traveling alone

Make a search on the forum with the words "woman / female" "single/solo"" traveller," and you will find a lot of answers and useful advice. The conclusion is "YES"

absolutely there 's no problem for you in Syria.

I wish you a nice trip

You will be hastled a lot. Not a dangerous sort of hastling, but serious invasion of privacy hastle. It won't be uncommon for a man sitting next to you on a bus to gradually put his hand on your knee. Or have your "bottom" touched in a crowded area. Lots of staring and "cat calls".

#3 is overstating the degree of harrassment. That it sounds like the norm rather than an infrequent incident that may or may not happen. It's not Egypt. Syria is safe for women to travel alone in, safer than most countries in fact.

You may be stared at, which is harmless enough, but if it becomes annoying then smile and say hello and they will more than likely shyly disappear soon after. As for a hand creeping onto your knee, stand up and make a hell of a fuss, demand that the culprit move, or you yourself move to another seat. Don't tolerate anything like that for a second. Or bum pinching in the souk, (which happened to me), loudly demand to know who did it, make a big fuss by all accounts. The shame/embarrassment these guys suffer when fellow Syrians are made aware of what they have done, is probably enough to deter them from doing it again, as I said, it's not Egypt. And 'cat calls' - I quite like 'cat calls' :) , so can't comment on that!

I'm sure #4 can speak from personal experience therefore making her more qualified to answer (i'm a guy afterall). And Egypt is much "worse" for this kind of thing. However, after living in the region for some years, i can certainly say that making a big fuss will stop the action, but will not deter them from doing it again. You most certainly should stop any unwanted action in any matter necessary. My friend would physically hit the men. But know that, in their eyes, the embarrassment is yours not the guys.

But let me reiterate, Syria is safe. These situations are not dangerous, just uncomfortable. Syria is a wonderful country with friendly people and beautiful places. Don't let a couple of bad apples spoil what will otherwise be a great trip.

i'm in the same situation, i'll be in aleppo mostly, though! from what ive read, people on forums seem to be much more relaxed than travel guides - the latter err on the side of caution in comparison, but of course that is preferable to the other option...
apparently, if the harrassment bothers you, simply cry out "Halas!" which means enough in Arabic. Personally I would not smile and greet the men, as that is against the norm and can only make it more of an embarrassment for you, along the same lines that fluffy_bunny was pointing out.

when will you be going? it would be good to meet if we're there at the same time? :)

I travelled to Syria as a couple but we met plenty of women travelling alone and none of them had any problems. People in Syria are very friendly and more genuinly happy to help tourists than for instance in Egypt where many offers of help come with the expectation of getting money or getting you into their shop etc. If you have been to Egypt or Morocco you won't even notice any hassle in Syria.

One piece of advice is to choose budget hotels which are popular with backpackers as opposed to those only frequented by Middle Eastern men.