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Orcrist
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I have been facing an unusual problem with my VirtualBox NAT settings. I have scoured the Unix SE Forums but was not ableunable to find a similar issue reported. I did find one but it was from 2009 and related to Corporate Proxy.

I have been facing an unusual problem with my VirtualBox NAT settings. I have scoured the Unix SE Forums but was not able to find a similar issue reported. I did find one but it was from 2009 and related to Corporate Proxy.

I have been facing an unusual problem with my VirtualBox NAT settings. I have scoured the Unix SE Forums but was unable to find a similar issue reported. I did find one but it was from 2009 and related to Corporate Proxy.

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Orcrist
Orcrist
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VirtualBox NAT Issue - Able to Ping and Lookup. Unable to Browse

I have been facing an unusual problem with my VirtualBox NAT settings. I have scoured the Unix SE Forums but was not able to find a similar issue reported. I did find one but it was from 2009 and related to Corporate Proxy.

Details :

  • Windows 7 Host running VirtualBox 5.1.0
  • Multiple Guest OS - Ubuntu, Fedora, CentOS (All Fresh Installations)
  • Home Network, No Perimeter Firewall
  • Using NAT (Intel PRO/1000 MT Desktop Adapter)
  • From the Guest I am able to Ping external FQDDNs. Which means DNS and Ping is working

Issue : Unable to Browse any Website

Sometime ago I had played a little with the 'VBoxManage modifyvm' settings in order to solve a Bridging related issue. I think I may have messed up something which is causing my new issue.

I have tried to re-install VirtualBox but it looks like the previous settings are getting saved somewhere which I am unable to remove and unable to 'Reset to Default' the VBox settings.

Troubleshooting Done :

Changed Adapter to PCnet Fast3 Tried Changing IPs, DNS

IP : 192.168.10.15 Default Gateway: 192.168.10.2 DNS: 192.168.10.3

tcpdump Captures :

While Pinging to Yahoo.com (Getting Replies) :

root@localhost anish]# tcpdump -i enp0s3
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on enp0s3, link-type EN10MB (Ethernet), capture size 65535 bytes
19:28:20.650985 IP 192.168.10.15.45804 > 192.168.10.3.domain: 1534+ A? yahoo.com. (27)
19:28:20.653043 IP 192.168.10.15.35280 > 192.168.10.3.domain: 47054+ PTR? 3.10.168.192.in-addr.arpa. (43)
19:28:20.661250 IP 192.168.10.3.domain > 192.168.10.15.45804: 1534 3/0/0 A 98.138.253.109, A 98.139.183.24, A 206.190.36.45 (75)
19:28:20.661833 IP 192.168.10.15 > ir1.fp.vip.ne1.yahoo.com: ICMP echo request, id 3431, seq 1, length 64
19:28:20.942937 IP ir1.fp.vip.ne1.yahoo.com > 192.168.10.15: ICMP echo reply, id 3431, seq 1, length 64

When trying to Browse through Firefox (Gateway sends Net Unreachable ICMP) :

19:29:31.562448 IP 192.168.10.15.38893 > 192.168.10.3.domain: 32749+ A? www.google.com. (32)
19:29:31.562562 IP 192.168.10.15.38893 > 192.168.10.3.domain: 48885+ AAAA? www.google.com. (32)
19:29:31.670159 IP 192.168.10.15.52571 > 192.168.10.3.domain: 60173+ A? www.google.com. (32)
19:29:31.670261 IP 192.168.10.15.52571 > 192.168.10.3.domain: 14907+ AAAA? www.google.com. (32)
19:29:35.937594 IP 192.168.10.3.domain > 192.168.10.15.55703: 53252 NXDomain 0/0/0 (43)
19:29:35.937995 IP 192.168.10.3.domain > 192.168.10.15.38893: 32749 1/0/0 A 216.58.196.196 (48)
19:29:35.938025 IP 192.168.10.3.domain > 192.168.10.15.38893: 48885 NotImp 0/0/0 (32)
19:29:35.938371 IP 192.168.10.3.domain > 192.168.10.15.52571: 60173 1/0/0 A 216.58.196.196 (48)
19:29:35.938408 IP 192.168.10.3.domain > 192.168.10.15.52571: 14907 NotImp 0/0/0 (32)
19:29:35.938865 IP 192.168.10.15.33663 > 192.168.10.3.domain: 46127+ PTR? 15.10.168.192.in-addr.arpa. (44)
19:29:35.940003 IP 192.168.10.15.46468 > kul06s14-in-f4.1e100.net.http: Flags [S], seq 4014962253, win 14600, options [mss 1460,sackOK,TS val 1649927 ecr 0,nop,wscale 7], length 0
19:29:35.941228 IP 192.168.10.2 > 192.168.10.15: ICMP net kul06s14-in-f4.1e100.net unreachable, length 36
19:29:35.941377 IP 192.168.10.15.46469 > kul06s14-in-f4.1e100.net.http: Flags [S], seq 613107971, win 14600, options [mss 1460,sackOK,TS val 1649928 ecr 0,nop,wscale 7], length 0
19:29:35.941857 IP 192.168.10.15.46470 > kul06s14-in-f4.1e100.net.http: Flags [S], seq 717756838, win 14600, options [mss 1460,sackOK,TS val 1649929 ecr 0,nop,wscale 7], length 0
19:29:35.942613 IP 192.168.10.2 > 192.168.10.15: ICMP net kul06s14-in-f4.1e100.net unreachable, length 36

Could someone please guide me in resolving this ? Alternatively, is there any way to take VBox to a 'Default Settings' state ?

Any help would be greatly appreciated, as I have been only troubleshooting VBox related issues since the past couple of days rather than doing any actual work on my Guest VM's.