<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>I attempted to specify the IP address explicitly as a command line argument, but it still fails to bind for some reason. Am I running into some permission issue? </div><div><br></div><div>~ # ifconfig<br></div><div>wancom0 Link encap:Ethernet HWaddr 00:08:25:A4:09:10 <br> inet addr:10.196.172.114 Bcast:10.196.255.255 Mask:255.255.128.0<br> inet6 addr: fe80::208:25ff:fea4:910/64 Scope:Link<br> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1<br> RX packets:3871219 errors:0 dropped:1079 overruns:0 frame:0<br> TX packets:35917 errors:0 dropped:0 overruns:0 carrier:0<br> collisions:0 txqueuelen:1000 <br> RX bytes:260061626 (248.0 MiB) TX bytes:7536742 (7.1 MiB)<br> Memory:f7580000-f75fffff </div><div><br></div><div>~ # /usr/local/libexec/ipsec/pluto --config /etc/ipsec.conf --nofork --stderrlog<br> --interface 10.196.172.114 --listen 10.196.172.114<br>May 26 19:21:26.049457: bind() will be filtered for 10.196.172.114</div><div>Pluto initialized<br>May 26 19:21:26.049752: NSS DB directory: sql:/etc/ipsec.d<br>May 26 19:21:26.049834: Initializing NSS<br>May 26 19:21:26.049846: Opening NSS database "sql:/etc/ipsec.d" read-only<br>May 26 19:21:26.129870: NSS initialized<br>May 26 19:21:26.129884: NSS crypto library initialized<br>May 26 19:21:26.129889: FIPS HMAC integrity support [disabled]<br>May 26 19:21:26.129971: libcap-ng support [enabled]<br>May 26 19:21:26.129982: Linux audit support [disabled]<br>May 26 19:21:26.129988: Starting Pluto (Libreswan Version 3.25 XFRM(netkey) FORK PTHREAD_SETSCHEDPRIO NSS (AVA copy) LIBCAP_NG) pid:13283<br>May 26 19:21:26.129994: core dump dir: /run/pluto<br>May 26 19:21:26.129999: secrets file: /etc/ipsec.secrets<br>May 26 19:21:26.130003: leak-detective disabled<br>May 26 19:21:26.130008: NSS crypto [enabled]<br>May 26 19:21:26.130011: XAUTH PAM support [disabled]<br>May 26 19:21:26.130058: NAT-Traversal support [enabled]<br>May 26 19:21:26.130077: Initializing libevent in pthreads mode: headers: 2.0.21-stable (2001500); library: 2.0.21-stable (2001500)<br>May 26 19:21:26.130193: Encryption algorithms:<br>May 26 19:21:26.130201: AES_CCM_16 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm aes_ccm_c)<br>May 26 19:21:26.130206: AES_CCM_12 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm_b)<br>May 26 19:21:26.130212: AES_CCM_8 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm_a)<br>May 26 19:21:26.130219: 3DES_CBC IKEv1: IKE ESP IKEv2: IKE ESP FIPS [*192] (3des)<br>May 26 19:21:26.130223: CAMELLIA_CTR IKEv1: ESP IKEv2: ESP {256,192,*128}<br>May 26 19:21:26.130227: CAMELLIA_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (camellia)<br>May 26 19:21:26.130231: AES_GCM_16 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm aes_gcm_c)<br>May 26 19:21:26.130236: AES_GCM_12 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm_b)<br>May 26 19:21:26.130239: AES_GCM_8 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm_a)<br>May 26 19:21:26.130245: AES_CTR IKEv1: IKE ESP IKEv2: IKE ESP FIPS {256,192,*128} (aesctr)<br>May 26 19:21:26.130249: AES_CBC IKEv1: IKE ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes)<br>May 26 19:21:26.130253: SERPENT_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (serpent)<br>May 26 19:21:26.130259: TWOFISH_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (twofish)<br>May 26 19:21:26.130263: TWOFISH_SSH IKEv1: IKE IKEv2: IKE ESP {256,192,*128} (twofish_cbc_ssh)<br>May 26 19:21:26.130267: CAST_CBC IKEv1: ESP IKEv2: ESP {*128} (cast)<br>May 26 19:21:26.130272: NULL_AUTH_AES_GMAC IKEv1: