Re: [Proftpd-user] mod_sftp vs sshd performance

Sergei Gerasenko <[email protected]>
Newsgroups gmane.network.proftpd.user
Message-ID <[email protected]> 
Hi Dieter,

Thanks for the scriptlet. I think aes128-cbc is working comparatively well. Is arcfour not available for proftpd anymore?

Thanks,
  Sergei

> On May 9, 2019, at 12:28 PM, Dieter Bloms <[email protected]> wrote:
> 
> Hello Sergei,
> 
> maybe something like this
> 
> for cipher in aes128-ctr aes192-ctr arcfour .... ;  do
>  echo "$cipher"
>  scp -c "$cipher" /tmp/bigfile.img login@server:/
> done
> 
> and find the best for your environment.
> 
> 
> On Thu, May 09, Sergei Gerasenko wrote:
> 
>> Hi Dieter,
>> 
>> Once again, great info. Unfortunately, I see that scp doesn’t support the none cipher by default — a recompile of sshd/ssh is needed :( So, I tried aes-128-cbc and I’m getting results close to those of sshd. So, that’s good! The next option besides none is something week like arcfour but it’s not enable-able in proftpd though ssh does support that. Any other weak and fast ciphers you know about?
>> 
>> Thanks again,
>>  Sergei
>> 
>> Oh, a co-worker told me you can get a free SSL cert if you’re non-profit: https://letsencrypt.org <https://letsencrypt.org/>. Will that work for forums.proftpd.org <http://forums.proftpd.org/>?
>> 
>>> On May 8, 2019, at 11:17 PM, Dieter Bloms <[email protected]> wrote:
>>> 
>>> Hello Sergei,
>>> 
>>> if security doesn't matter, you can use the NULL cipher, so encryption
>>> is disabled at all.
>>> 
>>> Have a look at http://www.proftpd.org/docs/contrib/mod_sftp.html
>>> and search for "The "none" cipher"
>>> 
>>> 
>>> On Wed, May 08, Sergei Gerasenko wrote:
>>> 
>>>> Hi Dieter,
>>>> 
>>>> Wow, that’s awesome info. As I understand though, [email protected] <mailto:[email protected]> is not yet implemented in proftpd (https://github.com/proftpd/proftpd/issues/456 <https://github.com/proftpd/proftpd/issues/456>)? If so, what’s the most efficient encryption algorithm that proftpd supports currently for sftp? This is for an internal system, so I don’t need super strong encryption. 
>>>> 
>>>> Thank you SO MUCH for this pointer!
>>>> 
>>>> Sergei
>>>> 
>>>>> On May 8, 2019, at 5:01 PM, Dieter Bloms <[email protected]> wrote:
>>>>> 
>>>>> Hi Sergei,
>>>>> 
>>>>> with proftpd you use aes128-ctr and with sshd
>>>>> [email protected], which is faster than aes128-ctr.
>>>>> 
>>>>> So please be sure you use the same ciphers for both connections.
>>>>> You can add -c aes128-ctr to scp.
>>>>> 
>>>>> On Wed, May 08, Sergei Gerasenko wrote:
>>>>> 
>>>>>> In the output of scp:
>>>>>> 
>>>>>> debug1: SSH2_MSG_KEXINIT sent
>>>>>> debug1: SSH2_MSG_KEXINIT received
>>>>>> debug1: kex: algorithm: ecdh-sha2-nistp256
>>>>>> debug1: kex: host key algorithm: ssh-rsa
>>>>>> debug1: kex: server->client cipher: aes128-ctr MAC: [email protected] compression: none
>>>>>> debug1: kex: client->server cipher: aes128-ctr MAC: [email protected] compression: none
>>>>>> debug1: kex: ecdh-sha2-nistp256 need=16 dh_need=16
>>>>>> debug1: kex: ecdh-sha2-nistp256 need=16 dh_need=16
>>>>>> debug1: sending SSH2_MSG_KEX_ECDH_INIT
>>>>>> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
>>>>>> 
>>>>>> 
>>>>>> SSHD
>>>>>> 
>>>>>> In the output of scp:
>>>>>> 
>>>>>> debug1: Authenticating to internal102.ord.clientftp.core.cnvr.net:22 as 'sgerasenko'
>>>>>> debug1: SSH2_MSG_KEXINIT sent
>>>>>> debug1: SSH2_MSG_KEXINIT received
>>>>>> debug1: kex: algorithm: curve25519-sha256
>>>>>> debug1: kex: host key algorithm: ecdsa-sha2-nistp256
>>>>>> debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
>>>>>> debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
>>>>>> debug1: kex: curve25519-sha256 need=64 dh_need=64
>>>>>> debug1: kex: curve25519-sha256 need=64 dh_need=64
>>>>>> debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
>>>>>> 
>>>>>> Thank you for responding!
