This thread has suddenly become very relevant to me.
I moved to Israel recently. It was a chance to work in high tech and trade the markets, which open at 4:30 p.m local time.
I expected no problems with Internet trading connections, but have been unpleasantly surprised.
I signed up with the cable provider ("Hot") and one of the large, well known ISP's. I have a mainstream high speed connection, at 5 Mbps. Regular Internet browsing is no problem.
I use Ensign charts with DTN IQFeed data. The problem is that the charts don't refresh, or only do so very intermittently. I initially assumed that the problem was with the Ensign software, because they have had a lot of recent upgrades. However, after spending a long time with Ensign tech support, they concluded (apparently correctly) that the ISP was blocking the data coming from the server.
On a related but non-trading matter, my Vonage VOIP phone also doesn't work. Again, Vonage tech support concluded that the problem was the ISP not recognizing their server.
At first I thought it might just be my ISP, so I installed Ensign and IQFeed on another computer that uses DSL (Bezeq) and a different ISP, and that does have a Vonage phone working. However - Ensign still didn't work. So it appears that the problem is broader, and relates to the way Internet connections are done in Israel.
My ISP tech support seems to be helpful and claims to be working on it. They say that they don't block anything, but also haven't denied that the problem is at their end. However it is apparently a big deal to get this resolved. They have had to get somebody from their "Backbone" Department and from the cable provider involved. I have been waiting a week now, and they say it will take a while longer.
Back in Canada none of this was any issue - data feeds and VOIP worked flawlessly on a standard cable connection. If anybody has a better technical understanding of what's going on I'd appreciate it.
Thanks!