FEC - MIB - Management Information Base

>> MIB - Management Information Base

>> Table: ipNatTable - (.1.3.6.1.4.1.272.4.5.5.1)

Description: If NAT is switched on for an interface, this table contains an entry for each session running over the interface. Table entries are creates by the system whenever a valid session is established. A session may be either a tcp connection, a udp connection or an icmp connection with icmp-echo messages (ping). A valid session is either an outgoing session or an incoming session specified in the ipNatPresetTable.

Everything behind an interface with NAT enabled is called outside. The BRICK itself and all networks connected to it via interfaces without NAT are called inside.

Table entries are removed after timeout. This timeout is specified by ipExtIfNatOtherTimeout for UDP and ICMP sessions.

specified by ipExtIfTcpTimeout for TCP sessions

16 seconds for closed TCP-sessions (FIN has been received and acknowledged in both directions).

ipNatTable
OID Name Type Access
.1 IfIndex INTEGER R

.2 Protocol ENUM R

.3 IntAddr IpAddress R

.4 IntPort INTEGER R

.5 ExtAddr IpAddress R

.6 ExtPort INTEGER R

.7 RemoteAddr IpAddress R

.8 RemotePort INTEGER R

.9 Direction ENUM R

.10 Age TimeTicks R

.11 Context INTEGER R

.12 Timeout INTEGER R

.13 State ENUM D

.14 Category ENUM R

IfIndex
This object specifies the interface, for which the session is monitored.
Protocol
This object specifies the protocol, the session is using. The value icmp specifies an icmp-echo (ping) session. ICMP error messages are processed by the appropriate tcp or udp session.
Enumerations:
icmp (1)
igmp (2)
tcp (6)
udp (17)
ipv6 (41)
gre (47)
esp (50)
ah (51)
ospf (89)
l2tp (115)

IntAddr
This object specifies the internal local IP Address used for the session. The internal address is only visible to inside networks and is translated to the external address, when a packet is being sent outside.
IntPort
This object specifies the internal local portnumber used for the session. The internal portnumber is only visible to inside networks and is translated to the external portnumber whenever a packet is being sent outside.
Range: 0 to 65535

ExtAddr
This object specifies the external local address used for the session. This address is visible outside only and will be translated to the internal address, whenever a packet is received from outside.
ExtPort
This object specifies the external local portnumber used for the session. This address is visible outside only and is translated to the internal portnumber, whenever a packet is received from outside.
Range: 0 to 65535

RemoteAddr
This object specifies the remote IP-address used for the session. This is an outside address. However, it is visible to outside networks and also to inside networks.
RemotePort
This object specifies the remote portnumber used for the session. This is an outside portnumber. However, it is visible to outside networks and also to inside networks.
Range: 0 to 65535

Direction
This object specifies, whether the session is incoming (from outside to inside) or outgoing (from inside to outside).
Enumerations:
incoming (1)
outgoing (2)

Age
This object specifies the idle period in seconds, that means the time since there was no packet transferred for the session, it is used internally for timeout purposes.
Context
This object holds a protocol specific context needed to identify sessions for ICMP unreachable address mapping.
Range: 0 to -1

Timeout
When there is no traffic associated with a NAT entry, this entry is discarded at the end of a timeout value. This object holds this timeout value in seconds.
Range: 1 to 5184000

State
Set this object to delete to remove this entry.
Enumerations:
delete (1)
active (2)

Category
Specifies the NAT category according RFC 3489 and 5389 to be applied for UDP traffic matching with this entry.
Enumerations:
full-cone (1)
restricted-cone (2)
port-restricted-cone (3)
symmetric (4)