<div dir="ltr"><div>Hi Osmocom team. <br></div><div>We are sorry to disturb you.</div><div>We have a question about establishing a stable internet connection
(IuPS_PS) between MS and our developed network core system using our
home nodeB (HNB). <br></div><div>We set <b>Primary DNS Address: 172.60.3.154 </b>(core IP) and <b>Secondary DNS Address: 8.8.8.8</b> in <b>Activate PDP Context Accept.</b></div><div>At this step, we can see the MS packets
in the interface between HNB and core using wireshark. The protocol is <b>GTP <DNS></b> and the stacked layers are <b>DNS / UDP / IP / GTP / UDP / IP</b> which I attached a screenshot of the wireshark log.</div><div>As you can see in the attached image, our query in the MS is <b>server.hnb</b> <b>(<a href="http://server.hnb" target="_blank">http://server.hnb</a>)</b>. In order to show our default page to the user query, we set up a DNS server and HTTP server (Apache) in 172.60.3.154 and <b>BIND9</b> is configured as the primary server for the domain<code></code> <b>server.hnb</b>. The command <b>dig @localhost server.hnb</b> outputs the following:</div><div><br></div><div>; <<>> DiG 9.16.1-Ubuntu <<>> @localhost server.hnb<br>; (1 server found)<br>;; global options: +cmd<br>;; Got answer:<br>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49532<br>;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1<br><br>;; OPT PSEUDOSECTION:<br>; EDNS: version: 0, flags:; udp: 4096<br>; COOKIE: 15821f64047895870100000060070fb921a17af91fd22f9f (good)<br>;; QUESTION SECTION:<br>;server.hnb. IN A<br><br>;; ANSWER SECTION:<br>server.hnb. 604800 IN A 172.60.3.154<br><br>;; Query time: 0 msec<br>;; SERVER: 127.0.0.1#53(127.0.0.1)<br>;; WHEN: Jan 19 20:28:33 +0330 2021<br>;; MSG SIZE rcvd: 83<br></div><div><br></div><div>and also when we query <b><a href="http://server.hnb" target="_blank">http://server.hnb</a> </b>in the browser of the core system (172.60.3.154), we see the <span><b>
Apache2 Ubuntu Default Page</b> but this default page is not shown in the MS.</span></div><div><span>Furthermore, we think that a GTP tunnel may be required and we set up a GTP tunnel using <b>libgtpnl</b> and the two following commands:</span></div><div><span><br></span></div><div><span>gtp-link add gtp1</span></div><div><span>gtp-tunnel add gtp1 v1 1 100 10.250.0.114 172.60.3.154</span></div><div><span><br></span></div><div><span>where 1 is the gTP-TEI obtained in <b>RAB-Assignment Response </b>and 100 is the similar field in <b>RAB-Assignment Request. </b>Also, 10.250.0.114 is the MS IP and 172.60.3.154 is the core IP.</span><span lang="en"><span><span> But there is no captured package in this tunnel (using wireshark).</span></span></span></div><div><br></div><div>Could you please help us to solve this problem which is mentioned in the following questions?<br></div><div>Is the above procedure performed in the correct way?<br></div><div>We want to show our default page<span lang="en"><span><span></span></span></span><span></span> in MS when the user query is<b> <a href="http://server.hnb" target="_blank">http://server.hnb</a></b>,
but we think that a GTP manager is required to split the (( DNS / UDP /
IP )) layers from (( DNS / UDP / IP / GTP / UDP / IP )) to send to DNS
server.<span lang="en"><span><span> How can it be solved, if this assumption is correct?</span></span></span></div><div><br></div><div>Thank you again for spending time with us.<font color="#888888"><br></font></div><div>Best regards,</div><div>Morteza Ali Ahmadi</div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span style="font-family:courier new,monospace"><span style="background-color:rgb(255,255,255)"><b><font size="3">When there is much light, The shadow is deep...</font></b></span></span></div></div></div>