it works on my side. Talk to your sysadmin (proxy settings...)

$ wget -q -O - "https://ftp.cngb.org/pub/gigadb/pub/10.5524/100001_101000/100355/transcript-alignments/LowAltitude_cattle_lung_2.bam" | samtools view | head
HWI-ST1307:161:C3UG9ACXX:4:2112:15873:27236 163 1   1044    50  100M    =   1097    153 CTCCAACAACATAGGAACATAGCCCTGAACATTAAAATACAGGCTGCCCAACGTCATGTCAAACCCATAGATGCCCCAAAACTCACTCCTGGACACTTCA    CCCFFFFFHHHHHJIJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJGHIHIJIJJJIIIJJJHHHHHFFFFFDDDEDDDDDDDDDDDDDDDDDDDD    AS:i:0  XN:i:0  XM:i:0  XO:i:0  XG:i:0  NM:i:0  MD:Z:100    YT:Z:UU NH:i:1  XS:A:+
HWI-ST1307:161:C3UG9ACXX:4:2112:15873:27236 83  1   1097    50  100M    =   1044    -153    TCATGTCAAACCCATAGATGCCCCAAAACTCACTCCTGGACACTTCATTGCACTCCAGAGAGAAGAGATCCAGTTCCACTGACCAGAACACAGATGCAAG    CDDCCA???>DDEDEEEEFFFHFHDGG@FCF=HEJIJIIGF?JIIJJIHIHIJGJIIJJJJIIJIIJJJJIJJIGJIHJJJIJJJJIHHHHHFFFFFCCC    AS:i:-6 XN:i:0  XM:i:1  XO:i:0  XG:i:0  NM:i:1  MD:Z:79C20  YT:Z:UU NH:i:1  XS:A:+
HWI-ST1307:161:C3UG9ACXX:4:2212:15874:29325 163 1   1685    3   100M    =   1781    196 GGAAAAAGAAGAAAGAATTAAAACAAATGAGGACAACCTCAGAGGCCTCTGCGACAATGTTAAATGCCCCAACATTTGAATCATAGGAGTCTCAGCAGAA    BC@FFFFFFHHHHJJIIIIJJJJJJIGGIJJJJJIJJJJJIIJIIJJIIIHIIIIJIGGHHHHGDHDEFFDDDDDDFEDDDDDDDDDDDCDDDEDDDDDD    AS:i:-11    XN:i:0  XM:i:2  XO:i:0  XG:i:0  NM:i:2  MD:Z:6C12G80    YT:Z:UU NH:i:2  CC:Z:7  CP:i:42372672   XS:A:+  HI:i:0
HWI-ST1307:161:C3UG9ACXX:4:2212:15874:29325 83  1   1781    3   100M    =   1685    -196    AGAAGACAACAAAAAGAAAGGGCATGAGAAAATACCTGAGGAGATAATAGTTGAAATTTTCTCTAAAATGGGGAAGGAAATAGCCACCAAAGCCCAAGAA    DDDDDDDDEDEEFFFFFFHHHHHJIJJIIJIGHFJIIIIJJJJJJJJGIIJJJIJIIJJJJJIJJJJIIJJJJJJJJJJIHJJHFEJGGHHGFFFFFCCC    AS:i:-5 XN:i:0  XM:i:1  XO:i:0  XG:i:0  NM:i:1  MD:Z:7G92   YT:Z:UU NH:i:2  CC:Z:7  CP:i:42372576   XS:A:+  HI:i:0
HWI-ST1307:161:C3UG9ACXX:4:2301:3428:46249  163 1   3328    50  100M    =   3378    150 GAAAAAGAAACAAAGGAGGCTATAGCAAAAATCAACAAAACTAACAGCTGGTTCTTTGAGAAGATAAATAAAATAGACAAACCATTAGCCAGACTCATCA    CCCFFFFFHHHHHJJIJJJJJJIJJJIJJJJJIIIJJIJJJJJIJJJJIJHIIJJJJJIJJJJIIJHHHHHHFFFFFFDEEDDDDCDDDDDDDDDDDCDD    AS:i:-5 XN:i:0  XM:i:1  XO:i:0  XG:i:0  NM:i:1  MD:Z:9G90   YT:Z:UU NH:i:1  XS:A:+
HWI-ST1307:161:C3UG9ACXX:4:1108:18449:7446  163 1   3331    50  100M    =   3424    193 AAAGAAACAAAGGAGGCTATAGCAAAAATCAACAAAACTAACAGCTGGTTCTTTGAGAAGATAAATAAAATAGACAAACCATTAGCCAGACTCATCAAGA    CCCFFFFFHHHHGIJJIGIGGHIIJIJJJJIJJJGIJJJJJJJGGIJJGIFGIJJIIIIJGJJJJJJJJHHHHHHFFEFDDEEEEDDDDBDDDDDDDCDC    AS:i:-5 XN:i:0  XM:i:1  XO:i:0  XG:i:0  NM:i:1  MD:Z:6G93   YT:Z:UU NH:i:1  XS:A:+
HWI-ST1307:161:C3UG9ACXX:4:2301:3428:46249  83  1   3378    50  100M    =   3328    -150    GTTCTTTGAGAAGATAAATAAAATAGACAAACCATTAGCCAGACTCATCAAGAAAAAAAGGAGAAAATCAAATCAACAAAATTAGAAATGAAAATGGAGA    DDDDDCA@CCFC@D@FFD@FFFEECFHFIHEJGHCGJJIIHGHGIIHEJJJJJJIJJJJIJJJJJIHCJJJIHJJHJJJJIHGJJIJHFHHHFFFFFCCC    AS:i:0  XN:i:0  XM:i:0  XO:i:0  XG:i:0  NM:i:0  MD:Z:100    YT:Z:UU NH:i:1  XS:A:+