Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.
Buying anything on Amazon? Please use the Geekzone Amazon aff link.


aw



254 posts

Ultimate Geek
+1 received by user: 2

Subscriber

Topic # 99056 12-Mar-2012 07:41 Send private message

*sigh*

I have an Asterisk box at my home office. I have it set up for remote extensions so I can use my smartphone as an extension when both home and away. All works fine.

I have long, random passwords and I have fail2ban protecting the server, which works well.

Despite that, I've noticed I'm still finding myself the target of intense attack attempts.

Fail2Ban sends an e-mail when it bans an IP, and I saw last night at 5:21pm it banned 208.115.231.210  after "120 attempts against Asterisk".

This morning I noticed via iptables that that same IP is still banned, and I see via Wireshark that despite getting no response, that same IP is still sending around 100 SIP registration attempts a second. That's data I'm paying for!

I seem to get hit with one of these persistent buggers about once a month, and the attack can go on for as long as 48 hours and consume multiple GBs of data.

Is this just one of the realities of having an externally accessible Asterisk box?

Create new topic
1332 posts

Uber Geek
+1 received by user: 152
Inactive user


  Reply # 593861 12-Mar-2012 08:12 Send private message

Pretty much :C

All you can do is work with your provider to see if they will null route the attempts. If you have a residential connection this will be much harder than a business connection with SLA.

20203 posts

Uber Geek
+1 received by user: 1766

Moderator
Trusted
Biddle Corp
Subscriber

  Reply # 593865 12-Mar-2012 08:18 Send private message

Unless you funny understand the risks associated with doing so no PBX should ever be internet facing. VPN access for remote extensions is always the most secure way of allowing remote access.

While your firewall has blocked that IP the bot still knows you have a PBX there and isn't smart enough to realise it's been blocked.


aw



254 posts

Ultimate Geek
+1 received by user: 2

Subscriber

  Reply # 594541 13-Mar-2012 13:08 Send private message

OK I'll investigate VPN options. Thanks for the advice.

Anyone else VPN their iPhone back to their home PABX?

1209 posts

Uber Geek
+1 received by user: 265


  Reply # 594545 13-Mar-2012 13:15 Send private message

aw: *sigh*

I have an Asterisk box at my home office. I have it set up for remote extensions so I can use my smartphone as an extension when both home and away. All works fine.

I have long, random passwords and I have fail2ban protecting the server, which works well.

Despite that, I've noticed I'm still finding myself the target of intense attack attempts.

Fail2Ban sends an e-mail when it bans an IP, and I saw last night at 5:21pm it banned 208.115.231.210  after "120 attempts against Asterisk".

This morning I noticed via iptables that that same IP is still banned, and I see via Wireshark that despite getting no response, that same IP is still sending around 100 SIP registration attempts a second. That's data I'm paying for!

I seem to get hit with one of these persistent buggers about once a month, and the attack can go on for as long as 48 hours and consume multiple GBs of data.

Is this just one of the realities of having an externally accessible Asterisk box?


that IP seems to come from http://www.limestonenetworks.com mite be worth putting in an abuse report





3043 posts

Uber Geek
+1 received by user: 223

Trusted
Subscriber

  Reply # 594549 13-Mar-2012 13:22 Send private message

1080p: Pretty much :C

All you can do is work with your provider to see if they will null route the attempts. If you have a residential connection this will be much harder than a business connection with SLA.


Haha not if they are Orcon, flat out refused to null route one of our internal IPs are DDoS to it were taking out our entire rack. Took them 3 months of us begging to finally look at a fix which was a 1gbps port upgrade which solved the issues overnight. 





69 posts

Master Geek


  Reply # 597585 20-Mar-2012 11:30 Send private message

vpn the best way for remote phones. Iphone + vpn options here - http://www.linuxpinguin.de/2009/06/secure-encrypted-phone-calls-with-your-iphone/

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

Crew Drinking on Flights - Why!?
Created by networkn, last reply by Dratsab on 21-Dec-2014 22:04 (27 replies)
Pages... 2


Police Camera Van Disguise
Created by Reanalyse, last reply by lNomNoml on 21-Dec-2014 23:33 (75 replies)
Pages... 3 4 5


Do I have the right to return this?
Created by corksta, last reply by kiwibro111 on 21-Dec-2014 23:54 (45 replies)
Pages... 2 3


Slaughter of Innocents
Created by networkn, last reply by networkn on 19-Dec-2014 17:46 (64 replies)
Pages... 3 4 5


Spray Foam Insulation
Created by AACTech, last reply by timbosan on 19-Dec-2014 16:58 (36 replies)
Pages... 2 3


Couriers starting to charge for redelivery
Created by mattwnz, last reply by rendezvous on 19-Dec-2014 11:45 (78 replies)
Pages... 4 5 6


Google Chromecast now available in New Zealand
Created by freitasm, last reply by michelangelonz on 20-Dec-2014 10:38 (155 replies)
Pages... 9 10 11


forgot how to unlock a car door
Created by joker97, last reply by joker97 on 21-Dec-2014 07:34 (53 replies)
Pages... 2 3 4



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.