[Swan] Poor OpenSwan IPsec Performance
dave at ariens.ca
dave at ariens.ca
Thu Aug 15 06:03:53 EEST 2013
[Originally posted to users at lists.openswan.org]
Hey there, to add a few extra details:
Version: openswan 2.6.39-2
CPU: Dual Core Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz
I'm fairly sure we're not looking at a CPU bottleneck and additional
pondering has me looking at MTU size and packet fragmentation... I've
attempted to force the Openswan server to send the fragmentation
requirement with fragicmp=yes, and ensured that those packets were
allowed through the firewall (-A INPUT -p icmp --icmp-type
fragmentation-needed -j ACCEPT) all to no benefit. I've set the MTU
size on the interface higher/lower, also to no avail.
I'm excited to see Libreswan get off the group and look forward to
migrating to the next release.
Original Mail:
Hi,
I have 2 VPS servers running OpenSwan that have tunnels between
themselves and a tunnel to a Juniper SRX firewall on my home network.
The VPS servers both have 100Mbit/s Internet connections (real-world
throughput, both up and down, is excellent). My home network has a
30Mbit/s cable broadband connection (also excellent).
I have a 1.6GB test file that I'm copying around (both from VPS1 <->
VPS2, and VPS1/2 -> home) and I cannot get higher than ~ 1.5Mbit/s
transer speeds going over the tunnel whereas non-encrypted transfers are
what you would expect: ~95% of connection capabilities.
I've read some search results that indicated that the encryption
algorithms in play can impact throughput, but I don't suspect they would
be reducing my transfer speeds by > 90%. CPU load on both VPS servers
was extremely low during all tests.
Here's a snippet of the tunnel properties, any and all help would be
very appreciated!
# ipsec auto --status
000 using kernel interface: netkey
000 interface lo/lo ::1
000 interface lo/lo 127.0.0.1
000 interface lo/lo 127.0.0.1
000 interface eth0/eth0 1.1.1.1
000 interface eth0/eth0 1.1.1.1
000 interface eth0/eth0 192.168.100.10
000 interface eth0/eth0 192.168.100.10
000 %myid = (none)
000 debug none
000
000 virtual_private (%priv):
000 - allowed 6 subnets: 10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12,
25.0.0.0/8, fd00::/8, fe80::/10
000 - disallowed 1 subnet: 192.168.100.0/24
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=6, name=ESP_CAST, ivlen=8, keysizemin=40,
keysizemax=128
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=13, name=ESP_AES_CTR, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=14, name=ESP_AES_CCM_A, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=15, name=ESP_AES_CCM_B, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=16, name=ESP_AES_CCM_C, ivlen=8,
keysizemin=128, keysizemax=256
000 algorithm ESP encrypt: id=18, name=ESP_AES_GCM_A, ivlen=8,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=19, name=ESP_AES_GCM_B, ivlen=12,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=20, name=ESP_AES_GCM_C, ivlen=16,
keysizemin=160, keysizemax=288
000 algorithm ESP encrypt: id=22, name=ESP_CAMELLIA, 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=6, name=AUTH_ALGORITHM_HMAC_SHA2_384,
