Translation creation failed, DMZ, clear xlate

[wampa]

Hello all:

I'm stumped!

I have a PIX 520 with several interfaces, one outside, one inside and one in a DMZ. What happens is that randomly, some inside workstations are unable to contact any servers in the DMZ. The inside workstations are PAT'ed into the DMZ.

When this happens, the log recieves:

305006: regular translation creation failed for tcp src inside: A.A.103.197/1129 dst dmz1:C.C.77.12/80

When I issue a clear xlate, the problem goes away, and all of the internal workstations are able to contact hosts in the DMZ again. It will work for several hours (sometimes even days or weeks), and then the whole cycle starts again.

Below is the PIX config, and I have obfuscated the IP addresses (let me know if it is too obfuscated). Please let me know if you need more output.

PIX Version 6.1(3)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 failover security10
nameif ethernet3 dmz1 security15
nameif ethernet4 dmz2 security20
nameif ethernet5 dmz3 security25
hostname pixfirewall
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names
access-list 105 permit ip A.A.0.0 255.255.0.0 H.H.250.0 255.255.255.240
access-list 105 permit ip Z.Z.0.0 255.255.0.0 H.H.250.0 255.255.255.240
access-list 105 permit ip Y.Y.0.0 255.255.0.0 H.H.250.0 255.255.255.240
access-list 105 permit ip X.X.0.0 255.255.0.0 H.H.250.0 255.255.255.240
access-list 101 permit ip X.X.0.0 255.255.0.0 X.X.97.0 255.255.255.0
access-list 101 permit ip Y.Y.0.0 255.255.0.0 X.X.97.0 255.255.255.0
access-list 101 permit ip Z.Z.0.0 255.255.0.0 X.X.97.0 255.255.255.0
access-list 101 permit ip A.A.0.0 255.255.0.0 X.X.97.0 255.255.255.0
access-list 101 permit ip B.B.0.0 255.255.0.0 X.X.97.0 255.255.255.0
pager lines 24
logging on
logging timestamp
logging standby
logging console warnings
logging buffered warnings
logging trap warnings
logging history warnings
logging facility 4
logging host inside B.B.12.121
no logging message 106011
interface ethernet0 10baset
interface ethernet1 100basetx
interface ethernet2 100full
interface ethernet3 auto
interface ethernet4 auto shutdown
interface ethernet5 auto shutdown
mtu outside 1500
mtu inside 1500
mtu failover 1500
mtu dmz1 1500
mtu dmz2 1500
mtu dmz3 1500
ip address outside P.P.P.10 255.255.255.0
ip address inside X.X.100.11 255.255.0.0
ip address failover C.C.250.1 255.255.255.0
ip address dmz1 C.C.77.1 255.255.255.0
ip address dmz2 127.0.0.1 255.255.255.255
ip address dmz3 127.0.0.1 255.255.255.255
ip audit info action alarm
ip audit attack action alarm
ip local pool quadpool X.X.97.1-X.X.97.20
failover
failover timeout 0:00:00
failover poll 15
failover ip address outside P.P.P.11
failover ip address inside X.X.100.9
failover ip address failover C.C.250.2
failover ip address dmz1 C.C.77.2
failover ip address dmz2 0.0.0.0
failover ip address dmz3 0.0.0.0
failover link failover
pdm location Y.Y.100.0 255.255.255.0 inside
pdm history enable
arp timeout 14400
global (outside) 1 P.P.P.201-P.P.P.250 netmask 255.255.255.0
global (outside) 1 P.P.P.4 netmask 255.255.255.0
global (dmz1) 1 C.C.77.200-C.C.77.250 netmask 255.255.255.0
nat (inside) 0 access-list 105
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
nat (dmz1) 1 0.0.0.0 0.0.0.0 0 0
static (inside,outside) P.P.P.200 X.X.100.10 netmask 255.255.255.255 2 0
static (inside,outside) P.P.P.20 X.X.95.20 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.21 X.X.95.21 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.24 X.X.90.100 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.3 X.X.16.21 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.33 X.X.120.21 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.28 X.X.16.25 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.40 X.X.95.6 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.27 X.X.16.4 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.17 X.X.95.19 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.29 X.X.16.26 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.41 X.X.16.52 netmask 255.255.255.255 0 0
static (dmz1,outside) P.P.P.36 C.C.77.12 netmask 255.255.255.255 0 0
static (inside,dmz1) X.X.16.62 C.C.77.12 netmask 255.255.255.255 0 0
static (inside,dmz1) X.X.16.61 C.C.77.11 netmask 255.255.255.255 0 0
static (inside,dmz1) X.X.16.63 C.C.77.13 netmask 255.255.255.255 0 0
static (dmz1,outside) P.P.P.37 C.C.77.11 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.38 X.X.16.63 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.42 X.X.16.20 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.14 Y.Y.16.100 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.15 Y.Y.16.101 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.11 X.X.16.75 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.79 X.X.16.5 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.44 X.X.16.28 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.45 A.A.20.152 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.46 A.A.20.156 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.47 X.X.16.43 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.48 A.A.20.153 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.49 A.A.20.160 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.50 A.A.102.49 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.51 A.A.20.202 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.52 A.A.20.166 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.53 A.A.20.165 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.54 X.X.16.27 netmask 255.255.255.255 0 0
static (inside,outside) P.P.P.55 X.X.16.15 netmask 255.255.255.255 0 0
static (inside,dmz1) X.X.16.37 C.C.77.23 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.27 X.X.16.4 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.28 X.X.16.5 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.29 X.X.16.15 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.30 X.X.16.25 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.31 X.X.16.26 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.32 X.X.16.27 netmask 255.255.255.255 0 0
static (inside,dmz1) C.C.77.33 X.X.16.28 netmask 255.255.255.255 0 0
static (dmz1,outside) P.P.P.58 C.C.77.26 netmask 255.255.255.255 0 0
static (dmz1,outside) P.P.P.26 C.C.77.41 netmask 255.255.255.255 0 0
conduit permit tcp host P.P.P.24 eq

