Virtual ISP blog / Tags / “problem”
Latest service disruptions due to bad weather conditions on teleport
February 10, 2009, 06:20 AMLatest service disruptions due to bad weather conditions 9th February 2009 :
Route Proxy
Service interruptions at 17:45 till 18:15 and 20:55 and 21:15.
We apologise for any inconvenience caused by that.
Recent downtime at last few days, at evening (peak time)
November 28, 2008, 07:45 PMWe are experience major instability on one of proxy clusters, and working to eliminate problem.
Today we made changes, that will minimize downtime in case of crash (instead of hour or minutes - few seconds), and we are working to investigate reason of problem.
Sorry for the inconvenience, and thanks for being a part of VISP.
Ethernet surge protector DIY
October 28, 2008, 11:04 PMFor people, who have skills to assemble that. If you dont have, find friend who can do that.
Instead of many diodes D1-D7, you can use DB107.
Dont forget, you need PROPER, GOOD grounding. Dont use "zero" wire in your sockets, water pipes and etc.
Here is also schematics of simple "UPS" for switch, or broadband router or wireless. Sure parts will vary, depends on required voltage.
If you dont have protection, better unplug your appliances from sockets, and ethernet network during the lightenings.
sharedzilla.com
October 26, 2008, 03:22 PMWe had few reports about sharedzilla.com not working. After investigation i notice: domain hosted by two DNS servers
208.72.170.11 208.72.170.10 rich ~ # whois 208.72.170.11 OrgName: McColo Corporation OrgID: MCCOL
We had to block whole ip range of McColo, cause of their abuse requests ignorance. Many customers in Lebanon got infected by various bots, and this bots sending private information of customers to this hosting. This is not because of this specific website.
Here you can read about McColo (search by word McColo):
http://www.secureworks.com/research/threats/warezov/?threat=warezov
http://blog.fireeye.com/research/2008/08/srizbi-and-ru-1.html
First autumn lightening
October 22, 2008, 02:09 PMFirst lightening, first minor failues. We had outage for small group of customers in specific area.
Everything must be fine now.
Recent news for 19 October
October 19, 2008, 11:14 PMWe are experiencing minor attack from Korea (most probably infected zombie computer) on our IP's. I think new router with protection will be installed at Monday to resolve such issues completely.
Do you think it is good idea to establish for lebanese people (ISP-independent) Wiki? Forum?
The forums i(maintainer of this blog, i am foreigner) found mostly political or technical.
Waiting for your feedback.
Broken/non-working websites
October 19, 2008, 07:43 AMWe are receiving numerous complaints about websites that doesn't work with us and working on other ISP.
First of all, because we are large ISP and using specific proxy technology, some website owners or hosting block our IP range, because they are thinking it is an attack. In case we receive many calls about specific website, we can run it over backup IP. If it will be blocked again - we can't help with that, you have to write complaint to website webmaster or system administrator, so possible they will change policy to more reasonable.
Second - some websites is misconfigured. Various reasons
For example we receive many complaints about kataeb.org website. Here is reason:
usa1 ~ # dnstracer www.kataeb.org
Tracing to www.kataeb.org[a] via 127.0.0.1, maximum of 3 retries
127.0.0.1 (127.0.0.1)
|\___ C0.ORG.AFILIAS-NST.INFO [org] (199.19.53.1)
| |\___ ns0.lebanonhost.net [kataeb.org] (72.18.131.233) Got
authoritative answer
| \___ ns1.lebanonhost.net [kataeb.org] (72.18.131.251)
This means website have two authoritative nameserver, and one of them give "invalid" reply. In case our DNS server query this "second" nameserver - website will be cached as broken for some time.
Right now seems they fix their problem, but seems it is many times this problem came back and customers start to blame us.
Another frequent reason - misconfigured or old(broken) PIX firewall, doesn't support unsigned TCP window size.
You can always report about broken website over https://customer.visp.net.lb/ and we will try to review reason and help you.
UPDATE: kataeb.org one of DNS again is down. Here is full technical report:
usa1 ~ # dig @72.18.131.251 kataeb.org
; <<>> DiG 9.4.1-P1 <<>> @72.18.131.251 kataeb.org
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 11488
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;kataeb.org. IN A
;; Query time: 53 msec
;; SERVER: 72.18.131.251#53(72.18.131.251)
;; WHEN: Sun Oct 19 15:08:42 2008
;; MSG SIZE rcvd: 28
usa1 ~ # dig @72.18.131.233 kataeb.org
; <<>> DiG 9.4.1-P1 <<>> @72.18.131.233 kataeb.org
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35248
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;kataeb.org. IN A
;; ANSWER SECTION:
kataeb.org. 14400 IN A 72.18.142.173
;; Query time: 75 msec
;; SERVER: 72.18.131.233#53(72.18.131.233)
;; WHEN: Sun Oct 19 15:08:49 2008
;; MSG SIZE rcvd: 44