<blockquote>

<p>By a <strong>large</strong> network, I mean this -</p>

</blockquote>

<p>On visceral observation, the problem statement looks quite tractable and practical. But like all problems in Computer Networks, this one looked easy in theory, but frustrated the budding Computer Scientist in me as the solutions proposed didn't work out.</p>

<blockquote>

<p>Husky Test 1</p>

</ul>

<p>The second Husky test was done with a PPTP VPN setup which wasn't quite succesful. The reason being - ROS requires bidirectional communication between the peers, and I couldn't become a peer while I was the VPN server. It caused a slew of other pesky problems like <code>REQ TIMEOUTS</code>, Disconnected ROS Nodes, disabling Internet on the VPN server, etc. But as a start, it was assuring that the problem could be solved. I realized that the learning curve for working with computers at the scale of the Internet is no child's play. But there was another takeaway with the second Husky test. Andrea (from the Husky team) could work with my remote node as the ROS master and still get the Husky up and running. This means that all the Husky traffic and node maintenance could be relegated through my PC and transferred to the Husky. <em>Much assuring.</em></p>

<p>Armed with the Computer Networks concepts I learnt at my college, I set on to set up the slightly tougher OpenVPN server. This is a snapshot of the OpenVPN access server that I set up -</p>

<p>I was not only able to set up a world-wide VPN, but also able to set up communication among the peers. But the firewalls on the Husky computer network were strong for it and sent Andrea's laptop in a continous <em>Trying to Reconnect</em> loop. There went our hopes with OpenVPN. I am still looking into this issue. The main issue was that the UDP channel of OpenVPN was accessible in the Husky network but not the TCP channels. This caused intermittent connection losses and the OpenVPN client couldn't figure out what to do. There must be a solution to this and I'll find it.</p>

<p>Throughout this experience, I learnt a lot of new things about practical Computer Networks. Once I'm able to crack the VPN problem, I could put it to use in diverse scenarios (remote robotics testing, as a road warrior, Internet of Things applications, creating a network of friends, etc. ). VPN brings everyone on the same page (or logical subnet). I also did quite a bit of work with the Stereo Video Streaming which would be the theme of my next post. Stay tuned.</p>

&lt;p&gt;&lt;em&gt;Ciao!&lt;/em&gt;&lt;/p&gt;</summary><category term="GSoC"></category><category term="Python"></category><category term="PSF"></category><category term="computers"></category><category term="science"></category><category term="exploration"></category><category term="space"></category><category term="mars"></category><category term="IMS"></category><category term="Italian Mars Society"></category></entry><entry><title>Mid-term Report - GSoC '15</title><link href="http://siddhantsci.org/blog/2015/07/01/mid-term-report-gsoc-15/" rel="alternate"></link><updated>2015-07-01T19:53:52+00:00</updated><author><name>Siddhant Shrivastava</name></author><id>tag:siddhantsci.org,2015-07-01:blog/2015/07/01/mid-term-report-gsoc-15/</id><summary type="html">&lt;p&gt;Hi all! I made it through the first half of the &lt;a href="http://siddhantsci.org/category/gsoc.html"&gt;GSoC 2015 program&lt;/a&gt;. This is the &lt;strong&gt;evaluation week&lt;/strong&gt; of the &lt;a href="http://www.google-melange.com/gsoc/homepage/google/gsoc2015"&gt;Google Summer of Code 2015 program&lt;/a&gt; with the &lt;a href="https://www.python.org/psf/"&gt;Python Software Foundation&lt;/a&gt; and the &lt;a href="http://erasproject.org/"&gt;Italian Mars Society ERAS Project&lt;/a&gt;. Mentors and students evaluate the journey so far in the program by answering some questions about their students and mentors respectively. On comparing with the timeline, I reckoned that I am on track with the project so far.&lt;/p&gt;

<p>By a <strong>large</strong> network, I mean this -</p>

<p>On visceral observation, the problem statement looks quite tractable and practical. But like all problems in Computer Networks, this one looked easy in theory, but frustrated the budding Computer Scientist in me as the solutions proposed didn't work out.</p>

<p>Husky Test 1</p>

<p>The second Husky test was done with a PPTP VPN setup which wasn't quite succesful. The reason being - ROS requires bidirectional communication between the peers, and I couldn't become a peer while I was the VPN server. It caused a slew of other pesky problems like <code>REQ TIMEOUTS</code>, Disconnected ROS Nodes, disabling Internet on the VPN server, etc. But as a start, it was assuring that the problem could be solved. I realized that the learning curve for working with computers at the scale of the Internet is no child's play. But there was another takeaway with the second Husky test. Andrea (from the Husky team) could work with my remote node as the ROS master and still get the Husky up and running. This means that all the Husky traffic and node maintenance could be relegated through my PC and transferred to the Husky. <em>Much assuring.</em></p>