http://www any

conduit deny tcp host P.P.P.24 neq

http://www any

conduit permit tcp host P.P.P.33 eq

http://www any

conduit permit tcp host P.P.P.3 eq smtp any
conduit permit tcp host P.P.P.40 eq

http://www any

conduit permit tcp host P.P.P.27 eq 1494 any
conduit permit udp host P.P.P.27 eq 1604 any
conduit permit tcp host P.P.P.27 eq

http://www any

conduit permit tcp host P.P.P.28 eq 1494 any
conduit permit udp host P.P.P.28 eq 1604 any
conduit permit tcp host P.P.P.28 eq

http://www any

conduit permit tcp host P.P.P.17 eq ftp any
conduit permit tcp host P.P.P.20 eq ftp any
conduit permit tcp host P.P.P.21 eq ftp any
conduit permit tcp host P.P.P.29 eq 1494 any
conduit permit udp host P.P.P.29 eq 1604 any
conduit permit tcp host P.P.P.29 eq

http://www any

conduit permit tcp host P.P.P.41 eq 1494 any
conduit permit udp host P.P.P.41 eq 1604 any
conduit permit tcp host P.P.P.36 eq

http://www any

conduit permit tcp host X.X.16.62 eq

http://www any

conduit permit tcp host P.P.P.36 eq 3389 any
conduit permit tcp host P.P.P.37 eq 3389 any
conduit permit tcp host P.P.P.38 eq 3389 any
conduit permit tcp host P.P.P.38 eq ftp any
conduit permit tcp host P.P.P.37 eq ftp any
conduit permit tcp host P.P.P.36 eq ftp any
conduit permit tcp host P.P.P.42 eq

http://www any

conduit permit tcp host P.P.P.42 eq 443 any
conduit permit udp host C.C.77.14 eq domain any
conduit permit udp host C.C.77.15 eq domain any
conduit permit tcp host P.P.P.43 eq