ESP IKEv2: ESP {256,192,*128} (aes_gmac)<br>May 26 19:21:26.130275: NULL IKEv1: ESP IKEv2: ESP []<br>May 26 19:21:26.130281: Hash algorithms:<br>May 26 19:21:26.130285: MD5 IKEv1: IKE IKEv2: <br>May 26 19:21:26.130289: SHA1 IKEv1: IKE IKEv2: FIPS (sha)<br>May 26 19:21:26.130292: SHA2_256 IKEv1: IKE IKEv2: FIPS (sha2 sha256)<br>May 26 19:21:26.130295: SHA2_384 IKEv1: IKE IKEv2: FIPS (sha384)<br>May 26 19:21:26.130299: SHA2_512 IKEv1: IKE IKEv2: FIPS (sha512)<br>May 26 19:21:26.130307: PRF algorithms:<br>May 26 19:21:26.130310: HMAC_MD5 IKEv1: IKE IKEv2: IKE (md5)<br>May 26 19:21:26.130314: HMAC_SHA1 IKEv1: IKE IKEv2: IKE FIPS (sha sha1)<br>May 26 19:21:26.130317: HMAC_SHA2_256 IKEv1: IKE IKEv2: IKE FIPS (sha2 sha256 sha2_256)<br>May 26 19:21:26.130321: HMAC_SHA2_384 IKEv1: IKE IKEv2: IKE FIPS (sha384 sha2_384)<br>May 26 19:21:26.130325: HMAC_SHA2_512 IKEv1: IKE IKEv2: IKE FIPS (sha512 sha2_512)<br>May 26 19:21:26.130328: AES_XCBC IKEv1: IKEv2: IKE FIPS (aes128_xcbc)<br>May 26 19:21:26.130338: Integrity algorithms:<br>May 26 19:21:26.130342: HMAC_MD5_96 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (md5 hmac_md5)<br>May 26 19:21:26.130346: HMAC_SHA1_96 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha sha1 sha1_96 hmac_sha1)<br>May 26 19:21:26.130350: HMAC_SHA2_512_256 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha512 sha2_512 hmac_sha2_512)<br>May 26 19:21:26.130354: HMAC_SHA2_384_192 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha384 sha2_384 hmac_sha2_384)<br>May 26 19:21:26.130358: HMAC_SHA2_256_128 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha2 sha256 sha2_256 hmac_sha2_256)<br>May 26 19:21:26.130363: AES_XCBC_96 IKEv1: ESP AH IKEv2: IKE ESP AH FIPS (aes_xcbc aes128_xcbc aes128_xcbc_96)<br>May 26 19:21:26.130366: AES_CMAC_96 IKEv1: ESP AH IKEv2: ESP AH FIPS (aes_cmac)<br>May 26 19:21:26.130370: NONE IKEv1: ESP IKEv2: ESP FIPS (null)<br>May 26 19:21:26.130379: DH algorithms:<br>May 26 19:21:26.130382: NONE IKEv1: IKEv2: IKE ESP AH (null dh0)<br>May 26 19:21:26.130386: MODP1024 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (dh2)<br>May 26 19:21:26.130389: MODP1536 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (dh5)<br>May 26 19:21:26.130393: MODP2048 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh14)<br>May 26 19:21:26.130396: MODP3072 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh15)<br>May 26 19:21:26.130400: MODP4096 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh16)<br>May 26 19:21:26.130403: MODP6144 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh17)<br>May 26 19:21:26.130407: MODP8192 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh18)<br>May 26 19:21:26.130411: DH19 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_256)<br>May 26 19:21:26.130414: DH20 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_384)<br>May 26 19:21:26.130418: DH21 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_521)<br>May 26 19:21:26.130422: DH23 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS<br>May 26 19:21:26.130425: DH24 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS<br>May 26 19:21:26.132693: starting up 7 crypto helpers<br>May 26 19:21:26.132724: started thread for crypto helper 0<br>May 26 19:21:26.132740: started thread for crypto helper 1<br>May 26 19:21:26.132744: seccomp security for crypto helper not supported<br>May 26 19:21:26.132756: started thread for crypto helper 2<br>May 26 19:21:26.132762: seccomp security for crypto helper not supported<br>May 26 19:21:26.132794: started thread for crypto helper 3<br>May 26 