>>>>>> Sergei
>>>>>> 
>>>>>> 
>>>>>>> On May 8, 2019, at 9:04 AM, Dieter Bloms <[email protected]> wrote:
>>>>>>> 
>>>>>>> Hello Sergei,
>>>>>>> 
>>>>>>> which ciphers were used, when you use sshd and proftpd ?
>>>>>>> You will see it on command line with scp/sftp -v
>>>>>>> 
>>>>>>> Be sure both connections use the same one.
>>>>>>> 
>>>>>>> 
>>>>>>> On Wed, May 08, Sergei Gerasenko wrote:
>>>>>>> 
>>>>>>>> Also, for some reason I’m having trouble enabling tracing for the sftp traffic. The sftp log is empty. I’ve put this in my main config at the very beginning:
>>>>>>>> 
>>>>>>>> # (http://www.proftpd.org/docs/howto/Tracing.html)
>>>>>>>> TraceLog                        /var/log/proftpd/sftp_trace.log
>>>>>>>> Trace scp:20 sftp:20 ssh2:20
>>>>>>>> 
>>>>>>>> 
>>>>>>>> Attaching my proftpd -V and sftp config
>>>>>>>> 
>>>>>>>> Compile-time Settings:
>>>>>>>> Version: 1.3.6 (stable)
>>>>>>>> Platform: LINUX [Linux 3.10.0-957.1.3.el7.x86_64 x86_64]
>>>>>>>> Built: Mon Oct 22 2018 18:48:06 UTC
>>>>>>>> Built With:
>>>>>>>> configure  '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--program-prefix=' '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--libexecdir=/usr/libexec/proftpd' '--localstatedir=/run/proftpd' '--disable-strip' '--enable-ctrls' '--enable-dso' '--enable-facl' '--enable-ipv6' '--enable-memcache' '--enable-nls' '--enable-openssl' '--disable-pcre' '--disable-redis' '--disable-xattr' '--enable-shadow' '--enable-tests=nonetwork' '--with-libraries=/usr/lib64/mysql' '--with-includes=/usr/include/mysql' '--with-modules=mod_readme:mod_auth_pam:mod_tls' '--with-shared=mod_sql:mod_sql_passwd:mod_sql_mysql:mod_sql_postgres:mod_sql_sqlite:mod_quotatab:mod_quotatab_file:mod_quotatab_ldap:mod_quotatab_radius:mod_quotatab_sql:mod_ldap:mod_ban:mod_wrap:mod_ctrls_admin:mod_facl:mod_load:mod_vroot:mod_radius:mod_ratio:mod_rewrite:mod_site_misc:mod_exec:mod_shaper:mod_geoip:mod_wrap2:mod_wrap2_file:mod_wrap2_sql:mod_copy:mod_deflate:mod_ifversion:mod_qos:mod_sftp:mod_sftp_pam:mod_sftp_sql:mod_tls_shmcache:mod_tls_memcache:mod_ifsession' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'CFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1  -m64 -mtune=generic' 'LDFLAGS=-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld' 'CXXFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1  -m64 -mtune=generic'
>>>>>>>> 
>>>>>>>> CFLAGS: -g2 -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1  -m64 -mtune=generic -Wall -fno-omit-frame-pointer -Werror=implicit-function-declaration
