How do I open pix 501 ports?

mathelize

Hello, I'd like to open pix 501 ports to allow traffic from the internet to terminate on Windows server 2008 used as a VPN server. The pix is functioning already as a remote access vpn server and it's working fine. I wonder if I could use the win2k8 server as a site to site vpn server and the pix still sitting in front as a firewall.
Any help will be very much appreciated.
Thanks!

john-cisco

You could, but have to allow it.

What access-list are on the pix?
Do a "sh access-group" to see
Then check those access-lists "sh access-list" based on the interface it is applied. ACL on a pix is applied INBOUND only.

What VPN traffic do you want to allow?
Is the server being accessed from a live internet IP? Is that IP natted as a static on the pix, check with sh static.

hth

MentholMoose

Why not use the PIX for the site to site VPN? Even if the other side isn't a PIX, it should still be possible to get working... I've done various combinations with no problems, such as PIX to Netscreen, ASA, and Sonicwall. The 501 is pretty weak though, so with stronger encryption you may get as low as 1MB/sec VPN throughput.

Anyway to set up a forwarded port, you have to modify your ACL assigned to the outside interface to allow the port, then setup a static translation to map that port from the outside interface to the server. So a barebones config to forward 9999/tcp (assuming external IP is 172.16.0.50) to server 10.0.0.5 would be like this:

Create ACL:
access-list site_vpn_acl permit tcp any host 172.16.0.50 eq 9999

Assign ACL to outside interface:
access-group site_vpn_acl in interface outside

Create static translation:
static (inside,outside) tcp 172.16.0.50 9999 10.0.0.5 9999 netmask 255.255.255.255

mathelize

MentholMoose wrote: »

Why not use the PIX for the site to site VPN? Even if the other side isn't a PIX, it should still be possible to get working... I've done various combinations with no problems, such as PIX to Netscreen, ASA, and Sonicwall. The 501 is pretty weak though, so with stronger encryption you may get as low as 1MB/sec VPN throughput.

Anyway to set up a forwarded port, you have to modify your ACL assigned to the outside interface to allow the port, then setup a static translation to map that port from the outside interface to the server. So a barebones config to forward 9999/tcp (assuming external IP is 172.16.0.50) to server 10.0.0.5 would be like this:

Create ACL:
access-list site_vpn_acl permit tcp any host 172.16.0.50 eq 9999

Assign ACL to outside interface:
access-group site_vpn_acl in interface outside

Create static translation:
static (inside,outside) tcp 172.16.0.50 9999 10.0.0.5 9999 netmask 255.255.255.255

Thanks for your reply, so you mean I can use a pix 501 at one end and then maybe a windows server 2008 at the other end.

MentholMoose

mathelize wrote: »

Thanks for your reply, so you mean I can use a pix 501 at one end and then maybe a windows server 2008 at the other end.

I think it's probably possible, although I haven't done it. Search the net for a tutorial or configuration guide.

mathelize

john-cisco wrote: »

You could, but have to allow it.

What access-list are on the pix?
Do a "sh access-group" to see
Then check those access-lists "sh access-list" based on the interface it is applied. ACL on a pix is applied INBOUND only.

What VPN traffic do you want to allow?
Is the server being accessed from a live internet IP? Is that IP natted as a static on the pix, check with sh static.

hth

Firewall# sh access-list
access-list cached ACL log flows: total 0, denied 0 (deny-flow-max 256)
alert-interval 300
access-list inside_outbound_nat0_acl; 1 elements
access-list inside_outbound_nat0_acl line 1 permit ip any 192.168.1.192 255.255.255.224 (hitcnt=0)
access-list outside_cryptomap_dyn_20; 1 elements
access-list outside_cryptomap_dyn_20 line 1 permit ip any 192.168.1.192 255.255.255.224 (hitcnt=0)
Firewall# sh access-group
Firewall# sh run
: Saved
:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password dSNg1WnOGfn/OyHV encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname Firewall
domain-name mathelize.com
fixup protocol dns maximum-length 512
fixup protocol ft.p 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 t.f.t.p 69
names
access-list inside_outbound_nat0_acl permit ip any 192.168.1.192 255.255.255.224
access-list outside_cryptomap_dyn_20 permit ip any 192.168.1.192 255.255.255.224
pager lines 24
icmp permit any outside
icmp permit any inside
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside 192.168.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool VPN_POOL 192.168.1.201-192.168.1.209
pdm location 192.168.1.2 255.255.255.255 inside
pdm location 192.168.1.192 255.255.255.224 outside
pdm history enable
arp timeout 14400
global (outside) 10 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 10 0.0.0.0 0.0.0.0 0 0
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 sip-disconnect 0:02:00 sip-invite 0:03:00
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
aaa authentication enable console LOCAL
aaa authentication http console LOCAL
aaa authentication serial console LOCAL
aaa authentication ssh console LOCAL
aaa authentication telnet console LOCAL
aaa authorization command LOCAL
http server enable
http 0.0.0.0 0.0.0.0 outside
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-pptp
sysopt connection permit-l2tp
crypto ipsec transform-set TRANS_ESP_3DES_MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set TRANS_ESP_3DES_MD5 mode transport
crypto dynamic-map outside_dyn_map 20 match address outside_cryptomap_dyn_20
crypto dynamic-map outside_dyn_map 20 set transform-set TRANS_ESP_3DES_MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
isakmp enable outside
isakmp key ******** address 0.0.0.0 netmask 0.0.0.0
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption 3des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 outside
ssh 192.168.1.0 255.255.255.0 inside
ssh timeout 5
management-access outside
console timeout 0
vpdn group PPTP-VPDN-GROUP accept dialin pptp
vpdn group PPTP-VPDN-GROUP ppp authentication pap
vpdn group PPTP-VPDN-GROUP ppp authentication chap
vpdn group PPTP-VPDN-GROUP ppp authentication mschap
vpdn group PPTP-VPDN-GROUP client configuration address local VPN_POOL
vpdn group PPTP-VPDN-GROUP client configuration dns 4.2.2.1 208.67.222.222
vpdn group PPTP-VPDN-GROUP pptp echo 60
vpdn group PPTP-VPDN-GROUP client authentication local
vpdn username molaleye password *********
vpdn username sabidemi password *********
vpdn username dmalomo password *********
vpdn username dolaleye password *********
vpdn username yemisi password *********
vpdn enable outside
vpdn enable inside
dhcpd address 192.168.1.50-192.168.1.60 inside
dhcpd dns 208.67.222.222 4.2.2.1
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd domain mathelize.com
dhcpd enable inside
privilege show level 0 command version
privilege show level 0 command curpriv
privilege show level 3 command pdm
privilege show level 3 command blocks
privilege show level 3 command ssh
privilege configure level 3 command who
privilege show level 3 command isakmp
privilege show level 3 command ipsec
privilege show level 3 command vpdn
privilege show level 3 command local-host
privilege show level 3 command interface
privilege show level 3 command ip
privilege configure level 3 command ping
privilege show level 3 command uauth
privilege configure level 5 mode enable command configure
privilege show level 5 command running-config
privilege show level 5 command privilege
privilege show level 5 command clock
privilege show level 5 command ntp
privilege show level 5 mode configure command logging
privilege show level 5 command fragment
terminal width 80