- tor-relays - lists.torproject.org

Re: [tor-relays] Is AES-NI enabled in tor?
by Patrice 23 Dec '16

23 Dec '16

> Please don't mix multiple questions into one thread. Sorry, my bad. > Tor does not implement crypto itself (mostly) and relies on a > cryptolibrary (which is OpenSSL/LibreSSL/etc) instead. Thus you should > check if AES-NI is enabled in your cryptolibrary. > > An excerpt from StackOverflow answer [1] about it: > > $ openssl speed -elapsed -evp aes-128-cbc > > $ OPENSSL_ia32cap="~0x200000200000000" openssl speed -elapsed -evp > aes-128-cbc > > "Output of the first line should be significantly faster than the > second." If there is no AES-NI enabled in "OpenSSL" these two should > give similar results. I couldn't do that test. OpenSSL was not installed. After I installed it I could perform that test and it was positive. Here is the output: $ openssl speed -elapsed -evp aes-128-cbc You have chosen to measure elapsed time instead of user CPU time. Doing aes-128-cbc for 3s on 16 size blocks: 33370007 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 64 size blocks: 13118341 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 256 size blocks: 3915543 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 1024 size blocks: 1029134 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 8192 size blocks: 130438 aes-128-cbc's in 3.00s OpenSSL 1.0.1t 3 May 2016 built on: Fri Sep 23 17:53:23 2016 options:bn(64,64) rc4(16x,int) des(idx,cisc,16,int) aes(partial) blowfish(idx) compiler: gcc -I. -I.. -I../include -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wa,--noexecstack -Wall -DMD32_REG_T=int -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM The 'numbers' are in 1000s of bytes per second processed. type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes aes-128-cbc 177973.37k 279857.94k 334126.34k 351277.74k 356182.70k $ OPENSSL_ia32cap="~0x200000200000000" openssl speed -elapsed -evp aes-128-cbc You have chosen to measure elapsed time instead of user CPU time. Doing aes-128-cbc for 3s on 16 size blocks: 6232419 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 64 size blocks: 1776077 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 256 size blocks: 454887 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 1024 size blocks: 114409 aes-128-cbc's in 3.00s Doing aes-128-cbc for 3s on 8192 size blocks: 14327 aes-128-cbc's in 3.00s OpenSSL 1.0.1t 3 May 2016 built on: Fri Sep 23 17:53:23 2016 options:bn(64,64) rc4(16x,int) des(idx,cisc,16,int) aes(partial) blowfish(idx) compiler: gcc -I. -I.. -I../include -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -m64 -DL_ENDIAN -DTERMIO -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wa,--noexecstack -Wall -DMD32_REG_T=int -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM The 'numbers' are in 1000s of bytes per second processed. type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes aes-128-cbc 33239.57k 37889.64k 38817.02k 39051.61k 39122.26k But it is a little confusing for me because there is this line in the logs: Tor 0.2.9.8 (git-a0df013ea241b026) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1t and Zlib 1.2.8. From that I thought Tor used already OpenSSL but it wasn't installed. :S I bought this board with this CPU (incl. AES-NI support) because I thought it would give a benefit. > N.B. AES-NI is not a feature of*motherboard* - it's CPU instructions > (NI stands for "New Instructions"). I simply forgot that. ;) Cheers, Patrice

2 1

Re: [tor-relays] tor-relays Digest, Vol 71, Issue 93
by Patrice 22 Dec '16

22 Dec '16

Thank you! That was already the answer. :) > You will not see anything in logs until this value isn't good and was > adjusted by tor. For details, see compute_real_max_mem_in_queues() > function in /src/or/config.c. Cheers, Patrice

1 0

A Question about aes-ni and the use of RAM.
by Patrice 22 Dec '16

22 Dec '16

Hi, does anyone know if the aes-ni support of the motherboard is used by default? (I saw nothing in the logs.) At the beginning I thought so but than I stumbled upon this option: > HardwareAccel 1 After I edited my torrc, this line showed up in my logs: Dec 21 17:34:41.000 [notice] Default OpenSSL engine for RSA is RSAX engine support [rsax] ------------------------------- And my other question is, does tor recognize this option? > MaxMemInQueues 7000 MByte Because I see nothing in the logs. I am not 100% sure but I think tor gave a feedback when I used this option in the earlier versions. Cheers, Patrice

2 2

@Rana - with reference to: Unwarranted discrimination of relays with dynamic
by Patrice 22 Dec '16

22 Dec '16

Hi, I`ve read your post and questions, also about your 2 Raspberry PIs with the same setting but different locations. I thought about it and my question is: Did these to PIs got a new fresh identity on day zero? If not, it`s worth a try, probably. Kill the old identities and let them by. My fundamental idea is (and that`s why I am writing this): Does my behaviour with the relay (restarting, upgrading, not be onlinening) effect the measurement and therefore the throughput of my relay? Cheers, Patrice

1 0

confusing error from "tor --verify-config"
by Patrice 21 Dec '16

21 Dec '16

Hi folks, my relay is running fine [zeiberschnitzel] and it got no errors. I can`t see anything in the logs either. But when I do the command #tor --verify-config I got these outputs: Dec 20 18:20:27.946 [notice] Tor v0.2.8.11 (git-9fc59eddc17a726a) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1t and Zlib 1.2.8. Dec 20 18:20:27.947 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dec 20 18:20:27.947 [notice] Read configuration file "/etc/tor/torrc". Dec 20 18:20:27.956 [warn] /var/lib/tor is not owned by this user (root, 0) but by debian-tor (105). Perhaps you are running Tor as the wrong user? Dec 20 18:20:27.957 [warn] Failed to parse/validate config: Couldn't access/create private data directory "/var/lib/tor" Dec 20 18:20:27.957 [err] Reading config failed--see warnings above. I would say it`s nothing tragical but I am curios about it. Thanks and Cheers

