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1. Very similar process happens when packet's destination is router (routing input):Packet enters prerouting processing:
   1. - check if there is a hotspot and modify the packet for hotspot use;
   2. - process packet through RAW prerouting chain;
   3. - send packet through connection tracking;
   4. - process packet through Mangle prerouting chain;
   5. - process packet through NATs dst-nat chain;
2. Run packet through routing table to make routing decision;
3. Packet enters forward process;
   1. - check ttl value;
   2. - process packet through Mangle forward chain;
   3. - process packet through Filter forward chain;
   4. - send packet to accounting processes;
4.  Packet enters postrouting process; 
   1. - process packet through Mangle postrouting chain;
   2. - process packet through NATs src-nat chain;
   3. - if there is a hotspot undo any modifications made in hotspot-in;
   4. - process packet through queue tree (HTB Global);
   5. - process packet through simple queues;
5.  Check if there is ipsec and process through ipsec polices;

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