Re: a GOOD idea to harden OpenSSH!

2011-04-20 Thread Joachim Schipper
On Tue, Apr 19, 2011 at 11:56:51AM +0200, Peter N. M. Hansteen wrote: Alexander Schrijver alexander.schrij...@gmail.com writes: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. (...) industrial-scale password guessing (...) If you allow

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Alexander Schrijver
On Mon, Apr 18, 2011 at 07:54:13PM -0400, swilly wrote: On Wed, Mar 30, 2011 at 03:22, Alexander Schrijver alexander.schrij...@gmail.com wrote: It's a great way to keep someone out of their own system. Huh? Wouldn't securely backing up the RSA keys prevent this? If you are mindful enough

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Alexander Schrijver
Your right that there are other ways to still login. I meant you're.

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Peter N. M. Hansteen
Alexander Schrijver alexander.schrij...@gmail.com writes: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. We've seen quite a bit of what appears to be industrial-scale password guessing (google 'hail mary cloud' or a few more obvious keywords), so on

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Edho P Arief
On Tue, Apr 19, 2011 at 4:54 PM, Edho P Arief edhopr...@gmail.com wrote: On Tue, Apr 19, 2011 at 4:33 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. it may be just me but I'm having

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Edho P Arief
On Tue, Apr 19, 2011 at 4:33 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. it may be just me but I'm having problem in understanding this statement.

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Kevin Chadwick
On Tue, 19 Apr 2011 16:54:45 +0700 Edho P Arief wrote: On Tue, Apr 19, 2011 at 4:33 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. it may be just me but I'm having problem in

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Tomas Bodzar
On Tue, Apr 19, 2011 at 11:56 AM, Peter N. M. Hansteen pe...@bsdly.net wrote: Alexander Schrijver alexander.schrij...@gmail.com writes: I think it's a bad idea to disable ssh login while someone is bruteforcing your account. We've seen quite a bit of what appears to be industrial-scale

Re: a GOOD idea to harden OpenSSH!

2011-04-19 Thread Randal L. Schwartz
Peter == Peter N M Hansteen pe...@bsdly.net writes: Peter We've seen quite a bit of what appears to be industrial-scale password Peter guessing (google 'hail mary cloud' or a few more obvious keywords), so Peter on any internet-facing system the probability that someone is trying Peter to

Re: a GOOD idea to harden OpenSSH!

2011-04-18 Thread swilly
On Wed, Mar 30, 2011 at 03:22, Alexander Schrijver alexander.schrij...@gmail.com wrote: It's a great way to keep someone out of their own system. Huh? Wouldn't securely backing up the RSA keys prevent this? If you are mindful enough to use keys in the first place and don't back up such critical

a GOOD idea to harden OpenSSH!

2011-03-30 Thread nagygabor88
I'm writing here, because the ssh dev list says: Mail Delivery Status Notification (Delay) [Status: Error, Address: openssh-unix-...@mindrot.org, ResponseCode 451, Temporary failure, please try again later.] So: What is you're opinion about the next idea? Please write down ++/-- thoughts:

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Mihai Militaru
Isn't limiting the number of retries obtaining the same result? I mean, limiting the number of retries to 5 and having to wait for 10 seconds after five failed attempts will have the same outcome without the hassle, IMO. On Tue, 29 Mar 2011 22:58:53 -0700 nagygabor88 nagygabo...@zoho.com wrote:

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Gregory Edigarov
IMHO it is absolutelly useless, objections are: 1. You can limit connections using firewall. 2. You already have the feature by name limiting the number of retries 3. If you really want PROTECTION - you should turn off password authentication completelly and use RSA key with passphrase. On Wed,

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Tomas Bodzar
Don't reinvent wheel http://home.nuug.no/~peter/pf/en/bruteforce.html On Wed, Mar 30, 2011 at 7:58 AM, nagygabor88 nagygabo...@zoho.com wrote: I'm writing here, because the ssh dev list says: Mail Delivery Status Notification (Delay) [Status: Error, Address: openssh-unix-...@mindrot.org,

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Alexander Schrijver
On Wed, Mar 30, 2011 at 10:06:14AM +0300, Gregory Edigarov wrote: IMHO it is absolutelly useless, objections are: 1. You can limit connections using firewall. 2. You already have the feature by name limiting the number of retries 3. If you really want PROTECTION - you should turn off password

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Alexander Schrijver
On Wed, Mar 30, 2011 at 03:00:18PM +0700, Edho P Arief wrote: On Wed, Mar 30, 2011 at 2:22 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: It's a great way to keep someone out of their own system. Unless you enable root login... How does that help?

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Joel Wiramu Pauling
On 30 March 2011 20:22, Alexander Schrijver alexander.schrij...@gmail.com wrote: On Wed, Mar 30, 2011 at 10:06:14AM +0300, Gregory Edigarov wrote: IMHO it is absolutelly useless, objections are: 1. You can limit connections using firewall. 2. You already have the feature by name limiting the

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Edho P Arief
On Wed, Mar 30, 2011 at 3:11 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: On Wed, Mar 30, 2011 at 03:00:18PM +0700, Edho P Arief wrote: On Wed, Mar 30, 2011 at 2:22 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: It's a great way to keep someone out of their own

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Marian Hettwer
On Wed, 30 Mar 2011 09:22:44 +0200, Alexander Schrijver alexander.schrij...@gmail.com wrote: On Wed, Mar 30, 2011 at 10:06:14AM +0300, Gregory Edigarov wrote: IMHO it is absolutelly useless, objections are: 1. You can limit connections using firewall. 2. You already have the feature by name

Re: a GOOD idea to harden OpenSSH!

2011-03-30 Thread Edho P Arief
On Wed, Mar 30, 2011 at 2:22 PM, Alexander Schrijver alexander.schrij...@gmail.com wrote: It's a great way to keep someone out of their own system. Unless you enable root login...