| 1 |
Hi, |
| 2 |
I to have such a script that blocks ip's after 5 'opportunist' attempts. |
| 3 |
See below. How do I rc-update this to default? |
| 4 |
Cheers. |
| 5 |
|
| 6 |
#!/bin/sh |
| 7 |
# Start fresh |
| 8 |
iptables -F |
| 9 |
|
| 10 |
# Deal with SSH connections. |
| 11 |
iptables -N sshchain |
| 12 |
iptables -N sshscan |
| 13 |
|
| 14 |
# Do the block |
| 15 |
iptables -A INPUT -i eth0 -p tcp -m tcp --dport 22 -j sshchain |
| 16 |
iptables -A sshchain -m conntrack --ctstate NEW -m recent --name |
| 17 |
sshattempts --set |
| 18 |
iptables -A sshchain -m recent --rcheck --seconds 60 --hitcount 10 |
| 19 |
--name sshattempts --rsource -j sshscan |
| 20 |
|
| 21 |
# log when it happens, |
| 22 |
iptables -A sshscan -m recent --rcheck --hitcount 3 --seconds 600 -j LOG |
| 23 |
--log-prefix "SSH to many: " |
| 24 |
iptables -A sshscan -j DROP |
| 25 |
################## |
| 26 |
|
| 27 |
|
| 28 |
ps |
| 29 |
MERRY CHRISTMAS |
| 30 |
|
| 31 |
~ |
| 32 |
|
| 33 |
|
| 34 |
|
| 35 |
|
| 36 |
|
| 37 |
On Fri, 2005-12-23 at 05:26 -0600, Justin Krejci wrote: |
| 38 |
> Firestarter to me was like using a ZoneAlarm type of windows firewall program. |
| 39 |
> It was very super easy to configure but not very flexible. I could not figure |
| 40 |
> out how to specify UDP vs TCP on rules. This seemed like a great program for |
| 41 |
> your average run of the mill home/desktop user. |
| 42 |
> |
| 43 |
> For a GUI I settled on Kmyfirewall as it was extraordinarily easy to configure |
| 44 |
> and use once I learned the basics of how iptables worked. I also wrote a perl |
| 45 |
> script to automatically block IP addresses of hosts that do brute force SSH |
| 46 |
> attempts. The IP addresses are automatically unblocked after 1 day. Every |
| 47 |
> time a change is made it sends out an email. This has really helped to keep |
| 48 |
> my log files cleaner instead of seeing 500 failed login attempts in a 3 hour |
| 49 |
> span from one IP address, then multiply that by 1-5 IP addresses per day. |
| 50 |
> |
| 51 |
> Note Kmyfirewall is very nice but is still considered beta and it shows but it |
| 52 |
> is not broken in any way that I can tell, just the interface has a couple of |
| 53 |
> small bugs AFAICT. |
| 54 |
> |
| 55 |
> On Thursday 22 December 2005 05:17 am, Gavin Seddon wrote: |
| 56 |
> > It's alright for some. I eat lunch with a couple of dogs (canine). |
| 57 |
> > Gavin |
| 58 |
> > |
| 59 |
> > On Wed, 2005-12-21 at 09:01 -0800, Steve Herber wrote: |
| 60 |
> > > I would recommend you use Shorewall for an easy way to configure and |
| 61 |
> > > manage you iptables based linux firewall. The documentation is |
| 62 |
> > > excellent. Plus, I like to have lunch with the author. |
| 63 |
> > > |
| 64 |
> > > shorewall.net |
| 65 |
> > > |
| 66 |
> > > Steve Herber herber@×××××.com work: 206-221-7262 |
| 67 |
> > > Security Engineer, UW Medicine, IT Services home: 425-454-2399 |
| 68 |
> > > |
| 69 |
> > > On Wed, 21 Dec 2005, Gavin Seddon wrote: |
| 70 |
> > > > Hi, |
| 71 |
> > > > I have merged iptables. Will they start at boot and is there a link |
| 72 |
> > > > for configuring on Gentoo? |
| 73 |
> > > > Thanks. |
| 74 |
> > > > -- |
| 75 |
> > > > Dr Gavin Seddon |
| 76 |
> > > > School of Pharmacy and Pharmaceutical Sciences |
| 77 |
> > > > University of Manchester |
| 78 |
> > > > Oxford Road, Manchester |
| 79 |
> > > > M13 9PL, U.K. |
| 80 |
> > > > |
| 81 |
> > > > -- |
| 82 |
> > > > gentoo-amd64@g.o mailing list |
| 83 |
> > |
| 84 |
> > -- |
| 85 |
> > Dr Gavin Seddon |
| 86 |
> > School of Pharmacy and Pharmaceutical Sciences |
| 87 |
> > University of Manchester |
| 88 |
> > Oxford Road, Manchester |
| 89 |
> > M13 9PL, U.K. |
| 90 |
-- |
| 91 |
Dr Gavin Seddon |
| 92 |
School of Pharmacy and Pharmaceutical Sciences |
| 93 |
University of Manchester |
| 94 |
Oxford Road, Manchester |
| 95 |
M13 9PL, U.K. |
| 96 |
|
| 97 |
-- |
| 98 |
gentoo-amd64@g.o mailing list |
Archives