Cisco IPSEC VPN Problem

Hi,

My IPSEC VPN tunnel between two pix's has gone down and after trying the normal reboots I attached a syslog to one end and got a ipsec isakmp phase 1 retransmit message cisco doesnt really explain the causes of this.

Does anyone have any ideas what this means ? or the causes ?

Thanks

Alex

Reply to
Alex
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post the pix=B4s configurations........

Reply to
Juan Carlos

Are you using preshared keys? Have you established that there is basic connectivity between the two pix's? I would reconfigure the keys on both end and clear the crypto.

Reply to
Ladybug

hi, sorry for the late reply heres my config's

PIX Version 6.3(5) interface ethernet0 auto interface ethernet1 100full nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password ****** encrypted passwd ************* encrypted hostname pixfirewall domain-name ciscopix.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 name 10.35.104.0 Welling access-list inside_outbound_nat0_acl permit ip 192.168.1.0

255.255.255.0 Welling 255.255.255.0 access-list outside_cryptomap_20 permit ip 192.168.1.0 255.255.255.0 Welling 255.255.255.0 pager lines 24 logging on logging trap debugging logging host inside 192.168.1.12 mtu outside 1500 mtu inside 1500 ip address outside a.a.a.a 255.255.255.248 ip address inside 192.168.1.1 255.255.255.0 ip audit info action alarm ip audit attack action alarm pdm location Welling 255.255.255.0 outside pdm location 192.168.1.12 255.255.255.255 inside pdm logging informational 100 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 route outside 0.0.0.0 0.0.0.0 a.a.a.a 1 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 192.168.1.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server community public no snmp-server enable traps floodguard enable sysopt connection permit-ipsec crypto ipsec transform-set ESP-3DES-MD5 esp-3des 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 b.b.b.b crypto map outside_map 20 set transform-set ESP-3DES-MD5 crypto map outside_map interface outside isakmp enable outside isakmp key ******** address b.b.b.b netmask 255.255.255.255 no-xauth no-config-mode isakmp nat-traversal 20 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 timeout 5 ssh timeout 5 console timeout 0 dhcpd address 192.168.1.2-192.168.1.129 inside dhcpd lease 3600 dhcpd ping_timeout 750 dhcpd auto_config outside dhcpd enable inside terminal width 80

the second pix

PIX Version 6.3(5) interface ethernet0 auto interface ethernet1 auto nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password """" encrypted passwd """""""" encrypted hostname pixfirewall domain-name ciscopix.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 no fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol tftp 69 names name 192.168.1.0 Eltham access-list inside_outbound_nat0_acl permit ip 10.35.104.0

255.255.255.0 Eltham 255.255.255.0 access-list inside_outbound_nat0_acl permit ip any 10.35.104.240 255.255.255.248 access-list outside_cryptomap_20 permit ip 10.35.104.0 255.255.255.0 Eltham 255.255.255.0 access-list outside_cryptomap_dyn_20 permit ip any 10.35.104.240 255.255.255.248 access-list outside_cryptomap_dyn_40 permit ip any 10.35.104.240 255.255.255.248 pager lines 24 mtu outside 1500 mtu inside 1500 ip address outside 192.168.0.254 255.255.255.0 ip address inside 10.35.104.100 255.255.255.0 ip audit info action alarm ip audit attack action alarm ip local pool REMOTE 10.35.104.240-10.35.104.245 pdm location 0.0.0.0 255.255.255.255 inside pdm location 0.0.0.0 255.255.255.0 inside pdm location 10.35.104.106 255.255.255.255 inside pdm location Eltham 255.255.255.0 outside pdm location 10.35.104.3 255.255.255.255 inside pdm location Emis 255.255.255.255 outside pdm location Emis-ftp1 255.255.255.255 outside pdm location Emis-ftp2 255.255.255.255 outside pdm location 10.35.104.240 255.255.255.248 outside pdm logging informational 100 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 access-group outside_access_in in interface outside route outside 0.0.0.0 0.0.0.0 192.168.0.1 1 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 10.35.104.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server community public no snmp-server enable traps floodguard enable sysopt connection permit-ipsec crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac crypto dynamic-map outside_dyn_map 20 match address outside_cryptomap_dyn_20 crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5 crypto dynamic-map outside_dyn_map 40 match address outside_cryptomap_dyn_40 crypto dynamic-map outside_dyn_map 40 set transform-set ESP-3DES-MD5 crypto map outside_map 20 ipsec-isakmp crypto map outside_map 20 match address outside_cryptomap_20 crypto map outside_map 20 set peer a.a.a.a crypto map outside_map 20 set transform-set 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 a.a.a.a netmask 255.255.255.255 no-xauth no-config-mode isakmp nat-traversal 20 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 vpngroup MASON-REMOTE address-pool tmp vpngroup MASON-REMOTE dns-server 10.35.104.106 vpngroup MASON-REMOTE default-domain dh2.co.uk vpngroup MASON-REMOTE idle-time 1800 vpngroup MASON-REMOTE password ******** vpngroup eltham-remote address-pool REMOTE vpngroup eltham-remote dns-server 10.35.104.106 vpngroup eltham-remote idle-time 1800 vpngroup eltham-remote password ******** telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd address 10.35.104.107-10.35.104.254 inside dhcpd dns 10.35.104.106 dhcpd wins 10.35.104.106 dhcpd lease 3600 dhcpd ping_timeout 750 dhcpd domain dh2.co.uk dhcpd auto_config outside dhcpd enable inside terminal width 80

The second pix has some vpn clients connected to it which are connecting fine.

Many thanks

Alex

Reply to
Alex

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