http://www any

conduit permit tcp host P.P.P.43 eq 443 any
conduit permit tcp host C.C.77.11 eq 1433 any
conduit permit tcp host C.C.77.18 eq 1494 any
conduit permit tcp host C.C.77.19 eq 1494 any
conduit permit tcp host C.C.77.20 eq 1494 any
conduit permit tcp host C.C.77.21 eq 1494 any
conduit permit tcp host C.C.77.22 eq 1494 any
conduit permit tcp host P.P.P.79 eq

http://www any

conduit permit tcp host P.P.P.79 eq 1494 any
conduit permit tcp host P.P.P.44 eq 1494 any
conduit permit tcp host P.P.P.44 eq

http://www any

conduit permit tcp host P.P.P.45 eq 1494 any
conduit permit tcp host P.P.P.46 eq 1494 any
conduit permit tcp host P.P.P.47 eq 1494 any
conduit permit tcp host P.P.P.48 eq 1494 any
conduit permit tcp host P.P.P.49 eq 1494 any
conduit permit tcp host P.P.P.50 eq 1494 any
conduit permit tcp host P.P.P.51 eq 1494 any
conduit permit tcp host P.P.P.52 eq 1494 any
conduit permit tcp host P.P.P.53 eq 1494 any
conduit permit tcp host P.P.P.54 eq 1494 any
conduit permit tcp host P.P.P.55 eq 1494 any
conduit permit tcp host P.P.P.45 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.46 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.47 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.48 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.49 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.50 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.52 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.53 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.54 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.55 eq

http://www host

P.P.P.56
conduit permit tcp host P.P.P.51 eq

http://www host

P.P.P.56
conduit permit tcp host C.C.77.23 eq 6103 host C.C.77.12
conduit permit tcp host P.P.P.26 eq

http://www any

conduit permit tcp host C.C.77.27 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.28 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.29 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.30 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.31 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.32 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.33 eq

http://www host

C.C.77.26
conduit permit tcp host C.C.77.27 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.28 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.29 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.30 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.31 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.32 eq 1494 host C.C.77.26
conduit permit tcp host C.C.77.33 eq 1494 host C.C.77.26
conduit permit tcp host P.P.P.58 eq

http://www any

conduit permit tcp host C.C.77.27 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.28 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.29 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.30 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.31 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.32 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.33 eq

