search for: skufca

On Sun, Aug 30, 2015 at 6:57 AM, Bostjan Skufca <bostjan at a2o.si> wrote: > Nico, > > those were my thoughts, exacly, except that I was thinking about using "dig > +short HOST | ..." which has the cleanest output of all. Excellent point. I like it! It can get a bit confusing with round-robin DNS, which can give mult...

Hi there, (context: I was optimizing Roundcube mailbox list server response, and in that 300-400ms response time, around 170ms is spent on single fgets() call which is waiting IMAP repsonse to "SELECT MyMailbox" command) I straced dovecot and of the whole request/response process, around 30ms is spent for everything else, and overwhelming majority of time (150-170ms) is spent for

If I want to specify for LAN addresses that I don't want to deal with host keys, how do I do that? Understanding the risks, knowing almost everyone will say not to do this - it's a horrible idea, but deciding I want to do it anyway. Tired of having to remove entries from known_hosts with the multiple VM's I have that often change fingerprints, and am willing to live with the risks.

You need to disable ?ChallengeResponse? (aka keyboard-interactive) authentication, not password authentication, to protect against this attack. On Jul 22, 2015, at 1:56 PM, Bostjan Skufca <bostjan at a2o.si> wrote: > > And to answer your question about what to do, you have three options: > - disable access to ssh with a firewall > - disable password authentication > - install and enable IDS to mitigate brute forcing > > b. > > > On 22 July 201...

On Thu, 27 Aug 2015, Bostjan Skufca wrote: > Are you connecting by specifying "ssh HOSTNAME" instead of "ssh IP.IP.IP.IP"? > > If this is the case, then "Host 192.168.*.*" line never matches when > you think it should. > > From ssh_config manpage: > "The host is the hostname...

Hi, is there a particular reason why this feature is "user" based and not "user-pubkey" based? What I mean is that it works for installation with small number of pubkeys per user. But imagine i.e. a GitHub scale - all users logging in as user "git". On each auth request all the keys from database would be fetched and feeded to OpenSSH. Now I am only asking this out

...smbclient is a bit faster (0.5-1MB but not always). Using other linux workstations (faster machine) i could only boost transfer rate to 5.0-5.5MB/s. Server and workstation machines are using 2.4.27 and samba 2.2.12 (slackware distro). Is anyone familiar with this issue? Best regards, Bostjan Skufca

On Fri, Aug 28, 2015 at 8:48 AM, Bostjan Skufca <bostjan at a2o.si> wrote: > On 27 August 2015 at 05:01, Damien Miller <djm at mindrot.org> wrote: >> Yeah, it's unfortunately quite difficult to implement address matching >> in ~/.ssh/config because of the interplay of Host matching, Hostname >> directives, ho...

...s. Sum: 32-bit shared: OK 32-bit static: OK 64-bit shared: OK 64-bit static: SEGFAULT on first client disconnect How should I start solving this problem? I am proficient in PHP and other Untyped languages but I am only moderately familiar with C programming. Thank you for your responses, Bostjan Skufca --------------[ Segfault output from strace ]------------------------------- # strace -p 21976 Process 21976 attached - interrupt to quit select(6, [3], NULL, NULL, NULL) = ? ERESTARTNOHAND (To be restarted) --- SIGCHLD (Child exited) @ 0 (0) --- wait4(-1, [{WIFEXITED(s) && WEXITS...

Perfect, thanks. This winds up working for me (as far as I've tested so far.) Match exec "ping -q -c 1 -t 1 %n | grep '192\.168\.'" StrictHostKeyChecking no UserKnownHostsFile none On Wed, Aug 26, 2015 at 11:47 PM, Bostjan Skufca <bostjan at a2o.si> wrote: > (+cc list) > > You could use something in the following manner: > > Match originalhost * exec "/check/if/this/hostname/is/on/lan.sh" > ...(lan-specific opts)... > > But this one is a bit tricky to get right, as order of...

Thanks for clarification. One question though: As far as I have tested openssh, it logs every unsuccessful authentication attempt on the very moment it becomes unsuccessful, not after the connection is closed (after timeout or when reaching max auth attempts). Is this true or not even for this attack or not? Because if it is true, if there is a IDS system that bans IP after X failed logins,

On Mon, 4 Jan 2016, Peter Stuge wrote: > Hi Kaleb, > > Kaleb Himes wrote: > > OpenSSH port Location: https://github.com/kaleb-himes/openssh-portable.git > > I'm afraid this repository is too messy to be useful. :\ > > You need to use the features offered by git to preserve commit ids if > anyone else besides yourself is going to be able to work with this, >

I read an article today about keyboard interactive auth allowing bruteforcing. I'm afraid I have minimal understanding of what keyboard-interactive really does. What does it do, and should I have my clients set it to off in sshd_config? --- Scott Neugroschl | XYPRO Technology Corporation 4100 Guardian Street | Suite 100 |Simi Valley, CA 93063 | Phone 805 583-2874|Fax 805 583-0124 |

On Mon 2016-01-04 20:35:05 -0500, Bostjan Skufca wrote: > Would it make sense to refactor (if it is not done yet) openssh to use > generic API for communicating with any SSL implementation? Or is the > general stance on this subject "the new SSL implementation should provide > openssl-compatible API to be usable with openssh&quo...

Hello everybody! This is probably going to be a classic question but I cannot find a decent answer on net. I have samba server set up and the following things work flawlessly: - iperf shows 92% link utilization - FTP/SCP/HTTP transfers work in 10MB/s range. However, when I mount samba share with linux client (mount.cifs) the link utilization cannot bypass cca 33%. Transfer speeds constantly

Hi all, authentication forwarding depends much on the environment it is used in, but generally on shared hosts it is considered insecure, as this documentation and common sense tell us: http://unixwiz.net/techtips/ssh-agent-forwarding.html Anyway, I have an auth forwarding security enhancement proposal. I hope I am not duplicating someone else's words/thoughts, please notify me if this is

On Fri, Aug 28, 2015 at 11:51 PM, Walter Carlson <wlcrls47 at gmail.com> wrote: > On Thu, Aug 27, 2015 at 12:26 AM, Walter Carlson <wlcrls47 at gmail.com> wrote: > >> Perfect, thanks. This winds up working for me (as far as I've tested so >> far.) >> >> Match exec "ping -q -c 1 -t 1 %n | grep '192\.168\.'" >>

On 04/10/2016 10:27 AM, Adrian Minta wrote: > It will be nice if the "SELECT MyMailbox" command will be "SELECT > mymailbox LIMIT 100" or something, to get the first files since only the > last messages are shown to the user. SELECTing a mailbox has nothing to do with FETCHing messages, so above does not make much sense. I don't know dovecot's code, but I

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tue, 12 Apr 2016, Bostjan Skufca wrote: > On 12 April 2016 at 10:23, A.L.E.C <alec at alec.pl> wrote: > >> I don't know dovecot's code, but I suppose it uses uidlist file to get >> mailbox statistics that it returns as EXISTS, RECENT, UNSEEN, UIDNEXT, >> UIDVALIDITY, etc, which are required by...

Hi again, puppetd started to hang with 100% CPU usage all of the sudden. Strace just keeps repeating these 2 lines: --- SIGVTALRM (Virtual timer expired) @ 0 (0) --- sigreturn() = ? (mask now []) In logs it hangs with this message: debug: Calling fileserver.describe But lots of these fileserver.describe calls prior to hang are successful. If I run it with puppetd