19:21:26.132796: seccomp security for crypto helper not supported<br>May 26 19:21:26.132814: started thread for crypto helper 4<br>May 26 19:21:26.132758: seccomp security for crypto helper not supported<br>May 26 19:21:26.133265: started thread for crypto helper 5<br>May 26 19:21:26.133267: seccomp security for crypto helper not supported<br>May 26 19:21:26.133292: started thread for crypto helper 6<br>May 26 19:21:26.133296: seccomp security for crypto helper not supported<br>May 26 19:21:26.133320: Using Linux XFRM/NETKEY IPsec interface code on 4.14.35<br>May 26 19:21:26.132829: seccomp security for crypto helper not supported<br>May 26 19:21:26.266276: seccomp security not supported<br>May 26 19:21:26.267538: added connection description "radius"<br>May 26 19:21:26.267588: listening for IKE messages<br>May 26 19:21:26.267609: FATAL ERROR: bind() failed in find_raw_ifaces4(). Errno 98: Address already in use<br>May 26 19:21:26.267619: "radius": deleting non-instance connection<br>connect(pluto_ctl) failed: No such file or directory<br>~ # <br><br></div><div>Thanks,</div><div>Balaji</div></div></div></div></div><br><div class="gmail_quote"><div class="gmail_attr" dir="ltr">On Tue, May 26, 2020 at 3:01 PM Balaji Thoguluva <<a href="mailto:tbbalaji@gmail.com">tbbalaji@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Thanks Paul.</div><div><br></div><div>Another question.</div><div><br></div><div>I have integrated Libreswan source code and its dependent binaries to my Linux based project. Please note that the Linux OS I have is not a full-blown OS but a stripped down version with limited features.</div><div><br></div><div>When I try to invoke pluto like this,</div><div><br></div><div>~ # /usr/local/libexec/ipsec/pluto --config /etc/ipsec.conf --nofork --stderrlog<br>Pluto initialized<br>May 26 18:22:44.640004: NSS DB directory: sql:/etc/ipsec.d<br>May 26 18:22:44.640085: Initializing NSS<br>May 26 18:22:44.640092: Opening NSS database "sql:/etc/ipsec.d" read-only<br>May 26 18:22:44.749626: NSS initialized<br>May 26 18:22:44.749643: NSS crypto library initialized<br>May 26 18:22:44.749649: FIPS HMAC integrity support [disabled]<br>May 26 18:22:44.749770: libcap-ng support [enabled]<br>May 26 18:22:44.749778: Linux audit support [disabled]<br>May 26 18:22:44.749786: Starting Pluto (Libreswan Version 3.25 XFRM(netkey) FORK PTHREAD_SETSCHEDPRIO NSS (AVA copy) LIBCAP_NG) pid:11445<br>May 26 18:22:44.749792: core dump dir: /run/pluto<br>May 26 18:22:44.749801: secrets file: /etc/ipsec.secrets<br>May 26 18:22:44.749808: leak-detective disabled<br>May 26 18:22:44.749814: NSS crypto [enabled]<br>May 26 18:22:44.749819: XAUTH PAM support [disabled]<br>May 26 18:22:44.749926: NAT-Traversal support [enabled]<br>May 26 18:22:44.749958: Initializing libevent in pthreads mode: headers: 2.0.21-stable (2001500); library: 2.0.21-stable (2001500)<br>May 26 18:22:44.750135: Encryption algorithms:<br>May 26 18:22:44.750148: AES_CCM_16 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm aes_ccm_c)<br>May 26 18:22:44.750156: AES_CCM_12 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm_b)<br>May 26 18:22:44.750164: AES_CCM_8 IKEv1: ESP IKEv2: ESP FIPS {256,192,*128} (aes_ccm_a)<br>May 26 18:22:44.750174: 3DES_CBC IKEv1: IKE ESP IKEv2: IKE ESP FIPS [*192] (3des)<br>May 26 18:22:44.750182: CAMELLIA_CTR IKEv1: ESP IKEv2: ESP {256,192,*128}<br>May 26 18:22:44.750190: CAMELLIA_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (camellia)<br>May 26 18:22:44.750198: AES_GCM_16 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm aes_gcm_c)<br>May 26 