[Openswan Users] Connected to gateway but cannot ping or telnet the internal lan
chr1x2
caforonda at gmail.com
Thu Mar 11 01:32:40 EST 2010
Thanks Bob for replying.
Yes I thought so it's firewall issue. I already tried to put the firewall
down and still no luck.
I also tried to define the forwarding on iptables. I don't know if this is
correct or I'm just missing something.
iptables -A FORWARD -s 0/0 -i eth0 -d 192.168.0.21 -p TCP --sport
> 1024:65535 -m multiport --dports 7777 -j ACCEPT
>
iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 7777 --sport
> 1024:65535 -j DNAT --to 192.168.0.21:7777
>
Tthanks,
chr1x2
On Thu, Mar 11, 2010 at 13:30, Bob Miller <bob at computerisms.ca> wrote:
> Since your tunnel is up but the ping packets don't seem to be going in
> the tunnel, I would guess your firewall needs some tweaking. There are
> several examples on the net of how to mark your packets using iptables
> for use with openswan.
> but it's just a guess...
>
>
>
> On Thu, 2010-03-11 at 11:33 +0800, chr1x2 wrote:
> > Hi All,
> >
> > I'm a bit new with Openswan and I'm trying to setup a IPSec/VPN tunnel
> > connection and I need help. I already asked Google about it but I
> > cannot seem find the solution.
> >
> > Here's the problem. I can connect to the gateway but I cannot ping,
> > telnet or make any other connection on the internal lan. Thus making
> > the tunnel connection useless.
> >
> > Please see my configuration below.
> >
> > ipsec.conf
> >
> > version 2.0
> >
> > config setup
> > plutostderrlog="/var/log/ipsec.log"
> > plutoopts="--perpeerlog"
> >
> >
> > conn L2TP-PSK
> > authby=secret
> > pfs=no
> > rekey=no
> > keyingtries=3
> > left=%defaultroute
> > leftnexthop=192.168.0.1
> > leftprotoport=17/1701
> > right=%any
> > rightprotoport=17/%any
> > auto=add
> >
> > include /etc/ipsec.d/examples/no_oe.conf
> >
> >
> > # setkey -DP
> > 172.16.0.156[1701] 192.168.0.41[1701] udp
> > in ipsec
> > esp/transport//unique#16397
> > created: Mar 11 10:49:29 2010 lastused: Mar 11
> > 11:12:29 2010
> > lifetime: 0(s) validtime: 0(s)
> > spid=992 seq=7 pid=22104
> > refcnt=2
> > 192.168.0.41[1701] 172.16.0.156[1701] udp
> > out ipsec
> > esp/transport//unique#16397
> > created: Mar 11 10:49:29 2010 lastused: Mar 11
> > 11:12:29 2010
> > lifetime: 0(s) validtime: 0(s)
> > spid=1001 seq=6 pid=22104
> > refcnt=2
> > ::/0[any] ::/0[any] any
> > in none
> > created: Mar 11 10:35:43 2010
> > lastused:
> > lifetime: 0(s) validtime: 0(s)
> > spid=947 seq=5 pid=22104
> > refcnt=1
> > 0.0.0.0/0[any] 0.0.0.0/0[any] any
> > in none
> > created: Mar 11 10:35:43 2010
> > lastused:
> > lifetime: 0(s) validtime: 0(s)
> > spid=931 seq=4 pid=22104
> > refcnt=1
> > 0.0.0.0/0[any] 0.0.0.0/0[any] any
> > in none
> > created: Mar 11 10:35:43 2010 lastused: Mar 11
> > 10:49:29 2010
> > lifetime: 0(s) validtime: 0(s)
> > spid=915 seq=3 pid=22104
> > refcnt=1
> > ::/0[any] ::/0[any] any
> > out none
> > created: Mar 11 10:35:43 2010
> > lastused:
> > lifetime: 0(s) validtime: 0(s)
> > spid=956 seq=2 pid=22104