http://www host

C.C.77.41
conduit permit tcp host C.C.77.27 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.28 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.29 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.30 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.31 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.32 eq 1494 host C.C.77.41
conduit permit tcp host C.C.77.33 eq 1494 host C.C.77.41
outbound 11 deny T.T.1.99 255.255.255.255 0 tcp
outbound 11 deny X.X.11.55 255.255.255.255 0 tcp
outbound 11 deny T.T.1.66 255.255.255.255 0 tcp
outbound 11 deny X.X.23.189 255.255.255.255 0 tcp
outbound 11 deny X.X.12.245 255.255.255.255 0 tcp
outbound 11 deny T.T.3.2 255.255.255.255 0 tcp
outbound 11 deny T.T.3.3 255.255.255.255 0 tcp
outbound 11 deny T.T.0.195 255.255.255.255 0 tcp
outbound 11 deny T.T.2.3 255.255.255.255 0 tcp
outbound 11 deny T.T.2.130 255.255.255.255 0 tcp
outbound 11 deny T.T.2.66 255.255.255.255 0 tcp
outbound 11 deny T.T.3.66 255.255.255.255 0 tcp
outbound 11 deny T.T.2.98 255.255.255.255 0 tcp
outbound 11 deny T.T.3.34 255.255.255.255 0 tcp
outbound 11 deny T.T.0.130 255.255.255.255 0 tcp
outbound 11 deny T.T.1.162 255.255.255.255 0 tcp
outbound 11 deny T.T.0.226 255.255.255.255 0 tcp
outbound 11 deny T.T.2.194 255.255.255.255 0 tcp
outbound 11 deny T.T.3.99 255.255.255.255 0 tcp
outbound 11 deny T.T.2.226 255.255.255.255 0 tcp
outbound 11 deny T.T.1.197 255.255.255.255 0 tcp
outbound 11 deny T.T.1.195 255.255.255.255 0 tcp
outbound 11 deny T.T.1.34 255.255.255.255 0 tcp
outbound 11 deny X.X.23.175 255.255.255.255 0 tcp
outbound 11 deny X.X.24.89 255.255.255.255 0 tcp
outbound 11 deny X.X.23.77 255.255.255.255 0 tcp
outbound 11 deny T.T.2.163 255.255.255.255 0 tcp
outbound 12 deny 208.184.216.223 255.255.255.0 0 tcp
outbound 12 deny 199.172.158.96 255.255.255.0 0 tcp
outbound 12 deny 199.172.158.98 255.255.255.0 0 tcp
outbound 12 deny 199.172.158.95 255.255.255.0 0 tcp
apply (inside) 11 outgoing_src
apply (inside) 12 outgoing_dest
route outside 0.0.0.0 0.0.0.0 P.P.P.1 1
route inside 10.0.0.0 255.0.0.0 X.X.100.10 1
route inside 129.176.170.0 255.255.255.0 X.X.95.14 1
route inside B.B.0.0 255.255.0.0 Y.Y.0.101 1
route inside A.A.0.0 255.255.0.0 Y.Y.1.1 1
route inside Z.Z.0.0 255.255.0.0 Y.Y.1.1 1
route inside Y.Y.0.0 255.255.0.0 X.X.100.10 1
route inside 172.31.255.136 255.255.255.252 X.X.100.27 1
route inside 172.31.255.152 255.255.255.252 X.X.100.27 1
route inside C.C.1.0 255.255.255.0 X.X.100.10 1
route inside C.C.10.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.11.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.12.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.13.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.15.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.16.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.17.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.18.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.20.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.21.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.22.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.23.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.24.0 255.255.255.0 Y.Y.1.1 1
route inside C.C.25.0 255.255.255.0 Y.Y.1.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
http server enable
http Y.Y.0.0 255.255.0.0 inside
http B.B.0.0 255.255.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server community ******
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
no sysopt route dnat
crypto ipsec transform-set **** esp-3des esp-md5-hmac
crypto dynamic-map dynmap 30 set transform-set myset
crypto map ********** 10 ipsec-isakmp
crypto map ********** 10 match address 105
crypto map ********** 10 set peer H.H.244.23
crypto map ********** 10 set transform-set myset
crypto map ********** 20 ipsec-isakmp dynamic dynmap
crypto map ********** interface outside
isakmp enable outside
isakmp key ******** address H.H.244.23 netmask 255.255.255.255
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption 3des
isakmp policy 10 hash md5
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
vpngroup vpn3000 address-pool quadpool
vpngroup vpn3000 dns-server Y.Y.16.100
vpngroup vpn3000 wins-server Y.Y.16.100
vpngroup vpn3000 default-domain wihri.org
vpngroup vpn3000 split-tunnel 101
vpngroup vpn3000 idle-time 1800
vpngroup vpn3000 password ********
telnet timeout 60
ssh timeout 60
terminal width 80

 

[yizhar]

HI.

> global (dmz1) 1 C.C.77.200-C.C.77.250 ...
This is probably the problem. You are using NAT here, not PAT, and the ip range overflows.

First, remove that line:
no global (dmz1) 1 C.C.77.200-C.C.77.250

And then, try one of the following:

Option A, PAT only:
global (dmz1) 1 C.C.77.200

Option B, NAT+PAT:
global (dmz1) 1 C.C.77.200
global (dmz1) 1 C.C.77.201-C.C.77.250

You will need to "clear xlate" again in the process.

Bye
Yizhar Hurwitz

http://come.to/yizhar

http://teachers.sivan.co.il/yizhar

 

[wampa]

Yizhar:

Thanks! I made these changes this morning, adn I'll see how things go during the day today.