DNS fails through site to site vpn with pix 501 and so does replicatio

[fs483]

Hello,

I'm having a little trouble with my pix to pix vpn with two servers that share the same domain. About six months ago, we decided to split two servers that were both DCs from the same domain. Up until yesterday, these two servers have been in contact between themselves. Yesterday, we created a pix to pix vpn with 2 Cisco 501s.

Site A
Pix : 192.168.1.88
IOS 6.3(4)

Site B
Pix : 192.168.0.88
IOS 6.2(3) I think...

Now my vpn functions partially. From either Sites, i'm able to access the other site's shares ONLY through it's IP. However, site A outlook clients are able to contact the exchange server at site by through it's hostname. Pings from either sites to the other doesn't work. I don't have any specific access-lists that would block anything. I also noticed replications haven't been working eventhough the vpn has been established. Where so I start looking. I guess the most immediate problem is to solve the DNS issues. I will post a config dump when I get a chance.

Thanks
akwong

 

[NetworkGuy101]

Try the No fixup protocol DNS

 

[LloydSev]

do you have a "sysopt connection permit-ipsec" line in your PIX configs?

Computer/Network Technician
CCNA

 

[NetworkGuy101]

Yes Good Point. If you could post part of your config that would better help.

 

[fs483]

Hello LloydSev,

Yup, I've got the "sysopt conneciton permit-ipsec" line. Here's the config of one of the pixes. The other will come later but it's basically identical except it uses PPPoE on a fixed IP and the IPs point to this pix obviously.

Thanks for your help.

Anthony

show config
: Saved
:
PIX Version 6.1(1)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password XXX encrypted
passwd XXX encrypted
hostname myHostname
domain-name myDomain.com
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
no fixup protocol smtp 25
names
name 192.168.1.0 cpHud
access-list in_access permit tcp any host aaa.xxx.xxx.138 eq 3389
access-list in_access permit tcp any host aaa.xxx.xxx.138 eq smtp
access-list in_access permit tcp any host aaa.xxx.xxx.138 eq www
access-list in_access permit tcp any host aaa.xxx.xxx.138 eq 1723
access-list in_access permit gre any host aaa.xxx.xxx.138
access-list outside_cryptomap_20 permit ip 192.168.0.0 255.255.255.0 cpHud 255.255.255.0
access-list inside_outbound_nat0_acl permit ip 192.168.0.0 255.255.255.0 cpHud 255.255.255.0
pager lines 24
logging on
logging buffered debugging
interface ethernet0 10baset
interface ethernet1 10full
mtu outside 1500
mtu inside 1500
ip address outside aaa.xxx.xxx.137 255.255.255.240
ip address inside 192.168.0.88 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
static (inside,outside) aaa.xxx.xxx.138 192.168.0.1 netmask 255.255.255.255 0 0
access-group in_access in interface outside
route outside 0.0.0.0 0.0.0.0 aaa.xxx.xxx.129 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 192.168.0.1 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
no floodguard enable
sysopt connection permit-ipsec
no sysopt route dnat
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto map outside_map 20 ipsec-isakmp
crypto map outside_map 20 match address outside_cryptomap_20
crypto map outside_map 20 set peer bbb.xxx.xxx.238
crypto map outside_map 20 set transform-set ESP-DES-MD5
crypto map outside_map interface outside
isakmp enable outside
isakmp key ******** address bbb.xxx.xxx.238 netmask 255.255.255.255 no-xauth no-config-mode
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption des
isakmp policy 20 hash md5
isakmp policy 20 group 1
isakmp policy 20 lifetime 86400
telnet 192.168.0.0 255.255.255.0 inside
telnet timeout 5
terminal width 80
Cryptochecksum:xxx
myHostname(config)#

 

[fs483]

Here's the config of the other site. This site has the fixed ip bbb.xxx.xxx.238.

Thanks.
Anthony

myHostname(config)# show config
: Saved
: Written by enable_15 at 07:14:29.473 UTC Thu Mar 17 2005
PIX Version 6.3(4)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password XXX encrypted
passwd XXX encrypted
hostname myHostname
domain-name myDoamin.com
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list outside_cryptomap_20 permit ip 192.168.1.0 255.255.255.0 192.168.0.0 255.255.255.0
access-list inside_outbound_nat0_acl permit ip 192.168.1.0 255.255.255.0 192.168.0.0 255.255.255.0
access-list in_access permit tcp any any eq 3389
pager lines 24
logging on
logging buffered debugging
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.1.88 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.1.88 255.255.255.255 inside
pdm location 192.168.1.1 255.255.255.255 inside
pdm location 192.168.0.0 255.255.255.0 outside
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
static (inside,outside) tcp interface 3389 192.168.1.1 3389 netmask 255.255.255.255 0 0
access-group in_access in interface outside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 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 TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http 192.168.1.1 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto map outside_map 20 ipsec-isakmp
crypto map outside_map 20 match address outside_cryptomap_20
crypto map outside_map 20 set peer aaa.xxx.xxx.137
crypto map outside_map 20 set transform-set ESP-DES-MD5
crypto map outside_map interface outside
isakmp enable outside
isakmp key ******** address aaa.xxx.xxx.137 netmask 255.255.255.255 no-xauth no-config-mode
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption des
isakmp policy 20 hash md5
isakmp policy 20 group 1
isakmp policy 20 lifetime 86400
telnet 192.168.1.1 255.255.255.255 inside
telnet timeout 5
ssh timeout 5
console timeout 0
vpdn group pppoe_group request dialout pppoe
vpdn group pppoe_group localname xxx@xxx.xxx
vpdn group pppoe_group ppp authentication pap
vpdn username xxx@xxx.xxx password ********
terminal width 80
Cryptochecksum:XXX
myHostname#