keysizemin=384, keysizemax=384
000 algorithm ESP auth attr: id=7, name=AUTH_ALGORITHM_HMAC_SHA2_512,
keysizemin=512, keysizemax=512
000 algorithm ESP auth attr: id=8, name=AUTH_ALGORITHM_HMAC_RIPEMD,
keysizemin=160, keysizemax=160
000 algorithm ESP auth attr: id=9, name=AUTH_ALGORITHM_AES_CBC,
keysizemin=128, keysizemax=128
000 algorithm ESP auth attr: id=251, name=AUTH_ALGORITHM_NULL_KAME,
keysizemin=0, keysizemax=0
000
000 algorithm IKE encrypt: id=0, name=(null), blocksize=16,
keydeflen=131
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 hash: id=4, name=OAKLEY_SHA2_256, hashsize=32
000 algorithm IKE hash: id=6, name=OAKLEY_SHA2_512, hashsize=64
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 algorithm IKE dh group: id=22, name=OAKLEY_GROUP_DH22, bits=1024
000 algorithm IKE dh group: id=23, name=OAKLEY_GROUP_DH23, bits=2048
000 algorithm IKE dh group: id=24, name=OAKLEY_GROUP_DH24, bits=2048
000
000 stats db_ops: {curr_cnt, total_cnt, maxsz} :context={0,0,0}
trans={0,0,0} attrs={0,0,0}
000
000 "home.domain.ca":
0.0.0.0/0===1.1.1.1<1.1.1.1>...1.1.1.3<1.1.1.3>===10.0.0.0/8; erouted;
eroute owner: #9
000 "home.domain.ca": myip=192.168.100.10; hisip=unset;
000 "home.domain.ca": ike_life: 3600s; ipsec_life: 28800s;
rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 0
000 "home.domain.ca": policy:
PSK+ENCRYPT+TUNNEL+PFS+UP+IKEv2ALLOW+SAREFTRACK+lKOD+rKOD; prio: 0,8;
interface: eth0;
000 "home.domain.ca": newest ISAKMP SA: #5; newest IPsec SA: #9;
000 "home.domain.ca": IKE algorithm newest: 3DES_CBC_192-SHA1-MODP1024
000 "vps2":
168.100.10/32===1.1.1.1<1.1.1.1>...1.1.1.2<1.1.1.2>===192.168.200.10/32;
erouted; eroute owner: #11
000 "vps2": myip=192.168.100.10; hisip=unset;
000 "vps2": ike_life: 3600s; ipsec_life: 28800s; rekey_margin: 540s;
rekey_fuzz: 100%; keyingtries: 0
000 "vps2": policy:
PSK+ENCRYPT+TUNNEL+PFS+UP+IKEv2ALLOW+SAREFTRACK+lKOD+rKOD; prio: 32,32;
interface: eth0;
000 "vps2": newest ISAKMP SA: #10; newest IPsec SA: #11;
000 "vps2": IKE algorithm newest: AES_CBC_128-SHA1-MODP2048
000
000 #9: "home.domain.ca":500 STATE_QUICK_R2 (IPsec SA established);
EVENT_SA_REPLACE in 27417s; newest IPSEC; eroute owner; isakmp#1; idle;
import:admin initiate
000 #9: "home.domain.ca" esp.6bdbad6 at 1.1.1.3 esp.f7dad11f at 1.1.1.1
tun.0 at 1.1.1.3 tun.0 at 1.1.1.1 ref=0 refhim=4294901761
000 #1: "home.domain.ca":500 STATE_MAIN_I4 (ISAKMP SA established);
EVENT_SA_REPLACE in 1497s; lastdpd=880s(seq in:0 out:0); idle;
import:admin initiate
000 #5: "home.domain.ca":500 STATE_MAIN_R3 (sent MR3, ISAKMP SA
established); EVENT_SA_REPLACE in 2160s; newest ISAKMP; lastdpd=-1s(seq
in:0 out:0); idle; import:not set
000 #11: "vps2":500 STATE_QUICK_R2 (IPsec SA established);
EVENT_SA_REPLACE in 27577s; newest IPSEC; eroute owner; isakmp#10; idle;
import:not set
000 #11: "vps2" esp.7e679ad6 at 1.1.1.2 esp.9c1dfcbe at 1.1.1.1 tun.0 at 1.1.1.2
tun.0 at 1.1.1.1 ref=0 refhim=4294901761
000 #10: "vps2":500 STATE_MAIN_R3 (sent MR3, ISAKMP SA established);
EVENT_SA_REPLACE in 2377s; newest ISAKMP; lastdpd=-1s(seq in:0 out:0);
idle; import:not set
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