I have a Windows Server 2008 R2 backup server running SEP sesam (R) - Standard Edition Kernel: server,4.2.1.27,20121218083446, and am backing up an Ubuntu 12.04.2 LTS client. The client is running sesam installed from sesam-cli-4.2.1.27-linux_i586.tgz. The client is on the other side of a firewall. I am using the Cntrl backup method, the server reports connectivity. I have run the backup with all ports open between the server and client as well as with a restricted set of ports. In both cased I end up with a backup file that is the correct size for a full backup, and a log file that ends with:
W008-BACKUP Backup broken during data transfer, partially restorable. Error: XBSA Call BSAEndData (closing saveset) failed: System detected error, operation aborted. recv() failed with error 110 (110) Connection timed out
Thanks - John

Full Log file listing below:
2013-08-07 14:04:26: sbc-3036: Info: # @(#)SESAM BACKUP CLIENT FOR UNIX FILE SYSTEMS, VERSION: 4.2A3 Build: 1.1126 20130304 14:00:08 Linux i586 postfix #
2013-08-07 14:04:26: sbc-3063: Info: -------------------- Operation Parameters --------------------
2013-08-07 14:04:26: sbc-3100: Info: Program PID: 23987
2013-08-07 14:04:26: sbc-3030: Info: Operation: BACKUP, Level: COPY
2013-08-07 14:04:26: sbc-3002: Info: Building file list from: ["/usr/local/sepsasem/bin/sesam/sbc" "-b" "-C" "Evans:11001" "-S" "Evans:11001" "-l" "COPY" "-s" "SC20130807140434491@1faZYGLoL9K" "-d" "SMS:DS@Storage_6" "-t" "Storage00001:1" "-j" "full_rose" "-i" "job=full_rose,nod=rose.uofdjesuit.org,cmd=sbc,src=all,ptf=UNIX,typ=Path,exc=\./tmp$,\./lost+found$" "-o" "nonfs,noxdev" "-x" "\./tmp$,\./lost+found$" "all" ]
2013-08-07 14:04:26: sbc-3162: Info: Client Host name: Rose
2013-08-07 14:04:26: sbc-3031: Info: Storage Host: ftp://Evans:11001,0-0::
2013-08-07 14:04:26: sbc-3032: Info: Control Host: Evans:11001::
2013-08-07 14:04:26: sbc-3033: Info: Device: SMS:DS@Storage_6:SHARE:0
2013-08-07 14:04:26: sbc-3207: Info: sbc: Found libacl.so -> implicitly switching to acl mode.
2013-08-07 14:04:26: sbc-3034: Info: Saveset Target: SC20130807140434491@1faZYGLoL9K:job=full_rose,nod=rose.uofdjesuit.org,cmd=sbc,src=all,ptf=UNIX,typ=Path,exc=\./tmp$,\./lost+found$:cpio:1:Storage00001:32
2013-08-07 14:04:26: sbc-3064: Info: --------------------- Operation Messages ---------------------
2013-08-07 14:04:26: sbc-3025: Info: Got 5 exclude patterns from SM.INI [SBC_EXCLUDE] ExcludePattern...
2013-08-07 14:04:26: sbc-3026: Info: Exclude pattern [\./opt/novell/nss/mnt/\.pools$]
2013-08-07 14:04:26: sbc-3026: Info: Exclude pattern [/lost+found$]
2013-08-07 14:04:26: sbc-3026: Info: Exclude pattern [\./dev$]
2013-08-07 14:04:26: sbc-3026: Info: Exclude pattern [\./media$]
2013-08-07 14:04:26: sbc-3026: Info: Exclude pattern [\./mnt$]
2013-08-07 14:04:26: sbc-3027: Info: Got 3 ignore patterns from SM.INI [SBC_IGNORE_SIZE_CHANGE] IgnorePattern...