<p>Armed with the Computer Networks concepts I learnt at my college, I set on to set up the slightly tougher OpenVPN server. This is a snapshot of the OpenVPN access server that I set up -</p>

<p>I was not only able to set up a world-wide VPN, but also able to set up communication among the peers. But the firewalls on the Husky computer network were strong for it and sent Andrea's laptop in a continous <em>Trying to Reconnect</em> loop. There went our hopes with OpenVPN. I am still looking into this issue. The main issue was that the UDP channel of OpenVPN was accessible in the Husky network but not the TCP channels. This caused intermittent connection losses and the OpenVPN client couldn't figure out what to do. There must be a solution to this and I'll find it.</p>

<p>Throughout this experience, I learnt a lot of new things about practical Computer Networks. Once I'm able to crack the VPN problem, I could put it to use in diverse scenarios (remote robotics testing, as a road warrior, Internet of Things applications, creating a network of friends, etc. ). VPN brings everyone on the same page (or logical subnet). I also did quite a bit of work with the Stereo Video Streaming which would be the theme of my next post. Stay tuned.</p>

<p><em>Ciao!</em></p></div>

&lt;blockquote&gt;

&lt;p&gt;By a &lt;strong&gt;large&lt;/strong&gt; network, I mean this -&lt;/p&gt;

&lt;/blockquote&gt;

&lt;p&gt;On visceral observation, the problem statement looks quite tractable and practical. But like all problems in Computer Networks, this one looked easy in theory, but frustrated the budding Computer Scientist in me as the solutions proposed didn't work out.&lt;/p&gt;

&lt;blockquote&gt;

&lt;p&gt;Husky Test 1&lt;/p&gt;

&lt;/ul&gt;

&lt;p&gt;The second Husky test was done with a PPTP VPN setup which wasn't quite succesful. The reason being - ROS requires bidirectional communication between the peers, and I couldn't become a peer while I was the VPN server. It caused a slew of other pesky problems like &lt;code&gt;REQ TIMEOUTS&lt;/code&gt;, Disconnected ROS Nodes, disabling Internet on the VPN server, etc. But as a start, it was assuring that the problem could be solved. I realized that the learning curve for working with computers at the scale of the Internet is no child's play. But there was another takeaway with the second Husky test. Andrea (from the Husky team) could work with my remote node as the ROS master and still get the Husky up and running. This means that all the Husky traffic and node maintenance could be relegated through my PC and transferred to the Husky. &lt;em&gt;Much assuring.&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;Armed with the Computer Networks concepts I learnt at my college, I set on to set up the slightly tougher OpenVPN server. This is a snapshot of the OpenVPN access server that I set up -&lt;/p&gt;

&lt;p&gt;I was not only able to set up a world-wide VPN, but also able to set up communication among the peers. But the firewalls on the Husky computer network were strong for it and sent Andrea's laptop in a continous &lt;em&gt;Trying to Reconnect&lt;/em&gt; loop. There went our hopes with OpenVPN. I am still looking into this issue. The main issue was that the UDP channel of OpenVPN was accessible in the Husky network but not the TCP channels. This caused intermittent connection losses and the OpenVPN client couldn't figure out what to do. There must be a solution to this and I'll find it.&lt;/p&gt;

&lt;p&gt;Throughout this experience, I learnt a lot of new things about practical Computer Networks. Once I'm able to crack the VPN problem, I could put it to use in diverse scenarios (remote robotics testing, as a road warrior, Internet of Things applications, creating a network of friends, etc. ). VPN brings everyone on the same page (or logical subnet). I also did quite a bit of work with the Stereo Video Streaming which would be the theme of my next post. Stay tuned.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Ciao!&lt;/em&gt;&lt;/p&gt;</summary><category term="GSoC"></category><category term="Python"></category><category term="PSF"></category><category term="computers"></category><category term="science"></category><category term="exploration"></category><category term="space"></category><category term="mars"></category><category term="IMS"></category><category term="Italian Mars Society"></category></entry><entry><title>Mid-term Report - GSoC '15</title><link href="http://siddhantsci.org/blog/2015/07/01/mid-term-report-gsoc-15/" rel="alternate"></link><updated>2015-07-01T19:53:52+00:00</updated><author><name>Siddhant Shrivastava</name></author><id>tag:siddhantsci.org,2015-07-01:blog/2015/07/01/mid-term-report-gsoc-15/</id><summary type="html">&lt;p&gt;Hi all! I made it through the first half of the &lt;a href="http://siddhantsci.org/category/gsoc.html"&gt;GSoC 2015 program&lt;/a&gt;. This is the &lt;strong&gt;evaluation week&lt;/strong&gt; of the &lt;a href="http://www.google-melange.com/gsoc/homepage/google/gsoc2015"&gt;Google Summer of Code 2015 program&lt;/a&gt; with the &lt;a href="https://www.python.org/psf/"&gt;Python Software Foundation&lt;/a&gt; and the &lt;a href="http://erasproject.org/"&gt;Italian Mars Society ERAS Project&lt;/a&gt;. Mentors and students evaluate the journey so far in the program by answering some questions about their students and mentors respectively. On comparing with the timeline, I reckoned that I am on track with the project so far.&lt;/p&gt;

