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<p>Hello ,</p>
<p><span style="font-size: 9pt;">We have configured splitDNS .Bind version is 9.9.2.We are able to lookup and browse to particular URL( e.g.</span><a href="https://registry.npmjs.org/">https://registry.npmjs.org</a><span style="font-size: 9pt;">) from internal network but the same URL when we tried from external network ,it failed to browse ,but able to do nslookup.We checked tcpdump logs and observed that DNS protocol switched from udp to tcp.</span></p>
<p><span style="font-size: 9pt;">Tcpdump logs for reference</span></p>
<p><span style="font-size: 9pt;">17:39:28.380918 ARP, Request who-has 196.1.113.242 tell 196.1.113.248, length 28</span></p>
<p>17:39:28.381205 ARP, Reply 196.1.113.242 is-at 00:09:0f:09:00:1a, length 46</p>
<p>17:39:30.395995 IP 196.1.113.242.54930 > 196.1.113.248.domain: Flags [S], seq 2177054283, win 14600, options [mss 1460,sackOK,TS val 2512104 ecr 0,nop,wscale 7], length 0</p>
<p>17:39:38.420575 IP 196.1.113.242.54930 > 196.1.113.248.domain: Flags [S], seq 2177054283, win 14600, options [mss 1460,sackOK,TS val 2520128 ecr 0,nop,wscale 7], length 0</p>
<p>17:39:54.451991 IP 196.1.113.242.54930 > 196.1.113.248.domain: Flags [S], seq 2177054283, win 14600, options [mss 1460,sackOK,TS val 2536160 ecr 0,nop,wscale 7], length 0</p>
<p>17:40:26.483591 IP 196.1.113.242.54930 > 196.1.113.248.domain: Flags [S], seq 2177054283, win 14600, options [mss 1460,sackOK,TS val 2568192 ecr 0,nop,wscale 7], length 0<span style="font-size: 9pt;"> </span></p>
<p>Kindly help to resolve the same.</p>
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Regards,
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Purva Rawan
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