2013-08-07 14:04:26: sbc-3028: Info: Ignore pattern [\./var/log/.*]
2013-08-07 14:04:26: sbc-3028: Info: Ignore pattern [.*\.lgc$]
2013-08-07 14:04:26: sbc-3028: Info: Ignore pattern [.*\.lgx$]
2013-08-07 14:04:26: sbc-3002: Info: Building file list from: [sbc_find ./ -ignore_readdir_race -fstype sysfs -prune -o -fstype proc -prune -o -fstype nfs -prune -o -type d -exec /usr/local/sepsasem/bin/sesam/sbc_nosbc {} ; -prune -o -regex "\./tmp$\|\./lost+found$\|\./opt/novell/nss/mnt/\.pools$\|/lost+found$\|\./dev$\|\./media$\|\./mnt$" -prune -o -print]
2013-08-07 14:04:26: sbc-3003: Info: Opening saveset: SC20130807140434491@1faZYGLoL9K
2013-08-07 14:04:26: sbc-3104: Info: Saveset info: [SEGMENT=1]
2013-08-07 14:04:26: sbc-3004: Info: Begin writing to saveset...
2013-08-07 14:04:26: sbc-3074: Info: Backup start time [20130807140426]
2013-08-07 14:04:26: sbc-3038: Info: Changing working directory to [/].
2013-08-07 14:09:27: sbc-3250: Info: Transferred: 866 MB. Throughput: 10394.69 MB/h
2013-08-07 14:09:27: sbc-3254: Info: Current item [./usr/lib/i386-linux-gnu/libdb-5.1.so]
2013-08-07 14:14:27: sbc-3250: Info: Transferred: 1936 MB. Throughput: 12838.96 MB/h
2013-08-07 14:14:27: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/html/moodle/lib/dragmath/applet/lib/jep.jar]
2013-08-07 14:15:47: sbc-2010: Warning: Unable to access item [./home/studentuofdjesuitssl/moodledata/cache/cachestore_file/default_application/core_config/120/120afbae6464f956098eb9fa36ee69b1293a3c58.cache]: [lstat() failed: No such file or directory].
2013-08-07 14:15:47: sbc-2010: Warning: Unable to access item [./home/studentuofdjesuitssl/moodledata/cache/cachestore_file/default_application/core_config/9ca/9cab5015fcd84e5c7ef96a514e55ee6db236acbe.cache]: [lstat() failed: No such file or directory].
2013-08-07 14:19:27: sbc-3250: Info: Transferred: 3009 MB. Throughput: 12880.34 MB/h
2013-08-07 14:19:27: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/4d/66/4d66503796277a018e9366db6c4457fbe480305c]
2013-08-07 14:24:28: sbc-3250: Info: Transferred: 4092 MB. Throughput: 12943.03 MB/h
2013-08-07 14:24:28: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/13/8b/138bffc10b6a29491bc7dda1412e20521e20a0e2]
2013-08-07 14:29:28: sbc-3250: Info: Transferred: 5255 MB. Throughput: 13960.28 MB/h
2013-08-07 14:29:28: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/96/d0/96d0d87f761c5402b5eae547aa8890a1826a4af3]
2013-08-07 14:34:28: sbc-3250: Info: Transferred: 6423 MB. Throughput: 14011.84 MB/h
2013-08-07 14:34:28: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/b4/3e/b43eeb2de53574ac7f636c63897196417d653313]
2013-08-07 14:39:29: sbc-3250: Info: Transferred: 7609 MB. Throughput: 14190.97 MB/h
2013-08-07 14:39:29: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/e7/dc/e7dc30d47ebc4fe849da0a7f4061e13b1e175c02]
2013-08-07 14:44:29: sbc-3250: Info: Transferred: 8729 MB. Throughput: 13436.72 MB/h
2013-08-07 14:44:29: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/19/28/19282e3b16a4b2dd87e23036258a4824c95aaebc]
2013-08-07 14:49:30: sbc-3250: Info: Transferred: 9808 MB. Throughput: 12944.32 MB/h
2013-08-07 14:49:30: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/35/b8/35b8f5978475e388c54391b6d2652bb52f7e5cd6]
2013-08-07 14:54:30: sbc-3250: Info: Transferred: 10906 MB. Throughput: 13185.46 MB/h