&lt;blockquote&gt;

&lt;p&gt;By a &lt;strong&gt;large&lt;/strong&gt; network, I mean this -&lt;/p&gt;

&lt;/blockquote&gt;

&lt;p&gt;On visceral observation, the problem statement looks quite tractable and practical. But like all problems in Computer Networks, this one looked easy in theory, but frustrated the budding Computer Scientist in me as the solutions proposed didn't work out.&lt;/p&gt;

&lt;blockquote&gt;

&lt;p&gt;Husky Test 1&lt;/p&gt;

&lt;/ul&gt;

&lt;p&gt;The second Husky test was done with a PPTP VPN setup which wasn't quite succesful. The reason being - ROS requires bidirectional communication between the peers, and I couldn't become a peer while I was the VPN server. It caused a slew of other pesky problems like &lt;code&gt;REQ TIMEOUTS&lt;/code&gt;, Disconnected ROS Nodes, disabling Internet on the VPN server, etc. But as a start, it was assuring that the problem could be solved. I realized that the learning curve for working with computers at the scale of the Internet is no child's play. But there was another takeaway with the second Husky test. Andrea (from the Husky team) could work with my remote node as the ROS master and still get the Husky up and running. This means that all the Husky traffic and node maintenance could be relegated through my PC and transferred to the Husky. &lt;em&gt;Much assuring.&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;Armed with the Computer Networks concepts I learnt at my college, I set on to set up the slightly tougher OpenVPN server. This is a snapshot of the OpenVPN access server that I set up -&lt;/p&gt;

&lt;p&gt;I was not only able to set up a world-wide VPN, but also able to set up communication among the peers. But the firewalls on the Husky computer network were strong for it and sent Andrea's laptop in a continous &lt;em&gt;Trying to Reconnect&lt;/em&gt; loop. There went our hopes with OpenVPN. I am still looking into this issue. The main issue was that the UDP channel of OpenVPN was accessible in the Husky network but not the TCP channels. This caused intermittent connection losses and the OpenVPN client couldn't figure out what to do. There must be a solution to this and I'll find it.&lt;/p&gt;

&lt;p&gt;Throughout this experience, I learnt a lot of new things about practical Computer Networks. Once I'm able to crack the VPN problem, I could put it to use in diverse scenarios (remote robotics testing, as a road warrior, Internet of Things applications, creating a network of friends, etc. ). VPN brings everyone on the same page (or logical subnet). I also did quite a bit of work with the Stereo Video Streaming which would be the theme of my next post. Stay tuned.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;Ciao!&lt;/em&gt;&lt;/p&gt;</summary><category term="GSoC"></category><category term="Python"></category><category term="PSF"></category><category term="computers"></category><category term="science"></category><category term="exploration"></category><category term="space"></category><category term="mars"></category><category term="IMS"></category><category term="Italian Mars Society"></category></entry><entry><title>Mid-term Report - GSoC '15</title><link href="http://siddhantsci.org/blog/2015/07/01/mid-term-report-gsoc-15/" rel="alternate"></link><updated>2015-07-01T19:53:52+00:00</updated><author><name>Siddhant Shrivastava</name></author><id>tag:siddhantsci.org,2015-07-01:blog/2015/07/01/mid-term-report-gsoc-15/</id><summary type="html">&lt;p&gt;Hi all! I made it through the first half of the &lt;a href="http://siddhantsci.org/category/gsoc.html"&gt;GSoC 2015 program&lt;/a&gt;. This is the &lt;strong&gt;evaluation week&lt;/strong&gt; of the &lt;a href="http://www.google-melange.com/gsoc/homepage/google/gsoc2015"&gt;Google Summer of Code 2015 program&lt;/a&gt; with the &lt;a href="https://www.python.org/psf/"&gt;Python Software Foundation&lt;/a&gt; and the &lt;a href="http://erasproject.org/"&gt;Italian Mars Society ERAS Project&lt;/a&gt;. Mentors and students evaluate the journey so far in the program by answering some questions about their students and mentors respectively. On comparing with the timeline, I reckoned that I am on track with the project so far.&lt;/p&gt;