I am using the latest Bird version from the git repo under Debian. I have one dedicated NIC for the LAN, one dedicated NIC for BGP sessions and one NIC with an IP from a foreign ASN for remote maintenance. How can I make the routed traffic go through Bird but still connect to a foreign gateway via SSH through another NIC? Also the operating system updates (apt-get) should run over the third NIC and not over the bird routes.

NIC 1: LAN / OSPF
NIC 2: BGP / Peering / routed traffic over bird
NIC 3: foreign gateway fo remote maintenance of the routers debian instance