.168.1.50<br />
192.168.1.50<br />
<br />
Not critical I'll just need to remember it for t-shooting in case it comes up in the future. I'm only mentioning it here because it might help someone else fix their code some day and it will save them from losing some sleep and/or hair. &nbsp;I can imagine that would be one of those really nerve racking things.<br />
<br />
AT: I haven't gone back to try your code again yet since what I have seems to be working. I am a little curious as to the difference since you have FINDSTR /E and Q is using FINDSTR /X /L without /E? &nbsp;You've still got single % in your code and I'm positive I don't want to call another external file if it's unnecessary and I don't see the benefit at the moment. &nbsp;Running slower just nails it. &nbsp;Q seems to have it working in one line which is what I was after but I certainly appreciate your efforts.<br />
<br />

</div>


<div>
Thanks to all 3 of you. &nbsp;I'll be posting several more Qs related to the same file very shortly so keep me in your radar since you're already familiar with what I'm doing.
</div>


<div>
VORTEXADMIN:<br />
<br />
Q is using the /X to match lines exactly. Which includes the space at the end. That's why Q's code has FINDSTR with /c:&quot;%prefix%.%%a &quot;&nbsp;that tiny space after %%a is required because the<br />
<br />
ECHO &nbsp;%prefix%.%%a &gt;&gt;&nbsp;IPs.txt<br />
<br />
has a space between %%a and &gt;&gt;<br />
<br />
I was using /E (ending) to not catch finding 192.168.1.1 when IPS.TXT only has 192.168.1.10 I could have used /X would not have made any difference in this case.<br />
<br />
My echo does not have a space between %a and &gt;&gt;<br />
<br />
My example has single % because it is meant to be a 2 command line entry not in a batch file. &nbsp;The attachment has double % because it is meant to run in a batch file.<br />
<br />
set ipPrefix=192.168.1<br />
FOR /L %a IN (1,1,254) DO FINDSTR /E &quot;%ipPrefix%.%a&quot; IPS.TXT &amp;&nbsp;if errorlevel 1 FOR /f &quot;tokens=3 delims=: &quot;&nbsp;%b in ('PING -n 1 -w 60 %ipPrefix%.%a ^| FIND /i &quot;Reply from&quot;') do echo %b&gt;&gt;IPS.TXT<br />
<br />

</div>


<div>
Yep, the extra space was kind of &nbsp;&quot;easter egg&quot; for the very advanced users ;-)<br />

</div>


<div>
So is the extra space required in your code? &nbsp;Is there any benefit to doing it that way instead of avoiding the possibility of a headache down the road?
</div>


<div>
Qlemo, AmazinTech and Leew, my requirements have changed a little and I've posted some follow up questions here: <a href="https://www.experts-exchange.com/questions/23597053/Batch-file-command-to-build-list-of-valid-IPs-Follow-up-Questions.html" rel="ugc">https://www.experts-exchange.com/questions/23597053/Batch-file-command-to-build-list-of-valid-IPs-Follow-up-Questions.html</a><br />
<br />
I'd appreciate you taking a look since you're already familiar with the question. &nbsp;Thanks.
</div>


<div>
<div class="content wysiwyg-content">
I need a line of code necessary to iterate through all possible IPs on my subnet and build a list of IP addresses that respond to a ping command. &nbsp;Something along the lines of:<br />
<br />
FOR /L %%a IN (1, 1, 254) DO PING -n 1 -w 60 192.168.1.%%a | find /i &quot;Reply&quot; &gt;&gt;&nbsp;IPs.txt<br />
<br />
However I only want it to log the IP address itself, not any of the other information. &nbsp;I think I need to incorporate a<br />
findstr /i &quot;from&quot; command or something in there but don't know how to go about it and grab the text next to it. &nbsp;I would also like to know if it's possible to append future runnings of the command (&gt;&gt; IPs.txt) to the existing list but not repeat any of the IPs. &nbsp;Is it possible to check the list first then not add that IP if it's already in there? &nbsp;<br />
<br />
Thanks. <br />
<br />

</div>
</div>


I need a line of code necessary to iterate through all possible IPs on my subnet and build a list of IP addresses that respond to a ping command.  Something along the lines of:

FOR /L %%a IN (1, 1, 254) DO PING -n 1 -w 60 192.168.1.%%a | find /i "Reply" >> IPs.txt

However I only want it to log the IP address itself, not any of the other information.  I think I need to incorporate a
findstr /i "from" command or something in there but don't know how to go about it and grab the text next to it.  I would also like to know if it's possible to append future runnings of the command (>> IPs.txt) to the existing list but not repeat any of the IPs.  Is it possible to check the list first then not add that IP if it's already in there?  

Thanks. 



Batch file command to build list of valid IPs

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