>>>>>>>> LDFLAGS: -L$(top_srcdir)/lib -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -rdynamic -L/usr/lib64/mysql -L/usr/lib64/mysql -L/usr/lib64
>>>>>>>> LIBS: -lacl  -lssl -lcrypto -lcap  -lmemcached -lmemcachedutil  -lssl -lcrypto  -lpam -lsupp -lnsl -lresolv -lresolv -lcrypt -ldl 
>>>>>>>> 
>>>>>>>> Files:
>>>>>>>> Configuration File:
>>>>>>>>   /etc/proftpd.conf
>>>>>>>> Pid File:
>>>>>>>>   /run/proftpd/proftpd.pid
>>>>>>>> Scoreboard File:
>>>>>>>>   /run/proftpd/proftpd.scoreboard
>>>>>>>> Header Directory:
>>>>>>>>   /usr/include/proftpd
>>>>>>>> Shared Module Directory:
>>>>>>>>   /usr/libexec/proftpd
>>>>>>>> 
>>>>>>>> Info:
>>>>>>>> + Max supported UID: 4294967295
>>>>>>>> + Max supported GID: 4294967295
>>>>>>>> 
>>>>>>>> Features:
>>>>>>>> - Autoshadow support
>>>>>>>> + Controls support
>>>>>>>> + curses support
>>>>>>>> - Developer support
>>>>>>>> + DSO support
>>>>>>>> + IPv6 support
>>>>>>>> + Largefile support
>>>>>>>> - Lastlog support
>>>>>>>> + Memcache support
>>>>>>>> + ncursesw support
>>>>>>>> + NLS support
>>>>>>>> - Redis support
>>>>>>>> - Sodium support
>>>>>>>> + OpenSSL support (FIPS enabled)
>>>>>>>> - PCRE support
>>>>>>>> + POSIX ACL support
>>>>>>>> + Shadow file support
>>>>>>>> + Sendfile support
>>>>>>>> + Trace support
>>>>>>>> - xattr support
>>>>>>>> 
>>>>>>>> Tunable Options:
>>>>>>>> PR_TUNABLE_BUFFER_SIZE = 1024
>>>>>>>> PR_TUNABLE_DEFAULT_RCVBUFSZ = 8192
>>>>>>>> PR_TUNABLE_DEFAULT_SNDBUFSZ = 8192
>>>>>>>> PR_TUNABLE_ENV_MAX = 2048
>>>>>>>> PR_TUNABLE_GLOBBING_MAX_MATCHES = 100000
>>>>>>>> PR_TUNABLE_GLOBBING_MAX_RECURSION = 8
>>>>>>>> PR_TUNABLE_HASH_TABLE_SIZE = 40
>>>>>>>> PR_TUNABLE_LOGIN_MAX = 256
>>>>>>>> PR_TUNABLE_NEW_POOL_SIZE = 512
>>>>>>>> PR_TUNABLE_PATH_MAX = 4096
>>>>>>>> PR_TUNABLE_SCOREBOARD_BUFFER_SIZE = 80
>>>>>>>> PR_TUNABLE_SCOREBOARD_SCRUB_TIMER = 30
>>>>>>>> PR_TUNABLE_SELECT_TIMEOUT = 30
>>>>>>>> PR_TUNABLE_TIMEOUTIDENT = 10
>>>>>>>> PR_TUNABLE_TIMEOUTIDLE = 600
>>>>>>>> PR_TUNABLE_TIMEOUTLINGER = 10
>>>>>>>> PR_TUNABLE_TIMEOUTLOGIN = 300
>>>>>>>> PR_TUNABLE_TIMEOUTNOXFER = 300
>>>>>>>> PR_TUNABLE_TIMEOUTSTALLED = 3600
>>>>>>>> PR_TUNABLE_XFER_SCOREBOARD_UPDATES = 10
>>>>>>>> 
>>>>>>>> Thanks again,
>>>>>>>> Sergei
>>>>>>>> 
>>>>>>>> P.S.: I noticed that forums.proftpd.org <http://forums.proftpd.org/> has an invalid SSL cert. Can we chip in to fix that or is it prohibitively expensive?