> > refcnt=1
> > 0.0.0.0/0[any] 0.0.0.0/0[any] any
> > out none
> > created: Mar 11 10:35:43 2010
> > lastused:
> > lifetime: 0(s) validtime: 0(s)
> > spid=940 seq=1 pid=22104
> > refcnt=1
> > 0.0.0.0/0[any] 0.0.0.0/0[any] any
> > out none
> > created: Mar 11 10:35:43 2010 lastused: Mar 11
> > 10:49:29 2010
> > lifetime: 0(s) validtime: 0(s)
> > spid=924 seq=0 pid=22104
> > refcnt=1
> >
> >
> > # ipsec auto --status
> > 000 interface lo/lo ::1
> > 000 interface lo/lo 127.0.0.1
> > 000 interface eth0/eth0 192.168.164.41
> > 000 %myid = (none)
> > 000 debug none
> > 000
> > 000 algorithm ESP encrypt: id=2, name=ESP_DES, ivlen=8,
> > keysizemin=64, keysizemax=64
> > 000 algorithm ESP encrypt: id=3, name=ESP_3DES, ivlen=8,
> > keysizemin=192, keysizemax=192
> > 000 algorithm ESP encrypt: id=7, name=ESP_BLOWFISH, ivlen=8,
> > keysizemin=40, keysizemax=448
> > 000 algorithm ESP encrypt: id=11, name=ESP_NULL, ivlen=0,
> > keysizemin=0, keysizemax=0
> > 000 algorithm ESP encrypt: id=12, name=ESP_AES, ivlen=8,
> > keysizemin=128, keysizemax=256
> > 000 algorithm ESP encrypt: id=252, name=ESP_SERPENT, ivlen=8,
> > keysizemin=128, keysizemax=256
> > 000 algorithm ESP encrypt: id=253, name=ESP_TWOFISH, ivlen=8,
> > keysizemin=128, keysizemax=256
> > 000 algorithm ESP auth attr: id=1,
> > name=AUTH_ALGORITHM_HMAC_MD5, keysizemin=128, keysizemax=128
> > 000 algorithm ESP auth attr: id=2,
> > name=AUTH_ALGORITHM_HMAC_SHA1, keysizemin=160, keysizemax=160
> > 000 algorithm ESP auth attr: id=5,
> > name=AUTH_ALGORITHM_HMAC_SHA2_256, keysizemin=256,
> > keysizemax=256
> > 000 algorithm ESP auth attr: id=251, name=(null),
> > keysizemin=0, keysizemax=0
> > 000
> > 000 algorithm IKE encrypt: id=5, name=OAKLEY_3DES_CBC,
> > blocksize=8, keydeflen=192
> > 000 algorithm IKE encrypt: id=7, name=OAKLEY_AES_CBC,
> > blocksize=16, keydeflen=128
> > 000 algorithm IKE hash: id=1, name=OAKLEY_MD5, hashsize=16
> > 000 algorithm IKE hash: id=2, name=OAKLEY_SHA1, hashsize=20
> > 000 algorithm IKE dh group: id=2, name=OAKLEY_GROUP_MODP1024,
> > bits=1024
> > 000 algorithm IKE dh group: id=5, name=OAKLEY_GROUP_MODP1536,
> > bits=1536
> > 000 algorithm IKE dh group: id=14, name=OAKLEY_GROUP_MODP2048,
> > bits=2048
> > 000 algorithm IKE dh group: id=15, name=OAKLEY_GROUP_MODP3072,
> > bits=3072
> > 000 algorithm IKE dh group: id=16, name=OAKLEY_GROUP_MODP4096,
> > bits=4096
> > 000 algorithm IKE dh group: id=17, name=OAKLEY_GROUP_MODP6144,
> > bits=6144
> > 000 algorithm IKE dh group: id=18, name=OAKLEY_GROUP_MODP8192,
> > bits=8192
> > 000
> > 000 stats db_ops.c: {curr_cnt, total_cnt,
> > maxsz} :context={0,0,0} trans={0,0,0} attrs={0,0,0}
> > 000
> > 000 "L2TP-PSK": 192.168.0.41:17/1701---192.168.0.1...%any:17/%
> > any; unrouted; eroute owner: #0
> > 000 "L2TP-PSK": srcip=unset; dstip=unset; srcup=ipsec
> > _updown; dstup=ipsec _updown;
> > 000 "L2TP-PSK": ike_life: 3600s; ipsec_life: 28800s;
> > rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 3
> > 000 "L2TP-PSK": policy: PSK+ENCRYPT+TUNNEL+DONTREKEY; prio:
> > 32,32; interface: eth0; encap: esp;
> > 000 "L2TP-PSK": newest ISAKMP SA: #0; newest IPsec SA: #0;
> > 000 "L2TP-PSK"[3]:
> > 192.168.0.41:17/1701---192.168.0.1...172.16.0.156:17/1701;
> > erouted; eroute owner: #6
> > 000 "L2TP-PSK"[3]: srcip=unset; dstip=unset; srcup=ipsec
> > _updown; dstup=ipsec _updown;
> > 000 "L2TP-PSK"[3]: ike_life: 3600s; ipsec_life: 28800s;
> > rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 3
> > 000 "L2TP-PSK"[3]: policy: PSK+ENCRYPT+TUNNEL+DONTREKEY;
> > prio: 32,32; interface: eth0; encap: esp;
> > 000 "L2TP-PSK"[3]: newest ISAKMP SA: #5; newest IPsec SA:
> > #6;
> > 000 "L2TP-PSK"[3]: IKE algorithm newest:
> > 3DES_CBC_192-SHA1-MODP2048
> > 000
> > 000 #6: "L2TP-PSK"[3] 172.16.0.156:500 STATE_QUICK_R2 (IPsec
> > SA established); EVENT_SA_EXPIRE in 1967s; newest IPSEC;
> > eroute owner
> > 000 #6: "L2TP-PSK"[3] 172.16.0.156 esp.a6aa4532 at 172.16.0.156
> > esp.41471b19 at 192.168.0.41
> > 000 #5: "L2TP-PSK"[3] 172.16.0.156:500 STATE_MAIN_R3 (sent
> > MR3, ISAKMP SA established); EVENT_SA_EXPIRE in 27167s; newest
> > ISAKMP; nodpd
> > 000
> >
> > route -n
> > Kernel IP routing table
> > Destination Gateway Genmask Flags Metric
> > Ref Use Iface
> > 172.16.0.156 192.168.0.1 255.255.255.255 UGH 0 0
> > 0 eth0
> > 10.0.1.2 0.0.0.0 255.255.255.255 UH 0 0
> > 0 ppp0
> > 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0
> > 0 eth0
> > 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0
> > 0 eth0
> > 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0
> > 0 eth0
> >
> > # tcpdump -i ppp0
> > 11:25:58.314939 IP 192.168.0.240.1082 > 192.168.0.21.8888: S
> > 2675286046:2675286046(0) win 64240 <mss 1360,nop,nop,sackOK>
> > 11:26:01.317168 IP 192.168.0.240.1082 > 192.168.0.21.8888: S
> > 2675286046:2675286046(0) win 64240 <mss 1360,nop,nop,sackOK>
> > 11:26:07.326024 IP 192.168.0.240.1082 > 192.168.0.21.8888: S
> > 2675286046:2675286046(0) win 64240 <mss 1360,nop,nop,sackOK>
> > 11:26:22.864028 IP 192.168.0.240 > 192.168.0.21: icmp 40: echo
> > request seq 2304
> > 11:26:28.088071 IP 192.168.0.240 > 192.168.0.21: icmp 40: echo
> > request seq 2560
> > 11:26:33.097248 IP 192.168.0.240 > 192.168.0.21: icmp 40: echo
> > request seq 2816
> >
> > l2tpd.conf
> > [lns default]
> > ip range = 192.168.0.240-192.168.0.250
> > local ip = 192.168.0.41
> > require chap = yes
> > refuse pap = yes
> > require authentication = yes
> > name = ipsec
> > ppp debug = yes
> > pppoptfile = /etc/ppp/options.l2tpd
> > length bit = yes
> >
> >
> > Any help would be appreciated.
> >
> >
> > Thanks,
> > chr1x2
> > _______________________________________________
> > Users at openswan.org
> > http://lists.openswan.org/mailman/listinfo/users
> > Building and Integrating Virtual Private Networks with Openswan:
> > http://www.amazon.com/gp/product/1904811256/104-3099591-2946327?n=283155
> Bob Miller
> 334-7117/633-3760
> http://computerisms.ca
> bob at computerisms.ca
> Network, Internet, Server,
> and Open Source Solutions
>
>
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