Leningrad port supply question

[csarebel]

My understanding is that I need to capture the ports on the east shore. What if I cut the rail line to these ports? Logically it should do the trick but if it has I haven't noticed a weakening of the defence.

[Q-Ball]

Cutting RR lines is not enough in the game (and wasn't historically, either). Leningrad can draw supply over Lake Ladoga, through the port of Ostinovets, connected to ports on the eastern shore of the lake (the hardest to take of which is Svir, right on the Svir river)

You need to take either Ostinovets or Svir to isolate Leningrad, and eliminate Ladoga as a supply route

[Mentor]

If you isolate the eastern ports altogether (by linking with the Finns) then you isolate the Leningrad area as well.  Cutting the rail is not enough.

[RCHarmon]

You could also try bombing the ports.