Re: [tor-relays] [tor-talk] obfsproxy failure: obfs3

I'm still having trouble connecting to my obfsproxy bridge; Any pointers would be appreciated. External scanning indicates that the correct ports are open except for port 443 but it's definitely open on the firewall.

lee@li388-156:~$ nmap -p 22,443,9001,40872,52176 173.255.119.202

Starting Nmap 5.21 ( http://nmap.org ) at 2013-08-21 16:44 EDT
Nmap scan report for 202.119.255.173.bc.googleusercontent.com (173.255.119.202)
Host is up (0.16s latency).
PORT      STATE  SERVICE
22/tcp    open   ssh
443/tcp   closed https
9001/tcp  open   tor-orport
40872/tcp open   unknown
52176/tcp open   unknown

lee@li388-156:~$ openssl s_client -showcerts -connect 173.255.119.202:443
connect: Connection refused
connect:errno=111

maybe this?Âhttps://trac.torproject.org/projects/tor/ticket/5104

Confirming that 443 is accessible:

lee@tor-bootstrap:~$ sudo python -m SimpleHTTPServer 443

Serving HTTP on 0.0.0.0 port 443 ...
106.187.45.156 - - [21/Aug/2013 22:39:16] code 400, message Bad request syntax ('\x16\x03\x01\x00\xdc\x01\x00\x00\xd8\x03\x02R\x15A\x94\xc5\xfc\xc1(\x04O\xe0\xee@\x92d\x17.\xd9N\xa1Q\xb3$_\xa6H\xc6adp\xa11\x00\x00f\xc0\x14\xc0')
106.187.45.156 - - [21/Aug/2013 22:39:16] "ïïRAïïïï(Oïï@ïd.ïNïQï$_ïHïadpï1fïï" 400 -
lee@li388-156:~$ openssl s_client -showcerts -connect 173.255.119.202:443
CONNECTED(00000003)
140181545842336:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:749:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 225 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
---

On Thu, Aug 15, 2013 at 10:14 AM, lee colleton <lee@xxxxxxxxxxxx> wrote:

-tor-relay
+tor-relays
On Thu, Aug 15, 2013 at 10:13 AM, lee colleton <lee@xxxxxxxxxxxx> wrote:
All of the ports respond on the external IP except for 443 but I can connect via SSL on 9001. I don't understand howÂORListenAddress is supposed to work: my bridge times out on 443 but when I comment out theÂORListenAddress line it doesn't connect via obfsproxy at all.

Please advise.
On Thu, Aug 15, 2013 at 1:47 AM, lee colleton <lee@xxxxxxxxxxxx> wrote:
With the ORListenAddress line uncommented, a slightly different failure results:

Orbot is startingâ
Orbot is startingâ
got tor proc id: 28490
Tor process id=28490

Connecting to control port: 9051
SUCCESS connected to control port
SUCCESS authenticated to control port
Starting Tor clientâ complete.
adding control port event handler
SUCCESS added control port event handler
Starting privoxy process
/data/data/org.torproject.android/app_bin/privoxy /data/data/org.torproject.android/app_bin/privoxy.config &
NOTICE: Heartbeat: Tor's uptime is 0:00 hours, with 0 circuits open. I've sent 0 kB and received 0 kB.
Privoxy is running on port:8118
Privoxy process id=28508

Network connectivity is good. Waking Tor up...
Circuit (1) LAUNCHED:
NOTICE: Bootstrapped 5%: Connecting to directory server.
orConnStatus (173.255.119.202:443): LAUNCHED
NOTICE: Bootstrapped 10%: Finishing handshake with directory server.
Circuit (1) FAILED: ONEHOP_TUNNEL > IS_INTERNAL > NEED_CAPACITY
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 80) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 80) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 80) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Tried for 120 seconds to get a connection to [scrubbed]:443. Giving up. (waiting for circuit)
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
On Aug 15, 2013 1:41 AM, "lee colleton" <lee@xxxxxxxxxxxx> wrote:
When I attempt to connect to this bridge, I see a failure in handshaking:

Orbot is startingâ
Orbot is startingâ
got tor proc id: 27365
Tor process id=27365
Connecting to control port: 9051
SUCCESS connected to control port
SUCCESS authenticated to control port
Starting Tor clientâ complete.
adding control port event handler
SUCCESS added control port event handler
Starting privoxy process
/data/data/org.torproject.android/app_bin/privoxy /data/data/org.torproject.android/app_bin/privoxy.config &
NOTICE: Heartbeat: Tor's uptime is 0:00 hours, with 0 circuits open. I've sent 0 kB and received 0 kB.
Privoxy is running on port:8118
Privoxy process id=27393
Network connectivity is good. Waking Tor up...
Circuit (1) LAUNCHED:
NOTICE: Bootstrapped 5%: Connecting to directory server.
orConnStatus (173.255.119.202:443): LAUNCHED
NOTICE: Bootstrapped 10%: Finishing handshake with directory server.
NOTICE: We weren't able to find support for all of the TLS ciphersuites that we wanted to advertise. This won't hurt security, but it might make your Tor (if run as a client) more easy for censors to block.
NOTICE: To correct this, use a more recent OpenSSL, built without disabling any secure ciphers or features.
Circuit (1) FAILED: ONEHOP_TUNNEL > IS_INTERNAL > NEED_CAPACITY
orConnStatus (173.255.119.202:443): FAILED
WARN: Problem bootstrapping. Stuck at 10%: Finishing handshake with directory server. (DONE; DONE; count 1; recommendation warn)
WARN: 1 connections have failed:
WARN:Â 1 connections died in state handshaking (TLS) with SSL state SSLv2/v3 read server hello A in HANDSHAKE
NOTICE: Your application (using socks4a to port 80) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 443) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
NOTICE: Your application (using socks4a to port 80) instructed Tor to take care of the DNS resolution itself if necessary. This is good.
On Aug 15, 2013 12:31 AM, "lee colleton" <lee@xxxxxxxxxxxx> wrote:
When I comment out the ORListenAddress line things look OK.
# Listen on a port other than the one advertised in ORPort (that is,
# advertise 443 but bind to 9001).
#ORListenAddress 0.0.0.0:9001
Aug 15 06:52:50.000 [notice] Tor 0.2.4.16-rc (git-dcf6b6d7dda9ffbd) opening log file.
Aug 15 06:52:50.000 [notice] We were built to run on a 64-bit CPU, with OpenSSL 1.0.1 or later, but with a version of OpenSSL that apparently lacks accelerated support for the NIST P-224 and P-256 groups. Building openssl with such support (using the enable-ec_nistp_64_gcc_128 option when configuring it) would make ECDH much faster.
Aug 15 06:52:50.000 [notice] Your Tor server's identity key fingerprint is 'gcedemo 08C752E8E86EB5916574A8625030B0EC204EABB8'
Aug 15 06:52:50.000 [notice] Configured hibernation.  This interval began at 2013-08-15 00:00:00; the scheduled wake-up time was 2013-08-15 00:00:00; we expect to exhaust our quota for this interval around 2013-08-16 00:00:00; the next interval begins at 2013-08-16 00:00:00 (all times local)
Aug 15 06:52:50.000 [notice] Parsing GEOIP IPv4 file /usr/share/tor/geoip.
Aug 15 06:52:50.000 [notice] Parsing GEOIP IPv6 file /usr/share/tor/geoip6.
Aug 15 06:52:50.000 [notice] Configured to measure statistics. Look for the *-stats files that will first be written to the data directory in 24 hours from now.
Aug 15 06:52:51.000 [notice] We now have enough directory information to build circuits.
Aug 15 06:52:51.000 [notice] Bootstrapped 80%: Connecting to the Tor network.
Aug 15 06:52:52.000 [notice] Bootstrapped 85%: Finishing handshake with first hop.
Aug 15 06:52:53.000 [notice] Guessed our IP address as 173.255.119.202 (source: 38.229.70.33).
Aug 15 06:52:53.000 [notice] Bootstrapped 90%: Establishing a Tor circuit.
Aug 15 06:52:53.000 [notice] Registered server transport 'obfs3' at '0.0.0.0:40872'
Aug 15 06:52:53.000 [notice] Registered server transport 'obfs2' at '0.0.0.0:52176'
Aug 15 06:52:55.000 [notice] Tor has successfully opened a circuit. Looks like client functionality is working.
Aug 15 06:52:55.000 [notice] Bootstrapped 100%: Done.
Aug 15 06:52:55.000 [notice] Now checking whether ORPort 173.255.119.202:443 is reachable... (this may take up to 20 minutes -- look for log messages indicating success)
Aug 15 06:53:04.000 [notice] New control connection opened.
Aug 15 07:10:11.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Publishing server descriptor.
On Wed, Aug 14, 2013 at 9:53 PM, lee colleton <lee@xxxxxxxxxxxx> wrote:
Yes, I've opened the ports in the Google Compute Engine (see below). I'll follow up on their forum to make sure I've altered the firewall properly.

--lee
lee@li388-156:~$ gcutil --service_version="v1beta15" --project="colleton.net:tor-cloud" listfirewalls
+------------------------+---------------------------------------+---------+------------+-------------+-------------+
|          name          |              description              | network | source-ips | source-tags | target-tags |
+------------------------+---------------------------------------+---------+------------+-------------+-------------+
| default-allow-internal | Internal traffic from default allowed | default | 10.0.0.0/8 |             |             |
| default-ssh            | SSH allowed from anywhere             | default | 0.0.0.0/0  |             |             |
| tor-obfsproxy          |                                       | default | 0.0.0.0/0  |             | obfsproxy   |
+------------------------+---------------------------------------+---------+------------+-------------+-------------+
lee@li388-156:~$ gcutil --service_version="v1beta15" --project="colleton.net:tor-cloud" getfirewall tor-obfsproxy
+---------------+-------------------------------+
|   property    |             value             |
+---------------+-------------------------------+
| name          | tor-obfsproxy                 |
| description   |                               |
| creation-time | 2013-08-07T18:37:35.986-07:00 |
| network       | default                       |
| source-ips    | 0.0.0.0/0                     |
| source-tags   |                               |
| target-tags   | obfsproxy                     |
| allowed       | tcp: 443, 9001, 40872, 52176  |
+---------------+-------------------------------+
lee@li388-156:~$ 
On Wed, Aug 14, 2013 at 9:19 PM, Roger Dingledine <arma@xxxxxxx> wrote:

On Wed, Aug 14, 2013 at 09:08:03AM -0700, lee colleton wrote:
> There's a more serious issue in that my server doesn't appear to be
> reachable. I've opened tcp:443,9001 along with the two specifiedobfsproxy
> ports
>
> Aug 14 15:26:58.000 [notice] Bootstrapped 100%: Done.
> Aug 14 15:26:58.000 [notice] Now checking whether ORPort
> 173.255.119.202:443 is reachable... (this may take up to 20 minutes --
> look for log messages indicating success)
> Aug 14 15:28:00.000 [notice] New control connection opened.
> Aug 14 15:46:56.000 [warn] Your server (173.255.119.202:443) has not
> managed to confirm that its ORPort is reachable. Please check your
> firewalls, ports, address, /etc/hosts file, etc.

Well, that's because it's unreachable. (I just tried.)

Can you try following the suggestion in the log message?

--Roger

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