18:22:44.750206: AES_GCM_12 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm_b)<br>May 26 18:22:44.750213: AES_GCM_8 IKEv1: ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes_gcm_a)<br>May 26 18:22:44.750224: AES_CTR IKEv1: IKE ESP IKEv2: IKE ESP FIPS {256,192,*128} (aesctr)<br>May 26 18:22:44.750231: AES_CBC IKEv1: IKE ESP IKEv2: IKE ESP FIPS {256,192,*128} (aes)<br>May 26 18:22:44.750240: SERPENT_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (serpent)<br>May 26 18:22:44.750248: TWOFISH_CBC IKEv1: IKE ESP IKEv2: IKE ESP {256,192,*128} (twofish)<br>May 26 18:22:44.750255: TWOFISH_SSH IKEv1: IKE IKEv2: IKE ESP {256,192,*128} (twofish_cbc_ssh)<br>May 26 18:22:44.750262: CAST_CBC IKEv1: ESP IKEv2: ESP {*128} (cast)<br>May 26 18:22:44.750280: NULL_AUTH_AES_GMAC IKEv1: ESP IKEv2: ESP {256,192,*128} (aes_gmac)<br>May 26 18:22:44.750287: NULL IKEv1: ESP IKEv2: ESP []<br>May 26 18:22:44.750298: Hash algorithms:<br>May 26 18:22:44.750304: MD5 IKEv1: IKE IKEv2: <br>May 26 18:22:44.750311: SHA1 IKEv1: IKE IKEv2: FIPS (sha)<br>May 26 18:22:44.750325: SHA2_256 IKEv1: IKE IKEv2: FIPS (sha2 sha256)<br>May 26 18:22:44.750333: SHA2_384 IKEv1: IKE IKEv2: FIPS (sha384)<br>May 26 18:22:44.750340: SHA2_512 IKEv1: IKE IKEv2: FIPS (sha512)<br>May 26 18:22:44.750354: PRF algorithms:<br>May 26 18:22:44.750360: HMAC_MD5 IKEv1: IKE IKEv2: IKE (md5)<br>May 26 18:22:44.750369: HMAC_SHA1 IKEv1: IKE IKEv2: IKE FIPS (sha sha1)<br>May 26 18:22:44.750377: HMAC_SHA2_256 IKEv1: IKE IKEv2: IKE FIPS (sha2 sha256 sha2_256)<br>May 26 18:22:44.750383: HMAC_SHA2_384 IKEv1: IKE IKEv2: IKE FIPS (sha384 sha2_384)<br>May 26 18:22:44.750389: HMAC_SHA2_512 IKEv1: IKE IKEv2: IKE FIPS (sha512 sha2_512)<br>May 26 18:22:44.750396: AES_XCBC IKEv1: IKEv2: IKE FIPS (aes128_xcbc)<br>May 26 18:22:44.750411: Integrity algorithms:<br>May 26 18:22:44.750420: HMAC_MD5_96 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (md5 hmac_md5)<br>May 26 18:22:44.750426: HMAC_SHA1_96 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha sha1 sha1_96 hmac_sha1)<br>May 26 18:22:44.750432: HMAC_SHA2_512_256 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha512 sha2_512 hmac_sha2_512)<br>May 26 18:22:44.750439: HMAC_SHA2_384_192 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha384 sha2_384 hmac_sha2_384)<br>May 26 18:22:44.750447: HMAC_SHA2_256_128 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (sha2 sha256 sha2_256 hmac_sha2_256)<br>May 26 18:22:44.750453: AES_XCBC_96 IKEv1: ESP AH IKEv2: IKE ESP AH FIPS (aes_xcbc aes128_xcbc aes128_xcbc_96)<br>May 26 18:22:44.750460: AES_CMAC_96 IKEv1: ESP AH IKEv2: ESP AH FIPS (aes_cmac)<br>May 26 18:22:44.750466: NONE IKEv1: ESP IKEv2: ESP FIPS (null)<br>May 26 18:22:44.750491: DH algorithms:<br>May 26 18:22:44.750499: NONE IKEv1: IKEv2: IKE ESP AH (null dh0)<br>May 26 18:22:44.750506: MODP1024 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (dh2)<br>May 26 18:22:44.750513: MODP1536 IKEv1: IKE ESP AH IKEv2: IKE ESP AH (dh5)<br>May 26 18:22:44.750527: MODP2048 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh14)<br>May 26 18:22:44.750534: MODP3072 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh15)<br>May 26 18:22:44.750540: MODP4096 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh16)<br>May 26 18:22:44.750546: MODP6144 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh17)<br>May 26 18:22:44.750552: MODP8192 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS (dh18)<br>May 26 18:22:44.750559: DH19 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_256)<br>May 26 18:22:44.750566: DH20 