Need Assistance - Firewall keeps going down

[pmandra]

Hi,
This is a follow-up to my post the other day regarding my firewall, which seems to require a reboot every other day to remain functional. I suspect perhaps it is a denial-of-service attack. I cannot telnet into the pix firewall when it is not functional and need to physically re-boot it.
The firewall is a pix 515 R and is running IOS v4.4. I am not sure if syslogging is enabled since I inherited monitoring the firewalls just recently and the records aren't good here. The config is as follows:
hostname cobipix
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol smtp 25
fixup protocol sqlnet 1521
names
pager lines 24
logging on
no logging timestamp
no logging console
no logging monitor
no logging buffered
no logging trap
logging facility 20
logging queue 512
interface ethernet0 auto
interface ethernet1 auto
mtu outside 1500
mtu inside 1500
ip address outside xx.xx.xx.xx 255.255.255.224
ip address inside 192.168.1.254 255.255.255.0
arp timeout 14400
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
conduit permit tcp any any eq 5631
conduit permit udp any any eq 5632
outbound 10 permit 0.0.0.0 0.0.0.0 5631 tcp
outbound 11 permit 0.0.0.0 0.0.0.0 5632 udp
no rip outside passive
no rip outside default
no rip inside passive
no rip inside default
route outside 0.0.0.0 0.0.0.0 66.158.63.65 1
timeout xlate 3:00:00 conn 1:00:00 half-closed 0:10:00 udp 0:02:00
timeout rpc 0:10:00 h323 0:05:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
telnet 192.168.1.0 255.255.255.0
telnet timeout 5
terminal width 80

Any assistance would be appreciated. The conduit ports are open for pc anywhere.
Thanks!

 

[themut]

Are you running v4.4? First I would strongly recommend you to upgrade to at least 6.1(4). The version you are running is extremely old and it has very limited capabilities compared to any 6.1 or above image. It may be due to a bug in the old code.

 

[baddos]

You are missing some information in your config. Please post the rest of it.

 

[pmandra]

Here's the rest of the config:
cobipix# show intinterface ethernet0 "outside" is up, line protocol is up
Hardware is i82559 ethernet, address is 0003.6bf6.bed1
IP address x.x.x.x, subnet mask 255.255.255.224
MTU 1500 bytes, BW 100000 Kbit full duplex
50658 packets input, 58760925 bytes, 0 no buffer Received 65 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
38135 packets output, 3204922 bytes, 0 underruns
0 unicast rpf drops
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collisions, 0 deferred
0 lost carrier, 0 no carrier
interface ethernet1 "inside" is up, line protocol is up Hardware is i82559 ethernet, address is 0003.6bf6.bed2
IP address 192.168.1.254, subnet mask 255.255.255.0
MTU 1500 bytes, BW 100000 Kbit full duplex
43408 packets input, 3836249 bytes, 0 no buffer Received 4592 broadcasts, 0 runts, 0 giant
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
50754 packets output, 58493940 bytes, 0 underruns
0 unicast rpf drops
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collisions, 0 deferred
0 lost carrier, 0 no carrier