4 3

Re: [tor-relays] confusing error from "tor --verify-config"
by Patrice 21 Dec '16

21 Dec '16

Hi, > My bad, shell for debian-tor is set to /bin/false and so it prevents any > command from running. Setting shell should "fix" this: > > su debian-tor -s /bin/sh -c "tor --verify-config" > > -- > Ivan Markin thank you for your hint, that solved it. :-) Now I`ve got this beautiful non error output: # su debian-tor -s /bin/sh -c "tor --verify-config" Dec 21 14:10:43.078 [notice] Tor 0.2.9.8 (git-a0df013ea241b026) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1t and Zlib 1.2.8. Dec 21 14:10:43.078 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dec 21 14:10:43.078 [notice] Read configuration file "/etc/tor/torrc". Configuration was valid Cheers, Patrice

1 0

Re: [tor-relays] confusing error from "tor --verify-config"
by Patrice 21 Dec '16

21 Dec '16

Hi, > I would suggest running tor --verify-config as debian-tor user instead of > root After I run the following command I`ve got no output. Is this correct then? I expected a few lines somehow. su -c "/etc/init.d/tor --verify-config" debian-tor > I would suggest not running tor as root .:) > As root you can do: > su debian-tor "tor --verify-config" > I am not running tor as root. Tor runs as "debian-tor". I installed it from the repositories and changed nothing in the permissions. Cheers, Patrice

3 2

Updating our IP Address
by diffusae 20 Dec '16

20 Dec '16

Hi! Yesterday I encountered a strange IP address update via DynDNS: Dec 19 23:00:32.000 [notice] Your IP address seems to have changed to 176.10.104.240 (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating. Dec 19 23:00:32.000 [notice] Our IP Address has changed from xx.xx.xx.xx to 176.10.104.240; rebuilding descriptor (source: METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Dec 19 23:00:36.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Dec 19 23:04:32.000 [notice] Your IP address seems to have changed to xx.xx.xx.xx (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating. Dec 19 23:04:32.000 [notice] Our IP Address has changed from 176.10.104.240 to xx.xx.xx.xx ; rebuilding descriptor (source: METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Dec 19 23:04:34.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Dec 19 23:08:32.000 [notice] Your IP address seems to have changed to 176.10.104.240 (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating. Dec 19 23:08:32.000 [notice] Our IP Address has changed from xx.xx.xx.xx to 176.10.104.240; rebuilding descriptor (source: METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Dec 19 23:08:34.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Dec 19 23:13:32.000 [notice] Your IP address seems to have changed to xx.xx.xx.xx (METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Updating. Dec 19 23:13:32.000 [notice] Our IP Address has changed from 176.10.104.240 to xx.xx.xx.xx; rebuilding descriptor (source: METHOD=RESOLVED HOSTNAME=my.dyndns.cc). Dec 19 23:13:36.000 [notice] Self-testing indicates your ORPort is reachable from the outside. Excellent. Dec 19 23:22:38.000 [notice] Self-testing indicates your DirPort is reachable from the outside. Excellent. Publishing server descriptor The DynDNS client updates the IP every five minutes. It looks like somebody has tried to changed / update the IP manually or via spoofed update (DNS) entry. I also recognized the change at the WebGUI of the DynDNS Provider. The changed IP address is an exit node (0111BA9B604669E636FFD5B503F382A4B7AD6E80) in Switzerland. I don't think, that this is a bug in Tor 0.2.9.7-rc. Are there any possible attacks to Tor relays, if they are using a faked IP address? Normally this shouldn't work. Even if the traffic is redirected to an exit node, but I am not sure. Well, it should be safer to use autodetection of the IP though Tor. Regards,

3 4

Report of home relay experience (cont'd)
by Rana 20 Dec '16

20 Dec '16

Of the two relays that I run from two different residential premises for some time now, the first, nicknamed ZG0 (has absolutely stable dynamic IP and Stable flag for many days now) is clinically dead despite the measured BW of 100 kbytes/sec. The second, nicknamed GG2 (static IP, Stable, Fast, HSdir) is not dead but is relaying only about 0.5 gbytes per day. That's an average rate of just 4% of its never-changing measured BW of 153 Kbytes/sec (which is equal to 100% of its bandwidth limit in torrc). It currently has 900 connections and made over 16,000 circuit handshakes in the last 6 hours, all of them successful. The two relays run on identical Pies with the same configuration except the bandwidth limit (which is higher on ZG0 than on GG2) and negligible CPU and memory utilization. Comments? Rana

3 3

confusing error from "tor --verify-config"
by Patrice 20 Dec '16

20 Dec '16

Hi folks, my relay is running fine [zeiberschnitzel] and it got no errors. I can`t see anything in the logs either. But when I do the command #tor --verify-config I got these outputs: Dec 20 18:20:27.946 [notice] Tor v0.2.8.11 (git-9fc59eddc17a726a) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1t and Zlib 1.2.8. Dec 20 18:20:27.947 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dec 20 18:20:27.947 [notice] Read configuration file "/etc/tor/torrc". Dec 20 18:20:27.956 [warn] /var/lib/tor is not owned by this user (root, 0) but by debian-tor (105). Perhaps you are running Tor as the wrong user? Dec 20 18:20:27.957 [warn] Failed to parse/validate config: Couldn't access/create private data directory "/var/lib/tor" Dec 20 18:20:27.957 [err] Reading config failed--see warnings above. I would say it`s nothing tragical but I am curios about it. Thanks and Cheers

1 0