2013-08-07 14:54:30: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/8c/b5/8cb59219ca70e997cc3d9a13cf0a0ef35da41d73]
2013-08-07 14:59:31: sbc-3250: Info: Transferred: 12034 MB. Throughput: 13491.56 MB/h
2013-08-07 14:59:31: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/10/dd/10ddde36eab8f68c3f3ded8e8746afeb86eef270]
2013-08-07 15:04:31: sbc-3250: Info: Transferred: 13210 MB. Throughput: 14112.38 MB/h
2013-08-07 15:04:31: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/af/39/af399531401071b699b543bb82d9e43496c9aaf8]
2013-08-07 15:09:31: sbc-3250: Info: Transferred: 14322 MB. Throughput: 13334.48 MB/h
2013-08-07 15:09:31: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/04/fe/04fe1c824327e42bd710b5dd41abe3c12070ed00]
2013-08-07 15:14:32: sbc-3250: Info: Transferred: 15655 MB. Throughput: 16004.74 MB/h
2013-08-07 15:14:32: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/1d/86/1d86528a0b9058328421bb8cd0ba6f797d881c58]
2013-08-07 15:19:32: sbc-3250: Info: Transferred: 16889 MB. Throughput: 14803.73 MB/h
2013-08-07 15:19:32: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/fb/ae/fbae6988c2c55b0c187462482c3e24b84e80c8f9]
2013-08-07 15:24:33: sbc-3250: Info: Transferred: 18014 MB. Throughput: 13496.50 MB/h
2013-08-07 15:24:33: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/ae/70/ae7064c0a404a2c9d2670aa31c718af526cb88f9]
2013-08-07 15:29:33: sbc-3250: Info: Transferred: 19398 MB. Throughput: 16605.85 MB/h
2013-08-07 15:29:33: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/ad/71/ad7106c64d24f098e709a8c0de847700b551a78d]
2013-08-07 15:34:34: sbc-3250: Info: Transferred: 20634 MB. Throughput: 14835.84 MB/h
2013-08-07 15:34:34: sbc-3254: Info: Current item [./home/studentuofdjesuitssl/moodledata/filedir/57/94/57945d999314b5fa9da11c6ae6716afd80bf4e07]
2013-08-07 15:39:34: sbc-3250: Info: Transferred: 21890 MB. Throughput: 15076.17 MB/h
2013-08-07 15:39:34: sbc-3254: Info: Current item [./var/cache/apt/archives/latex-beamer_3.10-1_all.deb]
2013-08-07 15:44:35: sbc-3250: Info: Transferred: 23179 MB. Throughput: 15470.60 MB/h
2013-08-07 15:44:35: sbc-3254: Info: Current item [./var/lib/mongodb/journal/j._0]
2013-08-07 15:49:35: sbc-3250: Info: Transferred: 24660 MB. Throughput: 17770.50 MB/h
2013-08-07 15:49:35: sbc-3254: Info: Current item [./var/lib/mongodb/journal/prealloc.2]
2013-08-07 15:54:18: sbc-3500: Info: All hardlinks completely saved.
2013-08-07 15:54:18: sbc-3006: Info: Saveset size: 27792053248 bytes. Throughput: 14474.581702 MB/Hour.
2013-08-07 15:54:18: sbc-3005: Info: Closing saveset.
2013-08-07 16:15:44: sbc-1010: Error: XBSA Call BSAEndData (closing saveset) failed: System detected error, operation aborted. recv() failed with error 110 (110) Connection timed out
2013-08-07 16:15:44: sbc-3310: Info: Saveset checksum (adler32): 3345147262.
2013-08-07 16:15:44: sbc-3052: Info: Items processed correctly: [287505]. Not processed or incorrectly processed items: [2].
2013-08-07 16:15:44: sbc-3053: Info: Operation failed!
2013-08-07 16:15:44: sbc-3001: Info: Exiting.
W008-BACKUP Backup broken during data transfer, partially restorable. Error: XBSA Call BSAEndData (closing saveset) failed: System detected error, operation aborted. recv() failed with error 110 (110) Connection timed out
mailed from SEP Sesam Server running os Windows Server 2008 R2 6.1 amd64 with java version: 1.6.0_31 class version: 50.0 java vendor Sun Microsystems Inc.