Date: Tue, 23 Apr 2019 21:16:56 -0500 From: Karl Denninger <karl@denninger.net> To: freebsd-questions@freebsd.org Subject: Re: openvpn Message-ID: <a2326e8d-5d5c-6030-7d10-72dee3216f8a@denninger.net> In-Reply-To: <0A8436BD-EFB8-4A54-B920-329096B89C5B@mail.sermon-archive.info> References: <0A8436BD-EFB8-4A54-B920-329096B89C5B@mail.sermon-archive.info>
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This is a cryptographically signed message in MIME format. --------------ms030000000307090208080206 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 4/22/2019 19:53, Doug Hardie wrote: > I am trying to setup an openvpn server on my home network. Home machin= es are all running FBSD 12.0 Release. openvpn was installed as a package= =2E The results are quite confusing. Ping from an external device works= correctly to all the home machines. I can use tcpdump to see the reques= t packets arriving at the openvpn server, being sent to the recipient mac= hine, the response packets being sent from the recipient machine to the o= penvpn server, and then sent to the external device. The external device= shows that the response was received with a reasonable response time giv= en that it is a cell phone. =20 > > However, when I try to access a web page on any of the servers, I see t= he same set of packets via tcpdump. In addition if I run ktrace on the o= penvpn server, I see the encrypted packets from the client being received= =2E The decrypted packets sent to the home server. The unencrypted resp= onse from the home server, and the encrypted response sent to the phone. = However, the phone says that the server dropped the connection, or it sh= ows a blank page. > > My first thought was that there was an encryption issue, but if that we= re the case, ping would not work. Checking the ping packets shows that t= hey are encrypted between the phone and the openvpn server. Likewise a r= outing issue in the home network does not seem to be the problem for the = same reason. All the info I have found on the web about vpn indicates th= at a ping test should be sufficient. But, in this case it is not. > > Any ideas on how to track down the problem, or fix it? Thanks, > > -- Doug IMHO -- post your configuration file to the list.... I use OpenVPN with ipfw's internal NAT and it works fine, but the config file is a bit wonky and if you get it wrong you'll either have no DNS on the client or packets won't get routed.=C2=A0 Either way the connection c= omes up but it doesn't work. --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms030000000307090208080206 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DdgwggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw FwYDVQQKDBBDdWRhIFN5c3RlbXMgTExDMRgwFgYDVQQLDA9DdWRhIFN5c3RlbXMgQ0ExITAf BgNVBAMMGEN1ZGEgU3lzdGVtcyBMTEMgMjAxNyBDQTAeFw0xNzA4MTcxNjQyMTdaFw0yNzA4 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