Broadband Connection Very Slow w/Pix 501

[Arky69]

We have a remote office that uses a PIX 501 to VPN to the main office. The remote office has a PPP0E DSL connection that is advertised as 3.0Mbps d/l and 384kbps u/l. With the PIX connected, speed tests at speakeasy.net show a consistantly slow download speed of around 350kbps and an upload speed approaching the advertised speed ~330kbps.

We use the Pix to authenticate our PPPOE connection, so I am unable to connect directly to the Westell DSL modem to test the speed w/o the Pix.

There are two workstations with a wired connection and a D-Link Wireless Access Point connected to the PIX for our laptop users to connect wirelessly.

Any suggestions would be greatly appreciated!

Here is my configuration:

:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 95J62ImZGD/wIe/t encrypted
passwd 2ZVRV0MFdJ9Kq1NP encrypted
hostname r-ecplc-pix
domain-name ecptech.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 ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol
fixup protocol skinny 2000
no fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list aclin permit icmp any any
access-list aclin permit ip any 65.192.220.0 255.255.255.128
access-list vpn permit ip 192.168.31.0 255.255.255.0 192.168.31.224 255.255.255.
248
access-list vpn permit ip 192.168.31.0 255.255.255.0 192.168.1.0 255.255.255.0
access-list toHOU permit ip 192.168.31.0 255.255.255.0 192.168.1.0 255.255.255.0

access-list dial permit ip 192.168.31.0 255.255.255.0 192.168.31
.248
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.31.1 255.255.255.0
ip audit name dropit attack action alarm drop reset
ip audit interface outside dropit
ip audit info action alarm
ip audit attack action alarm
ip local pool remotepool 192.168.31.224-192.168.31.231
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list vpn
nat (inside) 1 192.168.31.0 255.255.255.0 0 0
static (inside,outside) 65.69.13.180 192.168.31.20 netmask 255.255.255.255 0 0
access-group aclin in interface outside
timeout xlate 0:05:00
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
http server enable
http 192.168.31.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community security
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set cryptoset1 esp-3des esp-sha-hmac
crypto ipsec security-association lifetime seconds 36000
crypto dynamic-map cl3k 4 set transform-set cryptoset1
crypto dynamic-map cl3k 4 set security-association lifetime seconds 3600 kilobyt
es 4608000
crypto map partnermap 30 ipsec-isakmp
crypto map partnermap 30 match address toHOU
crypto map partnermap 30 set peer 65.183.46.30
crypto map partnermap 30 set transform-set cryptoset1
crypto map partnermap 65535 ipsec-isakmp dynamic cl3k
crypto map partnermap interface outside
isakmp enable outside
isakmp key ******** address 0.0.0.0 netmask 0.0.0.0
isakmp key ******** address 65.183.46.30 netmask 255.255.255.255 no-xauth
fig-mode
isakmp identity address
isakmp keepalive 30 10
isakmp nat-traversal 10
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 cl3k address-pool remotepool
vpngroup cl3k dns-server 192.168.31.20
vpngroup cl3k wins-server 192.168.31.20
vpngroup cl3k default-domain ecptech.com
vpngroup cl3k split-tunnel dial
vpngroup cl3k idle-time 3600
telnet 192.168.31.0 255.255.255.0 inside
telnet timeout 15
ssh 65.192.220.0 255.255.255.0 outside
ssh timeout 30
console timeout 0
vpdn group pppoex request dialout pppoe
vpdn group pppoex localname ecptechservicesi@bellsouth.net
vpdn group pppoex ppp authentication pap
vpdn username ecptechservicesi@bellsouth.net password *********
dhcpd address 192.168.31.51-192.168.31.80 inside
dhcpd dns 192.168.1.200
dhcpd wins 192.168.1.200
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
banner login ---------------------------------------
banner login - r-ecplc-pix -
banner login ---------------------------------------
Cryptochecksum:520dddbfc08d8a5852dad5a1a78b2ba2
: end
[OK]
r-ecplc-pix#

 

[normntwrk]

not sure if this will help but I found this for some DSL lines

users may find that setting their MTU (Maximum Transmission Unit) to the value of 1458 instead of 1500 increases the performance of their ADSL line. Anyone who uses IPSEC should subtract a further 16 from this giving an MTU of 1442.

Norm

 

[silentblue]

Norms right you need to find out from your isp what mtu you should use as i came a cross this with AOL there's is 1400.

Regards,
Darren.

 

[jntullis]

I am having the same problem. Please let me know if changing the MTU corrected the issue. Why would it have been working fine then suddenly need to be changed? Could the nic module be going bad?