>>>>>>>> 
>>>>>>>>> On May 7, 2019, at 3:05 PM, Sergei Gerasenko <[email protected]> wrote:
>>>>>>>>> 
>>>>>>>>> Hi,
>>>>>>>>> 
>>>>>>>>> I’m running proftpd version 1.3.6. When comparing the sftp transfer speed between sshd and proftpd, I recently noticed that proftpd sftp transfers are half as fast. My test is:
>>>>>>>>> 
>>>>>>>>> 858M file
>>>>>>>>> same machine
>>>>>>>>> scp as the transfer client
>>>>>>>>> via sshd is 9.2 seconds
>>>>>>>>> via mod_sftp: 24 seconds
>>>>>>>>> 
>>>>>>>>> I’ve tried turning off compression and adjusting socket options but with practically no difference. My sftp config is basically this:
>>>>>>>>> 
>>>>>>>>> <VirtualHost ...>
>>>>>>>>> ...
>>>>>>>>> SFTPENgine on
>>>>>>>>> SFTPCompression delayed
>>>>>>>>> ...
>>>>>>>>> </VirtualHost>
>>>>>>>>> 
>>>>>>>>> Should the transfer speeds be comparable? Both sshd and proftpd are on the same machine.
>>>>>>>>> 
>>>>>>>>> Thanks for any ideas,
>>>>>>>>> Sergei
>>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>>> _______________________________________________
>>>>>>>> ProFTPD Users List   <[email protected]>
>>>>>>>> Unsubscribe problems?
>>>>>>>> http://www.proftpd.org/list-unsub.html
>>>>>>> 
>>>>>>> 
>>>>>>> -- 
>>>>>>> Gruß
>>>>>>> 
>>>>>>> Dieter
>>>>>>> 
>>>>>>> --
>>>>>>> I do not get viruses because I do not use MS software.
>>>>>>> If you use Outlook then please do not put my email address in your
>>>>>>> address-book so that WHEN you get a virus it won't use my address in the
>>>>>>> From field.
>>>>>>> 
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> ProFTPD Users List   <[email protected]>
>>>>>>> Unsubscribe problems?
>>>>>>> http://www.proftpd.org/list-unsub.html
>>>>>> 
>>>>> 
>>>>> 
>>>>>> _______________________________________________
>>>>>> ProFTPD Users List   <[email protected]>
>>>>>> Unsubscribe problems?
>>>>>> http://www.proftpd.org/list-unsub.html
>>>>> 
>>>>> 
>>>>> -- 
>>>>> Gruß
>>>>> 
>>>>> Dieter
>>>>> 
>>>>> --
>>>>> I do not get viruses because I do not use MS software.
>>>>> If you use Outlook then please do not put my email address in your
>>>>> address-book so that WHEN you get a virus it won't use my address in the
>>>>> From field.
>>>>> 
>>>>> 
>>>>> _______________________________________________
>>>>> ProFTPD Users List   <[email protected]>
>>>>> Unsubscribe problems?
>>>>> http://www.proftpd.org/list-unsub.html
>>>> 
>>> 
>>> 
>>>> _______________________________________________
>>>> ProFTPD Users List   <[email protected]>
>>>> Unsubscribe problems?
>>>> http://www.proftpd.org/list-unsub.html
>>> 
>>> 
>>> -- 
>>> Gruß
>>> 
>>> Dieter
>>> 
>>> --
>>> I do not get viruses because I do not use MS software.
>>> If you use Outlook then please do not put my email address in your
>>> address-book so that WHEN you get a virus it won't use my address in the
>>> From field.
>>> 
>>> 
>>> _______________________________________________
>>> ProFTPD Users List   <[email protected]>
>>> Unsubscribe problems?
>>> http://www.proftpd.org/list-unsub.html
>> 
> 
> 
>> _______________________________________________
>> ProFTPD Users List   <[email protected]>
>> Unsubscribe problems?
>> http://www.proftpd.org/list-unsub.html
> 
> 
> -- 
> Gruß
> 
>  Dieter
> 
> --
> I do not get viruses because I do not use MS software.
> If you use Outlook then please do not put my email address in your
> address-book so that WHEN you get a virus it won't use my address in the
> From field.
> 
> 
> _______________________________________________
> ProFTPD Users List   <[email protected]>
> Unsubscribe problems?
> http://www.proftpd.org/list-unsub.html



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