OverviewThe east ridge ("Felsensteig") and the northeast wall (Randkluftsteig) are very close, and the lower eastridge can be seen as different access to the northeast wall.
Therefore I combine here both in one description, also because sometimes people decide in front of the northeast wall crevasse to change to the east ridge (10 minute descent from northeast wall entry to east ridge entry via the glacier).
I recommend not to use the cablecar from Ramsau, but ascend from Dachsteinsuedwand hut via Hunerscharte cableroute (see approach below). It takes 4 to 5 hours from the hut to the summit (1100m height difference). From upper cablecar station it takes 1.5 to 2 hours to the summit (300m height difference).
ApproachStarting point is Dachsteinsuedwand hut (1910m), when climbing up to the glacier via Hunerscharte cableroute, or base station of Dachsteinsuedwand cablecar (1680m) if using that. From Dachsteinsuedwand hut ascending east to a crest and proceeding to a saddle, then a rocky steep slope upwards to the "untere Schwadering". On the eastside of the cirque "obere Schwadering" upwards, then left to the base of a wall. Now follow the iron handholds and cables to Hunerscharte (Huner notch). From here to the left, via Schladminger glacier, in a few minutes to the upper station of the cablecar (2685m).
From the cablecar station in 45 minutes crossing the upper parts of Hallstaetter glacier to Seethaler hut (Dachsteinwarte hut) (2740m, overnight stay only allowed in emergency cases).
Route Description(see also this foto to get an overview of the east normal routes).
East ridge: From Dachsteinwarte hut head northwest to the base of a noticeable buttress. Entry to the rock mostly without crevasse. Via easy cracks (iron handholds and ropes have been removed at the base recently) and short ledges upwards, then to the flat ridge of the "Schulter" (shoulder). Cross it and the following steep snowfield to the left part of the northeast wall. At a small terrace leave the eastridge by following the cables (the direct eastridge starts here: no cables, UIAA III+, magnificent short and very exposed ridge climb). Follow a ledge where black overhangs form a vault over it (Mecklenburg ledge). The ledge leads you downwards to the middle part of the northeast route. It is sometimes icy, and at the end a steep and often hard snowfield must be crossed.
Northeast route (Randkluftanstieg): From Dachsteinwarte hut head northwest around the base of a noticeable buttress. Pass the entry to the east ridge and ascend over the glacier not to far away from the base of the left (eastern) wall (take care of crevasses!). Approach the end of the rock gully which comes down from the summit. Cross the crevasse at the base where it is possible (not to far away from the gully) and enter the gully. Follow the big pitons to the summit.