An engineer writes a firewall rule to allow OSPF between two routers and opens a TCP port for it, but the routers still do not form a neighbour relationship. Why?
Un ingénieur écrit une règle de pare-feu pour autoriser OSPF entre deux routeurs et ouvre un port TCP pour cela, mais les routeurs n'établissent toujours pas de relation de voisinage. Pourquoi ?
Answers
AOSPF uses UDP 520, so the TCP rule never matches its trafficOSPF utilise UDP 520, donc la règle TCP ne correspond jamais à son trafic
BOSPF runs directly on IP as protocol 89, with no port at allOSPF fonctionne directement sur IP en tant que protocole 89, sans aucun port
COSPF neighbours can only form across the public internetLes voisins OSPF ne peuvent se former qu'à travers l'Internet public
DOSPF needs TCP 179 opened as well before any neighbour formsOSPF a aussi besoin que TCP 179 soit ouvert pour former un voisinage
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