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_384)<br>May 26 18:22:44.750574: DH21 IKEv1: IKE IKEv2: IKE ESP AH FIPS (ecp_521)<br>May 26 18:22:44.750579: DH23 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS<br>May 26 18:22:44.750586: DH24 IKEv1: IKE ESP AH IKEv2: IKE ESP AH FIPS<br>May 26 18:22:44.755598: starting up 7 crypto helpers<br>May 26 18:22:44.755652: started thread for crypto helper 0<br>May 26 18:22:44.755655: seccomp security for crypto helper not supported<br>May 26 18:22:44.755689: started thread for crypto helper 1<br>May 26 18:22:44.755704: seccomp security for crypto helper not supported<br>May 26 18:22:44.755721: started thread for crypto helper 2<br>May 26 18:22:44.755723: seccomp security for crypto helper not supported<br>May 26 18:22:44.755761: seccomp security for crypto helper not supported<br>May 26 18:22:44.755761: started thread for crypto helper 3<br>May 26 18:22:44.755798: started thread for crypto helper 4<br>May 26 18:22:44.755799: seccomp security for crypto helper not supported<br>May 26 18:22:44.755836: seccomp security for crypto helper not supported<br>May 26 18:22:44.755836: started thread for crypto helper 5<br>May 26 18:22:44.755884: started thread for crypto helper 6<br>May 26 18:22:44.755885: seccomp security for crypto helper not supported<br>May 26 18:22:44.755929: Using Linux XFRM/NETKEY IPsec interface code on 4.14.35<br>May 26 18:22:44.927272: seccomp security not supported<br>May 26 18:22:44.929155: added connection description "radius"<br>May 26 18:22:44.929200: listening for IKE messages<br>May 26 18:22:44.929229: FATAL ERROR: bind() failed in find_raw_ifaces4(). Errno 98: Address already in use<br>May 26 18:22:44.929240: "radius": deleting non-instance connection<br>connect(pluto_ctl) failed: No such file or directory<br>~ # <br><br></div><div>I have the following conf file at /etc/ipsec.d/radius.conf</div><div><br></div><div>conn radius<br> left=10.196.175.174<br> leftid=10.196.175.174<br> leftsubnet=<a href="http://10.196.175.174/32" target="_blank">10.196.175.174/32</a><br> right=10.196.172.114<br> rightid=10.196.172.114<br> rightsubnet=<a href="http://10.196.172.114/32" target="_blank">10.196.172.114/32</a><br> auto=start<br><br></div><div>10.196.172.114 is my local Linux interface and 10.196.175.174 is my peer IP address where I want to establish an IKE connection to.</div><div><br></div><div>~ # netstat -an | grep 500<br>udp 0 0 <a href="http://172.16.20.62:500" target="_blank">172.16.20.62:500</a> 0.0.0.0:* <br>udp 0 0 <a href="http://127.0.0.1:45006" target="_blank">127.0.0.1:45006</a> 0.0.0.0:* <br>udp 0 0 <a href="http://172.16.20.62:4500" target="_blank">172.16.20.62:4500</a> 0.0.0.0:* <br>unix 2 [ ] DGRAM 50035 <br><br></div><div>~ # netstat -an | grep 4500<br>udp 0 0 <a href="http://127.0.0.1:45006" target="_blank">127.0.0.1:45006</a> 0.0.0.0:* <br>udp 0 0 <a href="http://172.16.20.62:4500" target="_blank">172.16.20.62:4500</a> 0.0.0.0:* <br>~ # <br><br></div><div>I don't see any other application binding to this port from 10.196.172.114 address.</div><div><br></div><div>Any idea on what I am missing here? </div><div><br></div><div>Also a related question, if I plan to use VLAN on the network interface in future, where do I specify the vlan-id in the Libreswan configuration?</div><div><br></div><div>Thanks,</div><div>Balaji</div><div><br></div></div></div></div></div></div><br><div class="gmail_quote"><div class="gmail_attr" dir="ltr">On Sat, May 23, 2020 at 11:09 PM Paul Wouters <<a href="mailto:paul@nohats.ca" target="_blank">paul@nohats.