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2 Patch Release Note
Patch 86253-07 for Software Release 2.5.3
C613-10382-00 REV E
Some of the issues addressed in this Release Note include a level number. This
number reflects the importance of the issue that has been resolved. The levels
are:
Features in 86253-07
Patch 86253-06 was not released.
Patch 86253-07 includes all issues resolved and enhancements released in
previous patches for Software Release 2.5.3, and the following enhancements:
TCP Keepalive packets for FTP sessions were passing through the firewall
during the TCP setup stage with TCP Setup Proxy enabled. Keepalive
packets include sequence numbers that have already been acknowledged.
Such packets now fail stateful inspections and are dropped by the FTP
application-level gateway.
The PIM-DM prune expiry time was not reset when a State Refresh message
was received. This issue has been resolved.
When policy-based routing was active, IP packets not matching any policy-
specific routes were forwarded, even if there was no default policy route.
This issue has been resolved. Now, a route whose policy exactly matches the
policy of the packet is selected. If an exact match does not exist, a route with
the default policy will be used to route the packet. If no route is found, the
packet is discarded. The TOS field in incoming IP packets is ignored, so
packets with the TOS value set are forwarded using a route with the default
policy.
When a ping was sent to the device’s link-local address, the device flooded
the ICMP Reply packet over the VLAN. This issue has been resolved.
Occasionally when a device rebooted its OSPF routes were missing from the
route table. This issue has been resolved.
Level 1 This issue will cause significant interruption to network services, and
there is no work-around.
Level 2 This issue will cause interruption to network service, however there
is a work-around.
Level 3 This issue will seldom appear, and will cause minor inconvenience.
Level 4 This issue represents a cosmetic change and does not affect network
operation.
PCR: 03941 Module: FIREWALL Level: 2
PCR: 03961 Module: PIM, PIM6 Level: 2
PCR: 03997 Module: IPG Level: 3
PCR: 31080 Module: IPv6 Level: 2
PCR: 31104 Module: OSPF Level: 2