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="auto">Normally, only the “ipsec” command is in a system sbin directory. All sub commands, like “ipsec pluto” or “ipsec auto” are in the libexec/ipsec directory. Those starting with an underscore are deemed “internal only” and should not be called by humans.<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On May 23, 2020, at 21:29, Balaji Thoguluva <<a href="mailto:tbbalaji@gmail.com" target="_blank">tbbalaji@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Please ignore my question in my previous email. I found that it is in /usr/local/sbin.</div><div><br></div><div>Thanks,</div><div>Balaji</div></div><br><div class="gmail_quote"><div class="gmail_attr" dir="ltr">On Sat, May 23, 2020 at 1:23 PM Balaji Thoguluva <<a href="mailto:tbbalaji@gmail.com" target="_blank">tbbalaji@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div dir="ltr"><div>Hi Paul,</div><div><br></div><div>Thanks for the continued support.</div><div><br></div><div>I have integrated Libreswan source code with my Linux-based project and integrated binaries of the Libreswan's dependencies and I am able to build the project. </div><div><br></div><div>Can I access the ipsec executable in the built Linux project? If so, where does the ipsec executable typically reside? I could not find it under /usr/sbin, /usr/libexec/ipsec.</div><div><br></div><div>Any suggestions.</div><div><br></div><div>Thanks,</div><div>Balaji </div></div></div><br><div class="gmail_quote"><div class="gmail_attr" dir="ltr">On Mon, May 18, 2020 at 3:05 PM Paul Wouters <<a href="mailto:paul@nohats.ca" target="_blank">paul@nohats.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">On Mon, 18 May 2020, Balaji Thoguluva wrote:<br>
<br>
> I have some general security-policies that just allow the traffic to pass through the system (i.e., no IPsec is applied to those traffic). Say for example, allow all traffic<br>
> of of certain source and destination IP and source and destination port as 5060 (SIP traffic) not processed by IPsec. <br>
> <br>
> In that case, how do I convey this security-policy behavior to Libreswan via the script? What parameters need to be configured? Should I create a separate connection section?<br>
<br>
I would still recommend you do not do this. Double encryption isn't the<br>
worst these days. Excluding will allow people to see things even if not<br>
encrypted. For example, TLS still leaks SNI in cleartext.<br>
<br>
That said, you can simply create the exceptions by doing:<br>
<br>
Individual conn solutions:<br>
<br>
conn skip-tls-out<br>
left=%defaultroute<br>
right=0.0.0.0<br>
leftprotoport=tcp/0<br>
rightprotoport=tcp/443<br>
authby=never<br>
auto=route<br>
<br>
You would do something similar but flipped for incoming TLS. If there is<br>
a mismatch of these between hosts, all communication will fail because<br>
whoever does not have the "cleartext hole" will drop the received clear<br>
text traffic.<br>
<br>
Mesh solution:<br>
<br>
When using mesh encryption (Oportunistic IPsec), you can also specify<br>
the nodes for specific "clear" using protocols and ports. In general,<br>
longest prefix first wins with these type of rule matchines<br>
<br>
# /etc/ipsec.d/policies/private<br>
<a href="http://10.0.0.0/8" target="_blank" rel="noreferrer">10.0.0.0/8</a><br>
<br>
# /etc/ipsec.d/policies/clear<br>
<a href="http://10.0.0.0/24" target="_blank" rel="noreferrer">10.0.0.0/24</a> tcp 0 443<br>
<a href="http://1.0.0.0/0" target="_blank" rel="noreferrer">1.0.0.0/0</a> tcp 443 0<br>
<br>
<br>
Paul<br>
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